CMC 356 Reference Manual CMC 356 Reference Manual

CMC 356 Reference Manual

OMICRON Test Set CMC 356

CMC, 356

OMICRON electronics

CMC 356 Reference Manual

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CMC-356-User-Manual

CMC 356
Reference Manual

CMC 356 Reference Manual
Article Number VESD2003 - Version CMC356.AE.7 - Year: 2013 © OMICRON electronics. All rights reserved.
This manual is a publication of OMICRON electronics. All rights including translation reserved. Reproduction of any kind, e.g., photocopying, microfilming, optical character recognition and/or storage in electronic data processing systems, requires the explicit consent of OMICRON electronics. Reprinting, wholly or in part, is not permitted. The product information, specifications, and technical data embodied in this manual represent the technical status at the time of writing and are subject to change without prior notice. We have done our best to ensure that the information given in this manual is useful, accurate and entirely reliable. However, OMICRON electronics does not assume responsibility for any inaccuracies which may be present. The user is responsible for every application that makes use of an OMICRON product. OMICRON electronics translates this manual from the source language English into a number of other languages. Any translation of this manual is done for local requirements, and in the event of a dispute between the English and a non-English version, the English version of this manual shall govern.
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TABLE OF CONTENTS

Table of Contents

Preface...................................................................................................................... 7
Safety Instructions .................................................................................................. 8
1 Designated Use ............................................................................................ 11
2 Introduction .................................................................................................. 12
2.1 Options Available for the CMC 356 Test Set................................................................. 12
3 Operating the CMC 356 ............................................................................... 13
3.1 System Components ..................................................................................................... 13 3.2 Safe Use of the Connecting Cables ............................................................................... 14
3.2.1 Test Lead Adapter for Non-Safety Sockets ....................................................... 14 3.3 Regular Test Leads for Safety Sockets .......................................................................... 15
3.3.1 Terminal adapters.............................................................................................. 15 3.3.2 M4 (0.15") Cable Lug Adapters ......................................................................... 16 3.3.3 M5 (0.20") Cable Lug Adapters ......................................................................... 16 3.4 Starting the Test System ................................................................................................ 17
4 Setup and Function ..................................................................................... 19
4.1 Block Diagram ............................................................................................................... 20 4.1.1 Voltage Output (Voltage Amplifier) .................................................................... 21 4.1.2 Current Output (Current Amplifier)..................................................................... 22 4.1.3 Binary / Analog Input (Binary Inputs 1 - 10)....................................................... 23 4.1.4 Binary Output..................................................................................................... 23 4.1.5 AUX DC (DC Power for Test Objects) ............................................................... 24 4.1.6 CPU ................................................................................................................... 25 4.1.7 Power Supplies (DC-DC)................................................................................... 25
4.2 Signal Generation........................................................................................................... 26 4.2.1 Accuracy and Signal Quality.............................................................................. 26
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CMC 356 Reference Manual
5 Connections and Interfaces ........................................................................ 27
5.1 Front Panel Connections ............................................................................................... 27 5.1.1 Generator Combination Socket for VOLTAGE OUTPUT and CURRENT OUTPUT ............................................................................................................ 30
5.2 Connections on the Back Panel .................................................................................... 32 5.2.1 USB Port............................................................................................................ 32 5.2.2 Ethernet Ports ETH1 and ETH2 ........................................................................ 33 5.2.3 ! Button .............................................................................................................. 33 5.2.4 Associate Button................................................................................................ 33 5.2.5 Status LED A, B................................................................................................. 34 5.2.6 Ethernet / Network Settings ............................................................................... 35 5.2.7 SELV Interfaces................................................................................................. 36 5.2.7.1 External Interface ("ext. Interf.") ......................................................... 36 5.2.7.2 LL out 1-6 (Low Level Outputs 1-6) .................................................... 37 5.2.7.3 LL out 7-12 (Low Level Outputs 7-12) - Option "LLO-2"..................... 37
6 Technical Data .............................................................................................. 39
6.1 Main Power Supply........................................................................................................ 39 6.2 Insulation Coordination.................................................................................................. 40 6.3 Outputs .......................................................................................................................... 41
6.3.1 Extended Frequency Range .............................................................................. 42 6.3.2 Current Outputs ................................................................................................. 43 6.3.3 Voltage Outputs ................................................................................................. 48
6.3.3.1 Power Diagram for Three-Phase Operation ....................................... 49 6.3.3.2 Power Diagram for Single-Phase Operation ...................................... 50 6.3.4 Operational Limits in Conjunction with Mains Supply ........................................ 51 6.3.5 Low Level Outputs "LL out" for External Amplifiers ........................................... 52 6.3.6 Low-Level Binary Outputs ("ext. Interf.")............................................................ 54 6.3.7 Binary Output Relays......................................................................................... 56 6.3.8 DC Supply (AUX DC)......................................................................................... 57 6.4 Inputs.............................................................................................................................. 58 6.4.1 Binary Inputs...................................................................................................... 58 6.4.2 Counter Inputs 100 kHz (Low Level) ................................................................. 61 6.5 Technical Data of the Communication Ports .................................................................. 63 6.5.1 The NET-1C Board ............................................................................................ 63 6.5.2 The NET-1B Board ............................................................................................ 64 6.5.3 The NET-1 Board............................................................................................... 64
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Table of Contents
6.6 Environmental Conditions............................................................................................... 66 6.6.1 Climate............................................................................................................... 66 6.6.2 Shock and Vibration........................................................................................... 66
6.7 Mechanical Data............................................................................................................ 66 6.8 Cleaning ........................................................................................................................ 66 6.9 Safety Standards, Electromagnetic Compatibility (EMC) and Certificates ..................... 67 6.10 Option ELT-1 ................................................................................................................. 68
6.10.1 General Data ..................................................................................................... 69 6.10.2 Analog DC Input (VDC, IDC) ............................................................................. 70 6.10.3 Accuracy of the Analog DC Input....................................................................... 71 6.10.4 Measuring Currents ........................................................................................... 72 6.10.5 Accuracy of Binary/Analog Inputs with Option ELT-1 ........................................ 73 6.10.6 Multimeter Mode ................................................................................................ 74
6.10.6.1 Accuracy of AC Measurements .......................................................... 75 6.10.6.2 Channel Cross-Talk............................................................................ 77 6.10.6.3 Accuracy of Phase Measurement....................................................... 78 6.10.6.4 Accuracy of Frequency Measurement................................................ 80 6.10.6.5 Accuracy of Power Measurement....................................................... 81 6.10.7 Harmonic Analysis ............................................................................................. 85 6.10.7.1 Accuracy of Frequency Measurement................................................ 86 6.10.7.2 Accuracy of Amplitude Measurement................................................. 87 6.10.7.3 Accuracy of Phase Measurement....................................................... 88 6.10.8 Transient Recording .......................................................................................... 89 6.10.9 Trend Recording ................................................................................................ 90 6.11 Option LLO-2 (Low Level Outputs)................................................................................. 91
7 Increasing the Output Power, Operating Modes ....................................... 93
7.1 Safety Instructions for High Current Output................................................................... 93 7.2 Single-Phase Operation of the CMC 356 ...................................................................... 94
7.2.1 1 x 32 A High Burden Mode (L-L-L-L)................................................................ 94 7.2.2 1 x 64 A High Burden and High Current Mode (L-L).......................................... 95 7.2.3 1 x 128 A High Current Mode (LL-LN) ............................................................... 96 7.2.4 Single-Phase Voltage ........................................................................................ 97 7.3 Two-Phase Operation..................................................................................................... 98 7.3.1 2 x 64 A High Current Mode (LL-LN) ................................................................. 98 7.3.2 2 x 32 A High Burden Mode (L-L) ...................................................................... 99 7.4 Three-Phase Current Mode with High Burden ............................................................. 100 7.5 Operation with External Amplifiers ............................................................................... 101
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CMC 356 Reference Manual
8 Troubleshooting ......................................................................................... 103
8.1 Troubleshooting Guide ................................................................................................ 103 8.2 Potential Errors, Possible Causes, Remedies............................................................. 104
Legal Notice Concerning the OMICRON Bootloader Software ....................... 105 OMICRON Service Centers ..................................................................................109 Index ..................................................................................................................... 111
6

Preface
PREFACE
The purpose of this reference manual is to familiarize users with the CMC 356 test set and to show how to properly use it in various application areas. The manual contains important tips on how to use the CMC 356 safely, properly, and efficiently. Its purpose is to help you avoid danger, repair costs, and down time as well as to help maintain the reliability and life of the CMC 356. This manual is to be supplemented by existing national safety standards for accident prevention and environmental protection. The reference manual should always be available at the site where the CMC 356 is used. It should be read by all personnel operating the test set. Note: The OMICRON Test Universe software also installs a PDF version of this reference manual. It can directly be opened by a mouse-click from the help topic "User Manuals of OMICRON Test Universe". In addition to the reference manual and the applicable safety regulations in the country and at the site of operation, the usual technical procedures for safe and competent work should be heeded. Note: This reference manual describes the CMC 356 hardware - that is, the physical test set. In order to get familiar with the software for controlling and configuring the CMC 356, please refer to the software manuals and/or the OMICRON Test Universe Help.
For Your Safety Please Note
The CMC 356 test set can output life-hazardous voltages and currents. Throughout the manual, this symbol indicates special safety-relevant notes/directions linked to the possibility of touching live voltages and/or currents. Please thoroughly read and follow those directions to avoid lifehazardous situations. This symbol indicates potential hazards by electrical voltages/currents caused by, for example, wrong connections, short-circuits, technically inadequate or faulty equipment or by disregarding the safety notes of the following sections.
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CMC 356 Reference Manual

SAFETY INSTRUCTIONS

Before operating the CMC 356 test set, carefully read the following safety instructions.
Only operate (or even turn on) the CMC 356 after you have read this reference manual and fully understood the instructions herein.
The CMC 356 may only be operated by trained personnel. Any maloperation can result in damage to property or persons.
Rules for Use

· The CMC 356 should only be used when in a technically sound condition. Its use should be in accordance with the safety regulations for the specific job site and application. Always be aware of the dangers of the high voltages and currents associated with this equipment. Pay attention to the information provided in the reference manual and the software documentation.
· The CMC 356 is exclusively intended for the application areas specified in section 1, "Designated Use" on page 11. The manufacturer/ distributors are not liable for damage resulting from unintended usage. The user alone assumes all responsibility and risk.
· The instructions provided in this reference manual and the associated software manuals are considered part of the rules governing proper usage.
· Do not open the CMC 356 or remove any of its housing components.
Orderly Practices and Procedures

· The reference manual (or its "electronic PDF pendant", which is installed to your computer with the OMICRON Test Universe software) should always be available on site where the CMC 356 is used.

Note: The OMICRON Test Universe software also installs a PDF version

of this reference manual. It can directly be opened by a mouse-click from

the help topic "User Manuals of OMICRON Test Universe". The

Test Universe Help can be launched by clicking Help on the Start Page.

· Personnel assigned to using the CMC 356 must have read this reference manual and fully understood the instructions herein.

· Do not carry out any modifications, extensions or adaptations at the CMC 356.

Safety Instructions
Operator Qualifications
· Testing with the CMC 356 should only be carried out by authorized and qualified personnel.
· Personnel receiving training, instruction, direction, or education on the CMC 356 should remain under the constant supervision of an experienced operator while working with the equipment.
Safe Operation Procedures
· Follow the instructions in sections 3.2 and 3.4 that describe the safe use of the connecting cables and how to set the CMC 356 into operation.
· The CMC 356 must only be used from a power outlet that has a protective earth.
· Do not block the access to safety-relevant test set components like the main power switch or the power cord. In cases of an emergency, these components need free and quick access.
· Do not connect any of the front panel VOLTAGE/CURRENT OUTPUTS 1 ... 3 or VOLTAGE OUTPUT 4, respectively, to protective earth. The N sockets, however, may be connected to protective earth.
· When connecting to the banana plug sockets, only use cables with 4 mm/0.16 " safety banana connectors and plastic housing. Always insert plugs completely.
· Before connecting and disconnecting test objects, verify that all outputs have been turned off. Never connect or disconnect a test object while the outputs are active.
· When disconnecting power supply cables or test leads, always start from the device feeding the power or signal.
· All sockets on the front panel are to be considered dangerous with working voltages up to 300 Vrms. Only use cables that meet these respective requirements to connect to the equipment.
· Red Signal Light ! : If the voltage on any of the four voltage outputs or on the "AUX DC" output exceeds 42 V, the associated signal light lights up.
· Do not insert objects (e.g., screwdrivers, etc.) into the sockets or into the ventilation slots.
· Do not operate the CMC 356 under wet or moist conditions (condensation).
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CMC 356 Reference Manual
· Do not operate the CMC 356 when explosive gas or vapors are present. · Connect only external devices to the CMC 356 interfaces "USB", "ETH",
"LL out" and "ext. Interf." that meet the requirements for SELV equipment (SELV = Safety Extra Low Voltage) according to EN 60950 or IEC 60950. · For applications drawing DC current: The load may not exceed 3 mH because of dangerous feedback current. · When setting up the CMC 356, make sure that the air slots on the back, top, and bottom of the test set remain unobstructed. · Voltages up to 1 kV can be present inside the CMC 356! Therefore, opening the CMC 356 is only permitted by qualified experts either at the factory or at certified external repair centers. · If the CMC 356 is opened by the customer, all guarantees are invalidated. · CMC 356 Ethernet functionality (see section 5.2.2, "Ethernet Ports ETH1 and ETH2" on page 33): - It is a product of laser class 1 (EN 60825, IEC 60825). - Connect ETH1 only to Ethernet ports. · If the CMC 356 seems to be functioning improperly, please contact the OMICRON Technical Support (see section "OMICRON Service Centers" on page 85).
Changing the Power Fuse
· Unplug the power cord between the test set and the power source. · The fuse is located at the back of the test set. · Fuse type: T12.5 AH 250 V (wire fuse 5 × 20 mm).
For safety reasons please use only fuse types recommended by the manufacturer. Refer to 6.1, "Main Power Supply" on page 39 for more information.
10

Designated Use
1 DESIGNATED USE
The CMC 356 is a computer-controlled test set for the testing of: · protection relays · transducers · energy meters · PQ (power quality) analyzers. In addition to the test functions, optional high-performance measurement functions [0 Hz (DC) ... 10 kHz] for ten analog inputs are available. The CMC 356 is part of the OMICRON Test Universe which, in addition to the physical test set, consists of a test software for a computer with Windows1 operating system, and, when needed, external voltage and/or current amplifiers, GPS or IRIG-B synchronization units or other accessories.
Features of the CMC 356: · Output of test quantities:
- 4 × voltage - two galvanically separated three-phase current outputs. · Capability of protection testing with IEC 61850 devices. · Control of external amplifiers through the low-level interface (6 additional test signals with a standard test set at LL out 1-6; six more test signals with the LLO-2 (low level outputs 7-12) option. · Supply of DC voltages to the test object. · Output of binary signals. · Capture of binary signals and counter impulses. · Option ELT-1: Measurement and analysis of DC and AC voltages and currents by means of a clip-on probe (refer to section 6.10, "Option ELT-1" on page 68) or a measurement shunt. Any other use of the CMC 356 is considered improper and may result in damage to property or persons.
1 Windows is a US registered trademark of Microsoft Corporation.
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CMC 356 Reference Manual
2 INTRODUCTION
The CMC 356 is a part of the OMICRON Test Universe which, in addition to the physical test set, consists of a test software for a computer with Microsoft Windows operating system, and, when needed, external voltage and/or current amplifiers, GPS or IRIG-B synchronization units or other accessories. This reference manual describes the hardware of the CMC 356. The configuration and control of the CMC 356 is carried out by the test software of the OMICRON Test Universe. For more detailed information, please read the user manuals and the OMICRON Test Universe Help. Note: The OMICRON Test Universe software also installs a PDF version of
? this reference manual. It can directly be opened by a mouse-click from the
Test Universe Help topic "User Manuals".
2.1 Options Available for the CMC 356 Test Set
The following options are available for the CMC 356 test set: · ELT-1
This hardware option enables: · Measurement of analog signals using the combined
BINARY / ANALOG INPUT sockets. · High-precision measurement of DC signals using the ANALOG DC
INPUT sockets. For detailed information, please refer to section 6.10, "Option ELT-1" on page 68). · LLO-2 (low level outputs 7-12) SELV interface connector holding two independent generator triples (SELV = Safety Extra Low Voltage). These six additional high accuracy analog signal sources can serve to either control an external amplifier or to directly provide small signal outputs. For more information please refer section 6.3.5, "Low Level Outputs "LL out" for External Amplifiers" on page 52.
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Operating the CMC 356
· FL-6 In a number of countries (e.g., Japan), the export of multiphase generators able to output steady signals with a frequency between 600 Hz and 2000 Hz is not permitted. The FL-6 option constraints the maximum fundamental frequency that the test set can generate to 599 Hz. Test sets with the FL-6 option can therefore be exported without any restrictions (refer to 6.3, "Outputs" on page 41).
3 OPERATING THE CMC 356
Only operate (or even turn on) the CMC 356 after you have read this reference manual and fully understood the instructions herein.
3.1 System Components
Before operating the CMC 356 for the first time, use the packing list to verify that all components of the test system are available. To set the CMC 356 into operation you need the following components: · CMC 356 with (mains) power cable · Connecting cable CMC 356 PC · Connecting cable CMC 356 test object · A computer equipped with the OMICRON Test Universe software.
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CMC 356 Reference Manual

3.2 Safe Use of the Connecting Cables

3.2.1

Test Lead Adapter for Non-Safety Sockets
The optional CMC Wiring Accessory Package includes flexible test lead adapters of 5 cm/2 " length with a retractable sleeve (6 x black, 6 x red).

Retractable sleeve
These test leads are to be used as adapters, only. They are intended to make the 4 mm/0.16 " banana plugs of the standard test leads fit into non-safety sockets (see illustration above). Never directly insert one of these retractable sleeves into a CMC 356 output socket at the front of the test set. This does not comply with the designated purpose of these leads and is contrary to the safety regulations.

Safety socket of, for example, the CMC 356 test set.

Plug only the regular test leads of 2.0 m/6 ft. length into the CMC 356 output safety sockets.

Regular test lead

Test lead adapter

Non-safety socket

Operating the CMC 356

3.3 Regular Test Leads for Safety Sockets
Use the regular test leads of 2.0 m/6 ft. length to connect the CMC 356 output to other safety sockets of, for example, amplifiers, test objects or to banana adapters in control cabinets.
Regular test lead
to terminal strip

3.3.1

CMC 356 test set or amplifier

or to safety socket, e.g., at test object.

Terminal adapters

The optional CMC Wiring Accessory Package includes flexible terminal adapters to connect the regular test leads to screw-clamp terminals.

Regular test lead

Terminal adapter
The terminal adapters have blank ends. Therefore, turn off the voltage before connecting these adapters. Always insert an adapter with its blank end into the terminal strip first, and fasten it before connecting it to a test lead.

CMC 356 Reference Manual

3.3.2

M4 (0.15") Cable Lug Adapters
The optional CMC Wiring Accessory Package includes M4 (0.15") cable lug adapters to connect regular test leads to screw-clamp terminals of SEL/ABB/GE relays (and others).
Regular test lead

M4 (0.15") cable lug adapter

3.3.3

The cable lugs have blank ends. Therefore, turn off the voltage before connecting such a lug. Always insert the cable lug with its blank end into the terminal strip first, and fasten it, before connecting it to a test lead.
M5 (0.20") Cable Lug Adapters
The optional CMC Wiring Accessory Package includes M5 (0.20") cable lug adapters to connect regular test leads to common and most widespread screw-clamp terminal types.

Regular test lead

M5 (0.20") cable lug adapter

Operating the CMC 356
3.4 Starting the Test System
The following description assumes that the computer has been set up and that the test software for the OMICRON Test Universe has been installed. At this point of time you may want to have a look at the Getting Started with Test Universe manual. This manual guides you through the first steps and actions with the Test Universe software. Learn · how to associate a CMC test set with your computer and what to do if the
association won't work · about the Test Universe Start Page · how to output voltages and currents with your CMC test set using the
QuickCMC test module · how to set up a test with Test Object and Hardware Configuration. This manual is provided in PDF format. It is available on your hard disk after the installation of OMICRON Test Universe. To view the manual, start the Test Universe Help from the Start Page or any test module and navigate to the table of contents entry User Manuals (at the beginning of the table of contents). Click Test Universe Software Manuals. In this topic you find a direct link at "Getting Started". To view the manual, click the link. This description refers both to the computer and to the CMC 356. It does not take into consideration any external devices. If the system is driven by external amplifiers, follow the instructions in section 7.5, "Operation with External Amplifiers" on page 101. When setting up the CMC 356, make sure not to obstruct the ventilation slots.
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CMC 356 Reference Manual

Figure 3-1: Connecting the CMC 356 to the computer

Connecting the system components1:

Either Ethernet or USB

NET-1C board with USB and Ethernet
connectors

1. Connect the CMC 356:
· from the Ethernet connector ETH1 at the CMC's rear side (available on NET-1, NET-1B & NET-1C board) to your computer's Ethernet port
· or from the USB port of the CMC's NET-1C board to your computer's USB port
For more information about the NET-1(x) boards, refer to section "Technical Data of the Communication Ports" on page 74.
For instructions how to incorporate network-capable CMC test sets like the CMC 356 into a computer network, refer to the Getting Started with Test Universe manual. To view the manual, start the Test Universe Help from the Start Page or any test module and navigate to the table of contents entry User Manuals (at the beginning of the table of contents). Click Test Universe Software Manuals. In this topic you find a direct link at "Getting Started". To view the manual, click the link.
2. Connect the CMC 356 test set to the mains.
3. Turn on both devices.
4. Start the OMICRON Test Universe software.
A comprehensive hardware test is carried out on the CMC 356. In the process, switching sounds from relays in the CMC test set can be heard. If any irregularities are determined during the course of this self-test, the software displays a corresponding error message on the PC monitor (refer to section 8, "Troubleshooting" on page 103).

1 To ensure the required EMC compatibility, we strongly recommend to use the OMICRON-supplied cable, only.
18

Setup and Function
4 SETUP AND FUNCTION
The computer-controlled OMICRON test system employs the concept of a functional division between the software running on the computer and the CMC 356 hardware connected to the test object. OMICRON Test Universe test software running on the computer · controls the test signals · processes measurement data · creates reports · generates data entries. The CMC 356 test set · creates test signals (currents, voltages, binary signals) · measures the reaction (analog and binary) from the test object · supplies DC-current to test objects.
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CMC 356 Reference Manual

4.1
Figure 4-1: Main block diagram of
the CMC 356

Block Diagram

1* Note regarding the hardware option ELT-1: The hardware option ELT-1 enables the measurement of analog signals using the CMC 356. In the standard configuration (CMC 356 without option ELT-1), the inputs BINARY/ANALOG INPUT 1 - 10 can only be used as binary inputs, and DC inputs are not available.
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Main Group
DC Mains AC PE

DC DC

BINARY OUTPUT 1 234

ANALOG DC INPUTS

U I DC

AUX DC
Internal Supplies

ADC working isolation

12 AFE

BINARY/ANALOG INPUT

AFE

9 10 AFE

VOLTAGE

CURRENT A

CURRENT B

Control

AUX DC

0...264VDC

Host Interface

CPU
System Control (Signal Generator)

SELV Group

ext. Interf.

LL out 1-6

LL out 7-12
(optional)

CMGPS Bin. Out Counter Ext. IRIG-B 11...14 1,2 Ampl.

Ext. Ampl.

Control

VOLTAGE OUTPUT

4 x 0...300V

Control

CURRENT OUTPUT A

3 x 0...32A

Control

CURRENT OUTPUT B

3 x 0...32A

Setup and Function

The block schematic diagram in figure 4-1 shows all externally accessible signals with gray shading. Every gray area represents a galvanic group that is isolated from all of the other galvanic groups.
The power connection ("power supply group") and the connections for "SELV group" (SELV = Safety Extra Low Voltage) are available on the back of the test set. All other gray shaded groups are available on the front of the test set. The safety relevant isolated circuits (power SELV, power front plate, and front plate SELV) are marked as "reinforced isolation" in the block diagram.

4.1.1
Figure 4-2: Voltage amplifier (voltage outputs)

Voltage Output (Voltage Amplifier)

The four voltage outputs have a common neutral N and are galvanically separated from all other outputs of the CMC 356. The two black sockets labeled "N" are galvanically connected with one another.
The voltage amplifier and the current amplifiers are linear amplifiers with DC coupling. The voltage outputs work in two ranges:
· Range 1: 4 x 0 ... 150 V
· Range 2: 4 x 0 ... 300 V
Protecting the Voltage Outputs
All voltage outputs are protected for open circuits, L-N short-circuits, and overload. Should the heat sink overheat, a thermal switch turns off all outputs.
Overload Warning Flagged in the Software
When a voltage output is overloaded, a corresponding warning is displayed in the user interface of the test software of the OMICRON Test Universe.
Do not connect any of the VOLTAGE OUTPUTS 1 ... 3 or VOLTAGE OUTPUT 4, respectively, to protective earth. The N sockets, however, may be connected to protective earth.

CMC 356 Reference Manual

4.1.2 Current Output (Current Amplifier)

Figure 4-3: CMC 356 current outputs groups A & B

CURRENT OUTPUT A
CURRENT OUTPUT B
Two galvanically separated three-phase current outputs, each with their own neutral (N).
Each output is galvanically separated from all other connections of the CMC 356.

The current amplifiers are implemented as switched mode amplifiers with DC coupling. With this technology it is possible to achieve high power density in a very compact structure. The DC coupling enables a precise reproduction of transients or DC offsets.
Protecting the Current Outputs
All current outputs are protected for open circuits, short-circuits, and overload. If the heat sink overheats, a thermo switch turns off all outputs. The output sockets are internally protected against currents > 45Apeak (32Arms; the CMC 356 switches off with the error message "current on neutral too high").
In non-operative state, relay contacts (as illustrated in figure 5-3) protect the current amplifier from external power by shortening the outputs to N.
Caution: If there is an in-feed from an external source, the current outputs can be damaged or destroyed.
Overload Warning Flagged in the Software
When a current output is overloaded, a corresponding warning is displayed in the user interface of the test software of the OMICRON Test Universe.
Please see also section 7.1, "Safety Instructions for High Current Output" on page 93.

Setup and Function

4.1.3
Figure 4-4: Binary/analog inputs 1 - 10

Binary / Analog Input (Binary Inputs 1 - 10)

The ten binary inputs are divided into five groups of two, each group galvanically separated from the others. If the hardware option ELT-1 is installed, all inputs can be configured individually by the software as binary or analog measurement inputs (refer to section 6.10, "Option ELT-1" on page 68).
The input signals are monitored with a time resolution of 100 µs and then evaluated in the CPU.
The binary inputs are configured from the Hardware Configuration module of the OMICRON Test Universe software. When doing so, it can be specified whether the contacts are potential-sensitive or not. When the contacts are potential-sensitive, the expected nominal voltage and pick-up threshold can be set for each binary input.
Moreover, the binary inputs 1 10 can be used as counter inputs for input frequencies up to 3 kHz.
More detailed information about the configuration of the binary inputs can be found in the OMICRON Test Universe Help.

Figure 4-5: Binary outputs

4.1.4

Binary Output

Four binary outputs are available for use as potential-free relay contacts.
More detailed information about the configuration of the binary outputs can be found in the OMICRON Test Universe Help.

CMC 356 Reference Manual

4.1.5 AUX DC (DC Power for Test Objects)

Figure 4-6: DC power for test objects (AUX DC)

Test objects that require an auxiliary DC voltage can be fed from the AUX DC output.
The DC voltage that is applied over the AUX DC output can vary from 0 to 264 Volts and is configured using the software.
The AUX DC output is galvanically separated from all other outputs.

The power-up default

By means of the test tool AuxDC you can set a so-called power-up default. When the test set is powered-up the next time, the auxiliary DC output is automatically set to this default value. This default value applies until it is deliberately changed again.

Setting a power-up default value means, that immediately after the test set is switched on, this voltage is applied to the auxiliary DC voltage output, regardless whether a computer is connected to it or not.

Caution: The selected voltage can be life-threatening!

Consider storing a power-up default voltage of higher than 0 V a potential danger to future users that may connect other devices to this CMC test set.

We strongly recommend to always set the default value to 0 V before storing the device, or to otherwise attach a warning label to the device housing, such as "This unit outputs an AuxDC voltage of ___V immediately after powering-up".

If the voltage on the "AUX DC" output exceeds 42 V, the associated signal light lights up.

More information about the configuration of the AUX DC supply can be found in the OMICRON Test Universe AuxDC Help.

Setup and Function
4.1.6 CPU
The CMC 356 CPU (Central Processing Unit) carries out the following tasks: · Communication with the computer or a network via USB or Ethernet. · Digital signal generation for all outputs of the test set (including control
signals for external amplifiers). · Generation of a high-accuracy central clock signal with synchronization
options using either the CMGPS 588 or the CMGPS synchronization unit, or the CMIRIG-B interface box as time source. · Monitoring and control of all systems, including external amplifiers, if applicable.
4.1.7 Power Supplies (DC-DC)
An AC/DC converter generates the required DC voltage from 85 to 264 VAC supply voltage (see section 6.1) and ensures adequate EMC filtering. The power supply to the different modules, that each are part of their own galvanic groups, are implemented using DC-DC converters with reinforced insulation.
25

CMC 356 Reference Manual
4.2 Signal Generation
The generation of sine wave signals with high amplitude and phase accuracy is required in order to achieve output signals with the specified accuracy. In order to fulfill the requirement for phase-coupled signal sources, signal generation is digitally implemented. For this, the CMC 356 employs a high-performance digital signal processor (DSP). With digital signal generation the system is very flexible. An exact correction of the amplitude, offset, and phase can be carried out in a digital manner through the use of device-specific parameters (i.e., gain, offset, and null phase angle on every channel). The digital correction assures the best possible long-term drift behavior. In addition to sine waves, any other periodic or transient signal can be generated.
4.2.1 Accuracy and Signal Quality
The CMC 356 is a very precise test set with excellent long-term and temperature drift behavior. To achieve this accuracy, the philosophy was not only to solve signal generation digitally, but also to implement the distribution of signals to the various modules using digital methods. In doing so, the goal of galvanic separation of the individual generator groups was also achieved without loss of accuracy. In achieving the amplitude accuracy, the drift behavior (temperature and long-term) is of major importance in the voltage references, the digitalanalog converters (DAC), the accurate voltage dividers in the voltage amplifiers, and the current shunts in the current amplifiers. The actual (typical) data is in general about a factor of 3 better than the guaranteed data. The associated exact measurement media are required for the assurance of the accuracy in the production. The measurement media used by OMICRON are regularly calibrated by an accredited calibration institute so that tracing to international standards can be assured.
26

Connections and Interfaces

5 CONNECTIONS AND INTERFACES

5.1 Front Panel Connections

Figure 5-1: Front view of the CMC 356

AUX DC Output voltage in 3 ranges from 0 - 264 V; used to supply power to test objects.

VOLTAGE OUTPUT 4 x 300 Vrms output of the internal voltage amplifier; outputs 1 - 3 also applied to the generator combination socket.

BINARY OUTPUT Four potential-free relay contacts.

ANALOG DC INPUT (with option ELT-1 only) 0 - ±1 mA / 0 - ±20 mA: DC current inputs. 0 - ±10 V: DC voltage inputs.

Power Switch

Generator combination socket 8-pole combination socket for VOLTAGE OUTPUT 1-3 and CURRENT OUTPUT A (up to 3 × 25 A max.).

Warning indication: Dangerous Voltage!

At least one of the output voltages exceeds 42 V.

BINARY / ANALOG INPUT 10 binary inputs in 5 galvanically separated groups.
Hardware option ELT-1: The inputs can be configured as analog measurement inputs. Without option ELT-1 only binary inputs are available.

CURRENT OUTPUT
Group A: 3 x32 Arms output of the internal current amplifier; also applied to the generator combination socket.
Group B: 3 x32 Arms output of the internal current amplifier.

CMC 356 Reference Manual
Figure 5-2: Simplified circuit diagrams of binary inputs and outputs (CMC 356 standard, without option ELT-1 installed)

AUX DC

BINARY OUTPUT Software controlled

Each binary input can be configured individually for wet or dry operation.
Two inputs (1 + 2, 3 + 4, ...) are one potential group. The inputs grouped in one potential group share a common ground.

BINARY/ANALOG INPUT 3 - 10 identical

132 k Vth < 20 V: 78 k Vth > 20 V: 3.2 k
Vth

132 k 350 k

110 k
Vth 11 V

Circuit diagram of a binary input with programmable threshold voltage (wet operation)

Circuit diagram of a binary input for potential-free operation (dry)

Note: For simplified circuit diagrams of the inputs BINARY/ANALOG INPUTS and ANALOG DC INPUT of the CMC 356 with hardware option ELT-1 installed, please refer to Figure 6-19 on page 73.

Figure 5-3: Simplified diagrams of current and voltage outputs

VOLTAGE OUTPUT 4 x 300 Vrms

Connections and Interfaces

CURRENT OUTPUT A 3 x 32 Arms

CURRENT OUTPUT B 3 x 32 Arms

In non-operative state, relay contacts (as illustrated in figure 5-3) protect the current amplifier from external power by shortening the outputs to N.
29

CMC 356 Reference Manual

5.1.1
Figure 5-4: Generator combination socket

Generator Combination Socket for VOLTAGE OUTPUT and CURRENT OUTPUT
The combination socket CURRENT OUTPUT / VOLTAGE OUTPUT simplifies the connection of test objects to the CMC 356. The three voltage outputs (VOLTAGE OUTPUT 1-3) as well as the CURRENT OUTPUT A are wired to the combination socket (refer to table 5-1 on page 31).

Figure 5-5: CURRENT OUTPUT A and B wired to the combination socket

Front view

View onto the connector from the rear cable wiring side
The combination socket can also be used to connect to CURRENT OUTPUT A and B (wired in parallel).

WARNING:
The connections on the socket are dangerous when the test set is turned on. Follow the safety information provided at the beginning of this manual when connecting the generator combination sockets. If a dangerous voltage (greater than 42 V) is applied to the socket, a warning indicator lights above the socket. For currents greater than 25 A, the test object (load) should be exclusively connected to the 4 mm/0.16 " banana sockets and not on the generator connection socket.
30

Connections and Interfaces

Table 5-1: Pin layout
Table 5-2: Manufacturer ordering information

Signal

VOLTAGE N

VOLTAGE 3

VOLTAGE 2

VOLTAGE 1

CURRENT A 1

CURRENT A N

CURRENT A 3

CURRENT A 2

Note: If using negative sequence phase rotation, swap the connectors VOLTAGE 2 and VOLTAGE 3 as well as CURRENT 2 and CURRENT 3.

Description of the generator combination socket

Description

SPEAKON LINE 8-pole

Article Number NL8FC

Manufacturer Neutrik (www.neutrik.com)

You can order the plug for generator combination socket directly from OMICRON.

CMC 356 Reference Manual

5.2
Figure 5-6: Rear view of CMC 356

Connections on the Back Panel

Power supply

Fans for

Fuse T12.5 AH power supply

Interface "ext. Interf."

Status LEDs A & B "Associate" button

USB port for PC connection

4 mm/0.16 " socket for additional
PE connection*)

SELV interfaces "LL out 1 - 6" and
"LL out 7 - 12"

Ethernet ports ETH1 & ETH2 and "!" button

Fans: Current outputs (left) Voltage outputs (right)

*) For example to connect to low resistance grounding bars.

5.2.1

The SELV interface LL out 7 - 12 is optional. Please refer to section 6.11, "Option LLO-2 (Low Level Outputs)" on page 91.
USB Port
The test set's standard interface NET-1C board holds a USB port to connect the CMC 356 to your computer. To ensure the required EMC compatibility, we strongly recommend to use the OMICRON-supplied cable, only.
Note that a Test Universe software of version 3.0 (or later) plus the matching CMC firmware is required for the USB port to work.
For the technical data of the USB port, refer to 6.5.1, "The NET-1C Board" on page 63.

Connections and Interfaces

5.2.2

Ethernet Ports ETH1 and ETH2
The NET-1C board's two PoE (Power over Ethernet) ports ETH1 and ETH2 are standard 10/100Base-TX (twisted pair) Ethernet ports. They support auto crossing (auto MDI/MDIX). This means you can use a standard cable or a cross-over Ethernet patch cable.
Note: If your Ethernet ports ETH1 and ETH2 look different, i.e., ETH2 is the connector version of Fast Ethernet over optical fiber, you have a NET-1 board installed in your test set. Refer to chapter 6.5, "Technical Data of the Communication Ports" on page 63 for further information.
Since the CMC test set can be controlled over a network, any distance between the controlling computer and the test set is possible. This enables direct remote control of the CMC test set, e.g., for end-to-end testing.
The Ethernet ports also provide the basis for the processing of substation protocols according to the IEC 61850 standard. They allow flexible configurations, e.g., for separation of data traffic from different network segments or segregation of substation protocol data and test set control commands.
The green LED indicates a link connection to a PC or a network. The yellow LED indicates active traffic (receiving or transmitting) on the cable.
For detailed technical data about the Ethernet ports, please refer to section 6.5, "Technical Data of the Communication Ports" on page 63.

5.2.3
!

! Button
The ! button enables you to recover from unsuccessful software image downloads or other emergency situations. To start a new software image download, press the ! button with a pointed tool or a paper clip while powering-up the CMC. In that case, the test set will not start as usual but wait for a new software image download.

5.2.4
Associate

Associate Button
The Associate button has the following functions:
· Association with controlling computer
An Ethernet communication port enables you to communicate with any CMC available on the network. This may lead to dangerous situations where a user accidentally connects to a device located on a desk of somebody else, emitting unsafe voltages and endangering the person working there.

CMC 356 Reference Manual

5.2.5

To prevent such a situation, a special mechanism is integrated into the CMC test set that allows only "authorized" clients to control the test set. By using the Associate button, the test set is registered for use with a specific host computer.
The test set will issue voltages and currents only when it is associated to the client requesting this. The association process can be initiated by the Test Set Association and Configuration tool or by the OMICRON Device Browser. For more details about this process, refer to the Help of the according tool.
For the association the Ethernet hardware address (MAC) of the controlling computer is remembered. Consequently, if the network interface on the computer has changed, the CMC test set has to be associated whenever the MAC address changes.
· Reset IP Configuration
If the Associate button is pressed while powering up the CMC test set, the IP configuration of the network interfaces is reset to factory default, which is DHCP/AutoIP for both network interfaces. It may be necessary to reset the IP configuration in this way to recover from settings with conflicting static IP addresses.
Status LED A, B
The status LED A and B are of interest in case of troubleshooting.
A: yellow status LED · A lit yellow LED indicates that the test set is ready to be controlled by a
computer. The hardware checks in the test set are finished, and the test set is properly connected to a computer or a network.
· The LED is off when the test set is waiting for an "emergency software image download". This is the case when pressing the ! button while powering-up the CMC test set.
B: green LED If the yellow LED A is off, the green LED B signals the following conditions:
· LED B blinks slowly: CMC test set waits for the TFTP download (Trivial File Transfer Protocol) of a software image.
· LED B is lit: The TFTP download of the software image is in progress.
· LED B blinks quickly: The computer writes, e.g., the software image to the flash memory of the CMC test set. Do not turn off the CMC test set as long as the writing is in progress.

Connections and Interfaces

5.2.6

Ethernet / Network Settings
General
The OMICRON Test Universe software running on your the computer communicates with the CMC test set via a network connection. Therefore it is possible to either have the CMC directly connected to the computer's network plug by a cable or to have the CMC and the controlling computer connected to a computer network.
Both network ports can be used equally, and both network ports have link LEDs (green) and traffic LEDs (yellow flashing) to check the physical connectivity and proper cabling.
IP Configuration
For the CMC test set to communicate with the controlling computer and the OMICRON Test Universe software, TCP/IP is used. The IP parameters are set by either the Test Set Association and Configuration tool or the OMICRON Device Browser.
The CMC test set can either be set to static IP addresses or use DHCP (Dynamic Host Configuration Protocol) and AutoIP/APIPA (Automatic Private IP Addressing).
Additionally, there is a special DHCP server integrated in the CMC test set to serve IP addresses only for that computer the OMICRON Test Universe software is running on. Note that this will only take place when there is no DHCP server in the network. If there is a DHCP server in the network, the DHCP feature of the CMC test set remains inactive.
If the IP settings conflict with IP settings of other devices in the network, it is possible to reset the test set to factory defaults (DHCP and AutoIP) by pressing the Associate button at the rear of the test set while powering up the test set.
Security / Firewall Settings
To automatically detect and set the IP configuration of CMC test sets in the network, IP multicasts are used by the Test Universe software. Therefore, the firewall program has to be configured to allow communication with the CMC test sets. For the Microsoft Windows Firewall in Windows XP SP2 (or later), Windows 7 or Windows 8 the configuration of the firewall is done automatically during installation of the OMICRON Test Universe.
For instructions how to incorporate network-capable CMC test sets like the CMC 356 into a computer network, refer to the The First Steps to Get Started chapter of the Getting Started with Test Universe manual.

CMC 356 Reference Manual

Network Troubleshooting
For a complete list of ports and settings that are needed for the communication please refer to the Troubleshooting chapter of the Getting Started with Test Universe manual, subsection Firewall Configuration.
The Getting Started with Test Universe manual is available as PDF on your hard disk at installation folder\Test Universe\Doc. For languages other than English, language specific subfolders exist.
To view the manual, start the Test Universe Help from the Start Page or any test module and navigate to the table of contents entry User Manuals (at the beginning of the table of contents). Click Test Universe Software Manuals. In this topic you find a direct link at "Getting Started". To view the manual, click the link.

5.2.7

SELV Interfaces
All inputs and outputs to the SELV group (SELV = Safety Extra Low Voltage) reference to a common neutral that is internally connected to the protective earth (GND) of the housing.

5.2.7.1
ext. Interf.

External Interface ("ext. Interf.")
The SELV interface connector "ext. Interf." holds four additional transistor binary outputs (Bin. out 11 - 14). Unlike regular relay outputs, Bin. out 11 - 14 are bounce-free binary outputs (small signals) and have a minimal reaction time.
In addition, two high frequency counter inputs for up to 100 kHz are available for the testing of energy meters.
For more detailed information please refer to the technical data section 6.3.6, "Low-Level Binary Outputs ("ext. Interf.")" on page 54.
Meter Testing For energy meter test applications, the "ext. Interf." grants easy connectivity.
Synchronization Via the "ext. Interf.", the CMC 356 time base can be GPS- and IRIG-Bsynchronized. Depending on the synchronization method of your choice, use either the CMGPS synchronization unit or the CMIRIG-B interface box.

Connections and Interfaces

5.2.7.2
LL out 1 - 6

LL out 1-6 (Low Level Outputs 1-6)
The SELV interface connector "LL out 1 - 6" holds two independent generator triples. These six high accuracy analog signal sources can serve to either control an external amplifier or to directly provide small signal outputs.
In addition, a serial digital interface is available that transmits control and monitor functions between the CMC 356 and the external amplifiers. Supported devices are CMA 156, CMA 561, CMS 156, CMS 2511 and CMS 2521.
The low level outputs are short-circuit-proof and continually monitored for overload.
Connect the external amplifier to the CMC 356 low level outputs. Use the connecting cable that was supplied with the amplifier.
For more detailed information please refer to the technical data section 6.3.5, "Low Level Outputs "LL out" for External Amplifiers" on page 52.

5.2.7.3
LL out 7 - 12

LL out 7-12 (Low Level Outputs 7-12) - Option "LLO-2"
The SELV interface connector "LL out 7 - 12" is optionally available for the CMC 356 test set.
The outputs 7-12 extend the low level outputs 1-6 by two more independent generator triples. Outputs 7-12 are technically identical to outputs 1-6 as described above.
For more detailed information please refer to the technical data section 6.11, "Option LLO-2 (Low Level Outputs)" on page 91.

Overload Warning Flagged in the Software
When a low level output is overloaded, a corresponding warning message appears on the user interface of the OMICRON Test Universe software.

1 These products are not available anymore.
37

CMC 356 Reference Manual
38

Technical Data

6 TECHNICAL DATA

Table 6-1: Power supply data

6.1

Guaranteed Values:
· General: The values are valid for the period of one year after factory calibration, within 23 °C ± 5 °C at nominal value and after a warm-up time greater than 25 min.
· Guaranteed values from the generator outputs: The values are valid in the frequency range from 10 to 100 Hz unless specified otherwise. Given maximum phase errors are related to the voltage amplifier outputs.
· Accuracy data for analog outputs are valid in the frequency range from 0 to 100 Hz unless specified otherwise.
· The given input/output accuracy values relate to the range limit value (% of range limit value).
Main Power Supply

Main Power Supply Connection Voltage, single phase
nominal voltage operational range
Power fuse
Nominal current1
Frequency nominal frequency operational range
Overvoltage category

Connector according to IEC 60320
100 - 240 VAC 85 ... 264 VAC T 12.5 AH 250 V (5 x 20 mm) "Schurter", order number 0001.2515 at < 170 V: 12 A max. at > 170 V: 10 A max.
50/60 Hz 45 ... 65 Hz II

1 Refer to section 6.3.4, "Operational Limits in Conjunction with Mains Supply" on page 51.

CMC 356 Reference Manual

6.2 Insulation Coordination

Table 6-2: Insulation coordination

Insulation Coordination Overvoltage category Pollution degree Insulation of function groups on front panel to ground (GND)1
Insulation of functional groups on front panel from each other
Measurement category (BINARY / ANALOG INPUTS)

II 2 (except for Binary Inputs) - Basic insulation with maximum voltage of
600 Vrms to ground - Clearance: > 3 mm (0.12 ") - Creepage: > 6 mm (0.24 ") - Test voltage: 2200 Vrms - Working insulation - Clearance: > 1 mm (0.04 ") - Creepage: > 1 mm (0.04 ") - Test voltage: 1500 VDC - CAT III / 300 Vrms - CAT IV / 150 Vrms

1 Functional groups on CMC 356 front panel: VOLTAGE OUTPUT, CURRENT OUTPUT (A, B), AUX DC, BINARY OUTPUT, BINARY / ANALOG INPUT, ANALOG DC INPUT

Technical Data

6.3 Outputs

Table 6-3: Analog current, voltage, and LL outputs.

For block diagrams of the available generator outputs, please refer to section 4.1, "Block Diagram" on page 20.

General Generator Outputs Data

(analog current and voltage outputs, outputs "LL out")

Frequency ranges1

sinusoidal signals2

10 ... 1000 Hz

harmonics / interharmonics3 10 ... 3000 Hz

transient signals

DC ... 3.1 kHz

Frequency resolution

< 5 µHz

Frequency accuracy

± 0.5 ppm

Frequency drift

± 1 ppm

Bandwidth (3 dB)

3.1 kHz

Phase range

- 360° to + 360°

Phase resolution

0.001 °

Synchronized operation

Generator outputs can be synchronized to a reference input signal on binary/analog input 10 (range: 40 ... 70 Hz).

Temperature drift

0.0025 %/°C

1 If you purchased the option FL-6, the maximum output frequency is constrained to 599 Hz. 2 Amplitude derating for current outputs at frequencies above 380 Hz. 3 Signals above 1 kHz are only supported in selected Test Universe modules and are only
available on the voltage outputs and the low level outputs.
All voltages and current generators can independently be configured with respect to amplitude, phase angle, and frequency.
All outputs are monitored. Overload conditions result in a message displayed on the PC.

CMC 356 Reference Manual

6.3.1
Table 6-4: Extended frequency range (1 - 3 kHz)

Extended Frequency Range
In selected Test Universe modules (e.g., Harmonics and PQ Signal Generator) the CMC 356 supports a mode for generating stationary signals up to 3 kHz on the voltage outputs and the low-level outputs. This mode corrects the phase and gain errors of the output filter. The 3 dB bandwidth of this filter limits the amplitude at 3 kHz to about 70 % of the maximum range value. The application of the extended frequency range is the generation of harmonics and interharmonics.

Extended Frequency Range (1 - 3 kHz)
Low Level Outputs1 Phase error Amplitude error
Voltage Amplifier Phase error Amplitude error

Typical
< 0.25 ° < 0.25 %
< 0.25 ° < 0.25 %

Guaranteed
< 1 ° < 1 %
< 1 ° < 1 %

1 No extended frequency range support for external amplifiers.

Technical Data

6.3.2
Table 6-5: Outputs of current groups A and B
Footnotes:
1.Data for three-phase systems are valid for symmetric conditions (0 °, 120 °, 240 °) unless specified otherwise.
2. For wiring of singlephase modes see chapter 7, "Increasing the Output Power, Operating Modes" on page 93.
3.Single-phase mode (in phase opposition).
4.rd. = reading; rg. = range, whereat n % of rg. means: n % of upper range value.
5.Valid for sinusoidal signals at 50/60 Hz and
Rload 0.5 .
6.Values at 20 kHz measurement bandwidth, nominal value, and nominal load.
7.Guaranteed data at 230 V mains for ohmic loads (PF=1); typical data for inductive loads. Refer to section 6.3.4, "Operational Limits in Conjunction with Mains Supply" on page 51.
8.Current amplitude derating at frequencies above 380 Hz (see figure 6-4).
9.For currents > 25 A, connect test object only to the 4 mm/0.16 " banana connections and not to the generator combination socket.

Current Outputs

Current Outputs1 (Groups A and B)

Output currents

6-phase AC (L-N)
3-phase AC (L-N) 2-phase AC (L-L)2, 3 1-phase AC (L-L)2, 3 1-phase AC (L-L-L-L)2, 3 2-phase AC (LL-LN)2 1-phase AC (LL-LN)2 DC (LL-LN)2

6 x 0 ... 32 A (Group A and B) 3 x 0 ... 64 A (Group A + B parallel) 2 x 0 ... 32 A (Group A and B) 1 x 0 ... 64 A (Group A + B parallel) 1 x 0 ... 32 A (Group A + B in series) 2 x 0 ... 64 A (Group A and B) 1 x 0 ... 128 A (Group A + B parallel) 1 x 0 ... ±180 A (Group A + B parallel)

Power7
6-phase AC (L-N)
3-phase AC (L-N) 2-phase AC (L-L)2, 3 1-phase AC (L-L)2, 3 1-phase AC (L-L-L-L)2, 3 2-phase AC (LL-LN)2 1-phase AC (LL-LN)2 DC (LL-LN)2
Accuracy

Typical

Guaranteed

6 x 430 VA at 25 A 6 x 250 W at 20 A

3 x 860 VA at 50 A 3 x 500 W at 40 A

2 x 870 VA at 25 A 2 x 550 W at 20 A

1 x 1740 VA at 50 A 1 x 1100 W at 40 A

1 x 1740 VA at 25 A 1 x 1100 W at 20 A

2 x 500 VA at 40 A 2 x 350 W at 40 A

1 x 1000 VA at 80 A 1 x 700 W at 80 A

1 x 1400 W at ±80 A 1 x 1000 W at ±80 A

Typical

Guaranteed

Rload 0.5
Rload > 0.5
Harmonic distortion (THD+N)5,6

Error < 0.05 % rd.4 + 0.02% of rg.
Error < 0.1 % of rg.
0.05 %

Error < 0.15 % of rd. + 0.05% of rg.
Error < 0.3 % of rg. < 0.15 %

Phase error5 DC offset current Resolution

0.05 °

< 0.2 °

< 3 mA

< 10 mA

1 mA, 2 mA (2 phases parallel), ...

Frequency range8 Trigger on overload Short-circuit protection Open-circuit protection Connection
Insulation

0 ... 1000 Hz Timer accuracy error < 1 ms Unlimited Open outputs (open-circuit) permitted 4 mm/0.16 " banana connectors, amplifier connection socket9 (OUTPUT A only) Reinforced insulation of power supply and all SELV interfaces

CMC 356 Reference Manual

Figure 6-1: Guaranteed output power per phase of a group and when groups A and B are connected in parallel (active power values in W are guaranteed; apparent power values in VA are typical values)
Figure 6-2: Guaranteed single phase output power curves (active power values in W are guaranteed; apparent power values in VA are typical values)

Output power in VA / W Output Power [VA] / [W]

Output power per phase in VA / W Output Power per Phase [VA] / [W]

1000 900 800 700 600 500 400 300 200 100 0 0

S 6~ per phaassee [iVnAV]A P 6~ per phaassee [iWn W] S 3~ (A//B) pehrapsehainseV[AVA] P 3~ (A//B) pehrapsehainseW[W] P 3~ ((oonnee ttrriippllee)) ppeerr pphhaassee[iWn ]W

Output Current [ArmsO] utput current in Arms

2000 1800 1600 1400 1200 1000
800 600 400 200
0 0

S: 32A (L-L-L-L) [VA] P: 32A (L-L-L-L) [W] S: 64A (L-L) [VA] P: 64A (L-L) [W] S: 128A (LL-LN) [VA] P: 128A (LL-LN) [W]

100

Output Current [Arms]Output current in Arms

For additional information refer to section 7.2, "Single-Phase Operation of the CMC 356" on page 94.

Technical Data

Figure 6-3: Typical compliance voltage (50/60 Hz)
Figure 6-4: Current derating at high frequencies for sinusoidal signals

Max.MaxC.ucrurrreenntt i[nA]A

Compliance voltage in Vpeak Compliance Voltage [Vpeak]

160.0

140.0 120.0 100.0
80.0 60.0

1~ loww sseennssitiitvivee3322AA(L(-L-L-L)-L) 1~ higghh sseennssitiitvivee3322AA(L(-L-L-L)-L) 1~ loww sseennssitiitvivee6644AA(L(-L-/L/ /L/L-L-)L) 1~ higghh sseennssitiitvivee6644AA(L(-L-/L/ /L/L-L-)L) 1~ loww sseennssitiitvivee112288A A(L(LL-LN-L)N) 1~ higghh sseennssitiitvivee112288AA(L(LL-LN-LN// /L/LL-LL-NL)N) 6~ loww sseennssitiitvivee3322AA(L(-LN-)N) 6~ higghh sseennssitiitvivee3322AA(L(-LN-)N) 3~ loww sseennssitiitvivee6644AA(L(-LN-)N) 3~ higghh sseennssitiitvivee6644AA(L(-LN-)N)

40.0

20.0

0.0 0

100

Output Current [ArmsO] utput current in Arms

The high and low sensitive curves in figure 6-3 correspond to the overload detection sensitivity settings in the Test Universe software. The low sensitive curves show the maximum available peak compliance voltage, which is mainly relevant for testing primary and electromechanical relays.

32 28 24 20 16 12
8 4 0
0

100

200

300

400

500

600

700

800

900

1000

Frequency [Hz] Frequency in Hz

CMC 356 Reference Manual
Figure 6-5: Typical continuous output current and output power at 23 °C; single-phase mode

Continuous output power in W

Figure 6-6: Typical continuous output current and output power at 23 °C; three- and six-phase mode

Current in A

Continuous output power in W

Current in A
The continuous operating range is given by the area below the curves in the figure 6-5 and 6-6 above. If you don't require more than 64 A, we recommend to use the 1 x 64 A configuration rather than the 128 A one because the 1 x 64 A configuration provides more continuous output power. Due to the large number of operating modes, it is not possible to give universally applicable curves for the discontinuous mode. However, the examples given below can be used instead to gain feeling for the possible output durations (t1 is the possible duration of a cold device).
46

Technical Data

Table 6-6: Typical duty cycles for operation at ambient temperature of 23 °C

6 x 32 A (L-N)

duty t1 ton

[A]

[W] cycle [min] [s]

0 ... 25 0 ... 1200 100% > 30 > 1800

1400 80% 7.5

1300 75% 6.0

1200 71% 3.5

toff [s]
20 20 20

3 x 64 A (L-N)

duty t1 ton

[A]

[W] cycle [min] [s]

0 ... 50 0 ... 1200 100% > 30 > 1800

1400 80% 7.5

1300 75% 6.0

1200 71% 3.5

toff [s]
20 20 20

1 x 128 A (LL-LN)

duty t1 [min]

[A]

[W]

cycle

0 .... 80 0 ... 700 100% > 30.0

100

450

60%

4.9

120

300

43%

2.6

128

200

38%

2.0

ton [s] > 1800
30 15 12

toff [s]
0 20 20 20

CMC 356 Reference Manual

6.3.3
Table 6-7: CMC 356 voltage outputs
Footnotes:
1.a) VL4 (t) automatically calculated: VL4=(VL1+ VL2+ VL3) * C C: configurable constant from 4 to +4.
b) VL4 can be configured by software in frequency, phase, and amplitude.
2. Guaranteed data for ohmic loads, (PF=1). Refer to the accompanying figure of the output power curves. Refer to section 6.3.4, "Operational Limits in Conjunction with Mains Supply" on page 51.
3.Data for three-phase systems are valid for symmetric conditions (0 °, 120 °, 240 °).
4.Data for four-phase systems are valid for symmetric conditions (0 °, 90 °, 180 °, 270 °).
5.rd. = reading; rg. = range, whereat n % of rg. means: n % of upper range value.
6.Valid for sinusoidal signals at 50/60 Hz.
7. 20 kHz measurement bandwidth, nominal value, and nominal load.
8. If you purchased the option FL-6, the maximum output frequency is constrained to 599 Hz.

Voltage Outputs

4 Voltage Outputs

Output voltages

3-phase AC (L-N) 3 x 0 ... 300 V 4-phase AC (L-N)1 4 x 0 ... 300 V

1-phase AC (L-N) 1 x 0 ... 300 V

1-phase AC (L-L) 1 x 0 ... 600 V

DC (L-N)

4 x 0 ... ± 300 V

Output power2

Typical

Guaranteed

3-phase AC3 4-phase AC4

3 x 100 VA at 100 ... 300 V 3 x 85 VA at 85 ... 300 V 4 x 75 VA at 100 ... 300 V 4 x 50 VA at 85 ... 300 V

1-phase AC (L-N) 1 x 200 VA at 100 ... 300 V 1 x 150 VA at 75 ... 300 V

1-phase AC (L-L) 1 x 275 VA at 200 ... 600 V 1 x 250 VA at 200... 600 V

DC (L-N)

1 x 420 W at 300 VDC 1 x 360 W at 300 VDC

Accuracy Harmonic distortion (THD+N)6, 7

Error < 0.03 % of rd.5 + 0.01 % of rg.
0.015 %

Error < 0.08 % of rd. + 0.02 % of rg.
< 0.05 %

Phase error6 DC offset voltage Voltage ranges
Resolution

Typical 0.02 °
< 20 mV
Range I: 0 ... 150 V Range II: 0 ... 300 V
Range I: 5 mV Range II: 10 mV

Guaranteed < 0.1 ° < 100 mV

Frequency ranges8
Short-circuit protect. Connection Insulation

Sinusoidal signals harmonics/interharm.9 transient signals

10 ... 1000 Hz 10 ... 3000 Hz DC ... 3.1 kHz

Unlimited for L - N

4 mm/0.16 " banana connectors; amplifier connection socket VL1-VL3
Reinforced insulation of power supply and all SELV interfaces

9 Signals above 1 kHz are only supported in selected software modules and are only available on the voltage outputs and the low level outputs.

Technical Data

6.3.3.1
Figure 6-7: Power diagram for three-phase operation

Power Diagram for Three-Phase Operation
typical

guaranteed

Output power per phase in VA

Output voltage in V

CMC 356 Reference Manual

6.3.3.2
Figure 6-8: Single-phase operation L-N

Power Diagram for Single-Phase Operation
Also refer to section 7.2.4, "Single-Phase Voltage" on page 97. typical
guaranteed

Output power in VA

Figure 6-9: Single-phase operation L-L

Output voltage L-N in V
typical guaranteed

Output power in VA

Output voltage L-L in V
50

Technical Data

6.3.4
Table 6-8: Typical total output power at different mains voltages.

Operational Limits in Conjunction with Mains Supply
Principally, the maximum output power of the CMC 356 is limited by the mains input supply voltage.
For mains voltages of 115 VAC or smaller, it is also possible to supply the CMC 356 with two phases (L-L) instead of the normal phase-neutral (L-N) operation in order to increase the supply voltage (115 V * sqrt(3) = 200 V).
In order to limit the internal losses and to maximize the output power of the voltage amplifier, always set the maximum test object voltage to the minimum value possible for the test.
Beside the reduction of the available total output power of low line voltages, no other significant degradations in the technical data of the CMC 356 occur.

Mains voltage 230V
115V1
100V1

Current
6 x 15 A 6 x 25 A 6 x 32 A 6 x 15 A 6 x 25 A 6 x 32 A 6 x 15 A 6 x 25 A 6 x 32 A

Typical total output power
Currents only Currents AUX DC & voltage 1600 W 1190 W + 300 W 1470 W 1060 W + 300 W 1320 W 910 W + 300 W 1120 W 710 W + 300 W 990 W 580 W + 300 W 860 W 450 W + 300 W 910 W 500 W + 300 W 790 W 380 W + 300 W 670 W 260 W + 300 W

1 After 15 min of continuous operation at full output power a duty cycle of 15 min on/15 min off is required at an ambient temperature of 25°C. This does not apply to the 6 x 32 A example because the output duration is limited by the current amplifier (see Chapter 6.3.2, "Current Outputs" on page 43 for more details).

CMC 356 Reference Manual

6.3.5
Table 6-9: Pin assignment of "LL out 1-6" (lower 16-pole Lemo socket); view onto the connector from the cable wiring side. The pin assignment of "LL out 7-12" socket is identical.

Low Level Outputs "LL out" for External Amplifiers
Note: The low-level outputs "LL out 7 - 12" are only available, if the option LLO-2 is installed.
Both SELV interface connectors "LL out 1 - 6" as well as the optional "LL out 7 - 12" (if applicable) hold two independent generator triples each. These six high accuracy analog signal sources per connector can serve to either control an external amplifier or to directly provide small signal outputs.
In addition, each SELV interface connector provides a serial digital interface (pins 8-16; see below) that transmits control and monitor functions between the CMC 356 and the external amplifiers. Supported devices are the CMA 156, CMA 561, CMS 156, CMS 2511 and CMS 2521.
The low level outputs are short-circuit-proof and continually monitored for overload. They are separated through reinforced insulation from the power input and from the load outputs (SELV interface). They deliver calibrated signals in the range from 0 to 7 Veff nominal (0 to ± 10 Vpeak).
Both the selection of the particular amplifier as well as the specification of the range of the amplifier takes place in the Test Universe software.

3 13

16 9

Pin
1 2 3 4 5 6 7 8-16 Housing

Function LL out 1-6

Function LL out 7-12

LL out 1

LL out 7

LL out 2

LL out 8

LL out 3

LL out 9

Neutral (N) connected to GND

LL out 4

LL out 10

LL out 5

LL out 11

LL out 6

LL out 12

For internal purposes

Screen connection

"LL out 1-3" and "LL out 4-6" (and optionally "LL out 7-9" and "LL out 10-12") each make up a selectable voltage or current triple.

1 These products are not available anymore.
52

Technical Data

Table 6-10: Data for SELV outputs "LL out"
Table 6-11: Ordering Information

6 Outputs "LL out 1 - 6" and 6 (optional) outputs "LL out 7 - 12"

Output voltage range Frequency range2

0...±10 Vpeak1 0 ... 3000 Hz

Output current

Max. 1 mA

Resolution

< 250 µV

Accuracy

Typical < 0.025 %

Guaranteed < 0.07 % for 1...10 Vpeak

Harmonic distortion (THD+N)3

Typical < 0.015 %

Guaranteed < 0.05 %

Phase error4

Typical 0.02 °

Guaranteed < 0.1 °

DC offset voltage

Typical < 150 µV

Guaranteed < 1.5 mV

Unconventional CT/VT Linear or Rogowski5 mode simulation

Overload indication

Yes

Short-circuit protection Unlimited to GND

Insulation

Reinforced insulation to all other potential groups of the test equipment. GND is connected to protective earth (PE).

1 Input OMICRON amplifier nominal: 0 ... 5 Vrms 2 If you purchased the option FL-6, the maximum output frequency is constrained to 599 Hz.
3 Values at nominal voltage (10 Vpeak), 50/60 Hz, and 20 kHz measurement bandwidth. 4 Valid for sinusoidal signals at 50/60 Hz.
5 When simulating Rogowski sensors, the output voltage is proportional to the derivative of the current with respect to time (di(t)/dt).

Ordering Information
Connector for two guide notches and pull relief (for "LL out")
Black anti-bend cable cover

FGB.2B.316.CLAD 72Z GMA.2B.070 DN

For a manufacturer description about the connection sockets "LL out" and "ext. Interf.", visit the Web site www.lemo.com.

CMC 356 Reference Manual

6.3.6
Figure 6-10: Pin assignment of "ext. Interf." (upper 16-pole Lemo socket); view onto the connector from the cable wiring side

Low-Level Binary Outputs ("ext. Interf.")
The SELV interface connector "ext. Interf." holds four additional transistor binary outputs (Bin. out 11 - 14). Unlike regular relay outputs, Bin. out 11 - 14 are bounce-free binary outputs (small signals) and have a minimal reaction time.
In addition, two high frequency counter inputs for up to 100 kHz are available for the testing of energy meters. They are described in section 6.4.2, "Counter Inputs 100 kHz (Low Level)" on page 61.

Pin Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Pin 6 Pin 7 Pin 8 Pin 9 Housing

Function Counter input 1 Counter input 2 Reserved Neutral (N) connected to GND Binary output 11 Binary output 12 Binary output 13 Binary output 14 Reserved Screen connection

Table 6-12: Data of the low-level binary outputs 11 - 14

4 Low-Level Transistor Binary Outputs (Bin. out 11 - 14)

Type

Open-collector transistor outputs; external pull-up resistor

Switching voltage

Max. 15 V

Max. input voltage

±16 V

Switch current

Max. 5 mA (current limited); min. 100 µA

Actualization time

100 µs

Rise time

< 3 µs (Vextern = 5 V, Rpullup = 4.7 k)

Connection

Connector "ext. Interf." (CMC 356 rear side)

Insulation

Reinforced insulation to all other potential groups of the test equipment. GND is connected to protective earth (PE).

Technical Data

Figure 6-11: Circuit diagram of "ext. Interf." binary
transistor outputs 11 - 14

22 k 6.8 k

Rear side of CMC 356
Vextern = 5 ... 15 V

Inside of CMC 356

Rpullup

16 V

Binary outputs 11 ... 14 "ext. Interf."

Table 6-13: Ordering Information

Ordering Information
Connector for one guide notch and pull relief (for "ext. Interf")
Black anti-bend cable cover

FGG.2B.316.CLAD 72Z GMA.2B.070 DN

For a manufacturer description about the connection sockets "LL out" and "ext. Interf.", visit the Web site www.lemo.com.

CMC 356 Reference Manual

6.3.7
Table 6-14: Data of binary output relays

Binary Output Relays

4 Binary Output Relays (Binary Outputs 1-4)

Type

Potential-free contacts; software-controlled

AC loading

Vmax 300 VAC; Imax 8 A; Pmax 2000 VA

DC loading

Vmax 300 VDC; Imax 8 A; Pmax 50 W (refer to load limit curve)

Switch-on current

15 A (max. 4 s at 10 % duty-cycle)

Electrical lifetime

100 000 switching cycles at 230 VAC / 8 A and ohmic load

Pickup time

Approx. 6 ms

Fall back time

Approx. 3 ms

Bounce time

Approx. 0.5 ms

Connection

4 mm/0.16 " banana sockets

Insulation

Reinforced insulation from all SELV interfaces and from power supply.

Figure 6-12: Load limit curve for relays on the binary outputs with DC voltages

The accompanying diagram shows the load limit curve for DC voltages. For AC voltages, a maximum power of 2000 VA is achieved.

U in V / P in W

350

300

250

200

150

100

Current in A

Technical Data

6.3.8
Table 6-15: DC Voltage supply AUX DC

DC Supply (AUX DC)

DC Supply (AUX DC) Voltage ranges
Power Accuracy1 Resolution Connection Short-circuit protection Overload indication Insulation

0 ... 66 VDC (max. 0.8 A) 0 ... 132 VDC (max 0.4 A) 0 ... 264 VDC (max. 0.2 A) Max. 50 W
Error: typical < 2 %, guaranteed < 5 %
< 70 mV
4 mm/0.16 " banana sockets on front panel Yes
Yes
Reinforced insulation from power supply and all SELV interfaces

1 Percentage is with respect to each range's full-scale.

CMC 356 Reference Manual

6.4 Inputs

6.4.1
Table 6-16: General data of binary inputs

Binary Inputs
Note: If option ELT-1 is installed, only the general binary input data given in the following Table 6-16 are valid. For detailed information about the option ELT-1, please refer to section 6.10, "Option ELT-1" on page 68.

General Data of Binary Inputs 1...10

Number of binary inputs 10

Trigger criteria

Potential-free or DC-voltage compared to threshold voltage

Reaction time

Max. 220 µs

Sampling frequency

10 kHz

Time resolution

100 µs

Max. measuring time

Unlimited

Debounce time

0...25 ms (refer to page 60)

Deglitch time

0...25 ms (refer to page 60)

Counting function counter frequency pulse width

3 kHz (per input) >150 µs (for high and low signals)

Configuration

Binary inputs can be configured. Refer to the OMICRON Test Universe Help.

Connection

4 mm/0.16 " banana sockets on the front panel

Insulation

5 galvanic insulated binary groups with each 2 inputs having its own GND. Operation insulation to the power outputs, DC inputs and between galvanically separated groups. Reinforced insulation from all SELV interfaces and from power supply.

Technical Data

Table 6-17: Data for potential-sensing operation

Data for Potential-Sensing Operation

Threshold voltage data per input Setting range range

Resolution

Range I Range II

0...20V > 20...300V

50mV 500mV

Max. input voltage

CAT III/ / 300 Vrms CAT IV / 150 Vrms

Threshold voltage accuracy1

5% of rd. + 0.5% of rg.

Threshold voltage hysteresis

Range I: typ. 60 mV Range II: typ. 900 mV

Input impedance2 Threshold 0...20V Threshold 20...300V

210 k 135 k

Table 6-18: Data for potential-free operation

1 Applies to positive voltage signal edge; value shown in % of reading (rd.) + % of upper range value (rg.)
2 Refer to figure 5-2, "Simplified circuit diagrams of binary inputs and outputs (CMC 356 standard, without option ELT-1 installed)" on page 28.

Data for Potential-Free Operation1

Trigger criteria

Logical 0: R > 100 k

Logical 1: R < 10 k

Input impedance

216 k

1 Refer to figure 5-2, "Simplified circuit diagrams of binary inputs and outputs (CMC 356 standard, without option ELT-1 installed)" on page 28.

CMC 356 Reference Manual

Figure 6-13: Signal curve, deglitching input signals

Deglitching input signals In order to suppress short spurious pulses a deglitching algorithm could be configured. The deglitch process results in an additional dead time and introduces a signal delay. In order to be detected as a valid signal level, the level of an input signal must have a constant value at least during the deglitch time. The figure below illustrates the deglitch function.
Input signal

Input signal deglitched

Figure 6-14: Signal curve, debounce input signals

Tdeglitch

Debouncing input signals
For input signals with a bouncing characteristic, a debounce function can be configured. This means that the first change of the input signal causes the debounced input signal to be changed and then be kept on this signal value for the duration of the debounce time.
The debounce function is placed after the deglitch function described above and both are realized by the firmware of the CMC 356 and are calculated in real time.
The figure below illustrates the debounce function. On the right-hand side of the figure, the debounce time is too short. As a result, the debounced signal rises to "high" once again, even while the input signal is still bouncing and does not drop to low level until the expiry of another period Tdebounce.
Input signal

Input signal debounced

Tdebounce

Technical Data

6.4.2
Figure 6-15: Pin assignment of "ext. Interf." (upper 16-pole Lemo socket); view onto the connector from the cable wiring side

Counter Inputs 100 kHz (Low Level)
The SELV interface connector "ext. Interf." holds two high frequency counter inputs for up to 100 kHz are available for the testing of energy meters.
In addition, four transistor binary outputs (Bin. out 11 - 14) are available. They are described in section 6.3.6, "Low-Level Binary Outputs ("ext. Interf.")" on page 54.

Pin Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Pin 6 Pin 7 Pin 8 Pin 9 Housing

Function Counter input 1 Counter input 2 Reserved Neutral (N) connected to GND Binary output 11 Binary output 12 Binary output 13 Binary output 14 Reserved Screen connection

Table 6-19: Counter inputs 100 kHz

2 Counter Inputs Max. counter frequency Pulse width Switch threshold
pos. edge neg. edge Hysteresis Rise & fall times Max. input voltage Connection Insulation

100 kHz > 3 µs (high and low signal)
max. 8 V min. 4 V typ. 2 V < 1 ms ± 30 V Socket "ext. Interf." (rear CMC 356) Reinforced insulation to all other potential groups of the test equipment. GND is connected to protective earth (PE).

CMC 356 Reference Manual

Figure 6-16: Circuit diagram of "ext. Interf." counter inputs 1 and 2

Rear side of CMC 356

Counter inputs 1 & 2 "ext. Interf."

100 k

Inside of CMC 356
22 k
47 pF

+15 V

Table 6-20: Ordering Information

Ordering Information
Connector for one guide notch and pull relief (for "ext. Interf")
Black anti-bend cable cover

FGG.2B.316.CLAD 72Z GMA.2B.070 DN

For a manufacturer description about the connection sockets "LL out 1-6" and "ext. Interf.", visit the Web site www.lemo.com.

Technical Data

6.5 Technical Data of the Communication Ports

The first versions of the CMC 356 test sets were delivered with a NET-1 board that contained two different Ethernet ports: ETH1, a10/100Base-TX Ethernet port and ETH2, a 100Base-FX (optical fiber) Ethernet port.
With the introduction of the front panel control device CMControl, the CMC 356 test sets were then equipped with a NET-1B board that contained two identical 10/100Base-TX PoE (Power over Ethernet) Ethernet ports ETH1 and ETH2.
Today, the standard interface is the NET-1C board that, in addition to ETH1 and ETH2, provides an additional USB port.
CMC 356 test sets with NET-1 board can be upgraded with the new NET-1C board to be able to communicate with the new CMControl and have Ethernet as well as USB access at the same time.

6.5.1
Table 6-21: Technical data of the NET-1C communication ports USB and ETH1/ETH2

The NET-1C Board

NET-1C: USB port and Ethernet ports ETH1/ETH2

USB type

USB 2.0 full speed up to 12 Mbit/s

USB connector USB type B

USB cable

2 m USB 2.0 high speed type A-B

ETH type

10/100Base-TX (10/100Mbit, twisted pair, auto-MDI/MDIX or auto-crossover)

ETH connector RJ45

ETH cable type LAN cable of category 5 (CAT5) or better

ETH status indication

Green LED: physical link present Yellow LED: traffic on interface

ETH Power over Ethernet (PoE)

IEEE 802.3af compliant.
Port capability limited to one Class 1 (3.84 W) and one Class 2 (6.49 W) power device.

CMC 356 Reference Manual

6.5.2
Table 6-22: Technical data of the NET-1B communication ports ETH1 and ETH2

The NET-1B Board

NET-1B: Ethernet ports ETH1/ETH2

Type

10/100Base-TX (10/100Mbit, twisted pair, auto-MDI/MDIX or auto-crossover)

Connector

RJ45

Cable type

LAN cable of category 5 (CAT5) or better

Status indication Green LED: physical link present

Yellow LED: traffic on interface

Power over Ethernet (PoE)

IEEE 802.3af compliant.
Port capability limited to one Class 1 (3.84 W) and one Class 2 (6.49 W) power device.

6.5.3
Table 6-23: Technical data of the NET-1 communication port ETH1

The NET-1 Board

NET-1: Ethernet port ETH1 Type
Connector Cable type Status indication

10/100Base-TX (10/100Mbit, twisted pair, auto-MDI/MDIX or auto-crossover)
RJ45
LAN cable of category 5 (CAT5) or better
Green LED: physical link present
Yellow LED: traffic on interface

Technical Data

Table 6-24: Technical data of the NET-1 communication port ETH2

NET-1: Ethernet port ETH2 Type Connector Cable type
Cable length Status idication

100Base-FX (100Mbit, fiber, duplex)
MT-RJ
50/125 µm or 62.5/125 µm (duplex patch cable)
> 1 km (0.62 miles) possible
Green LED: physical link present Yellow LED: traffic on interface
This is a product of Laser Class 1 (IEC 60825)

CMC 356 Reference Manual

6.6 Environmental Conditions

Table 6-25: Climate

6.6.1 Climate

Climate Operating temperature
Storage and transportation Max. altitude Humidity Climate

0 ... +50 °C; above +30 °C a 50 % duty cycle may apply. -25 ... +70 °C 2000 m 5 ... 95% relative humidity; no condensation Tested according to IEC 60068-2-78

6.6.2
Table 6-26: Shock and vibration

Shock and Vibration

Dynamics Vibration
Shock

Tested according to IEC 60068-2-6; frequency range 10 ... 150 Hz; acceleration 2 g continuous (20 m/s²); 10 cycles per axis
Tested according to IEC 60068-2-27; 15 g / 11 ms, half-sinusoid, each axis

6.7 Mechanical Data

Table 6-27: Data regarding size and weight

Size, Weight and Protection Weight Dimensions W x H x D (without handle)
Housing

16.8 kg (37 lbs)
450 x 145 x 390 mm (17.7 x 5.7 x 15.4 ")
IP20 according to EN 60529

6.8 Cleaning

To clean the CMC 356, use a cloth dampened with isopropanol alcohol or water. Prior to cleaning, always switch off the power switch and unplug the power cord from the mains.

Technical Data

6.9 Safety Standards, Electromagnetic Compatibility (EMC) and Certificates

Table 6-28: CE conformity, certified Safety Standards and EMC-compatibility

CE Conformity, Requirements
The product adheres to the specifications of the guidelines of the council of the European Community for meeting the requirements of the member states regarding the electromagnetic compatibility (EMC) Directive 2004/108/EC and the low voltage Directive 2006/95/EC.

EMC
Emission Europe International USA
Immunity Europe International

EN 61326-1; EN 61000-6-4; EN 61000-3-2/3 IEC 61326-1; IEC 61000-6-4; IEC 61000-3-2/3 FCC Subpart B of Part 15 Class A
EN 61326-1; EN 61000-6-2; EN 61000-4-2/3/4/5/6/11 IEC 61326-1; IEC 61000-6-2; IEC 61000-4-2/3/4/5/6/11

Certified Safety Standards

Europe

EN 61010-1 Insulation of PC and SELV interfaces complies with EN 60950-1

International USA Canada

IEC 61010-1 UL 61010-1 CAN/CSA-C22.2 No 61010-1-04

Certificate

Manufactured under an ISO9001 registered system

CMC 356 Reference Manual

6.10
Figure 6-17: Binary/analog inputs and inputs for analog DC measurement

Option ELT-1

Analog DC Inputs

Binary/analog inputs
The ELT-1 option enables the CMC 356 to measure analog signals:
· Analog DC inputs (+/-10V and either +/-1mA or +/-20mA) for basic transducer testing with the test module QuickCMC.
· Basic voltage and current measurements with up to three of the 10 analog measurement inputs (restricted EnerLyzer mode).
In addition, the Test Universe module EnerLyzer provides the following functionality:
· Simultaneous measurement of up to 10 voltages and/or currents. · Evaluation of DC components (DC voltages or DC currents). · Real-time indication of effective values (true RMS) for all measurement
signals. · Peak values indication (Upeak, Ipeak,...). · Phase angles with reference to a given input signal. · Real-time calculation of apparent, reactive, and active power (in any
configuration). · Frequency and spectrum indication (harmonic diagrams) of periodic
signals. · Capturing of transient input signals with different sampling rates. · Different triggering options for transient signal capturing (basic triggers
and power quality triggers). · Trend Recording: Measurement of RMS current, RMS voltage,
frequency, phase, active, apparent and reactive power and power factor over long periods of time (up to 4 million samples possible).
68

Technical Data

Using the CMC 356 test set in combination with the Test Universe module Transducer enables advanced testing of multifunctional single-phase and three-phase electrical transducers with symmetrical or non-symmetrical operating characteristics.
The hardware option ELT-1 can either be ordered with the new test set or later as a factory upgrade (the CMC 356 needs to be returned to OMICRON).

6.10.1

General Data
The actual capturing of the measurement values and the range switching for the channels takes place in the analog input stages AFE (Analog Front End). Each AFE is used by two input channels and galvanically separated from the other input stages.
The measured values are passed through an isolation amplifier to the "Measurement Unit" and digitized by an A/D converter. The further processing is done by a high-performance floating point digital signal processor (DSP).
As such, apparent power, reactive power, active power, etc., can be provided in real-time and transmitted to the PC.
The analog measurement inputs have five measurement ranges that can be configured individually in the test module EnerLyzer.
· 100 mV
· 1V
· 10 V
· 100 V
· 600 V
These range limits refer to the respective rms values of sinusoidal input signals. The ranges 100 mV, 1 V, 10 V and 100 V can be overloaded approximately with 10 %.
Input impedance: 500 kOhm || 50 pF for all measurement ranges.
Overload protection: 600 Vrms (± 850 Vpeak) from reference potential N, from another input, or protective earth (GND).
The sampling rate can be configured by software:
· 28.44 kHz
· 9.48 kHz
· 3.16 kHz

CMC 356 Reference Manual

Four different operating modes are possible: · Multimeter Mode (section 6.10.6) · Harmonic Analysis (section 6.10.7) · Transient Recording (section 6.10.8) · Trend Recording (section 6.10.9)

6.10.2
Figure 6-18: DC measurement unit (analog inputs VDC, IDC)

Analog DC Input (VDC, IDC)

The measurement of analog DC signals has been implemented to enable the testing of transducers. The measurement unit consists of
· a highly accurate voltage reference,
· one ADC (Analog Digital Converter) for each input, and
· the respective input circuits (i.e., accurate voltage divider, shunt, filter).
The DC measurement unit measures the input signals VDC and IDC and performs the evaluation and forwarding of the measurement values.
Input IDC has two measurement ranges: 0 ... ± 20 mA and 0 ... ± 1mA. The input is protected by a reversible input fuse. The inputs VDC and IDC reference a common neutral N. The DC measurement unit is galvanically isolated from all other connections on the front panel.

Technical Data

6.10.3
Table 6-29: DC measurement input

Accuracy of the Analog DC Input
Note: Exceeding the specified input values can damage the measurement inputs!

DC Measurement Input IDC

Measurement ranges 0 ... ±1 mA 0 ... ±20 mA

Max. input current

600 mA

Accuracy

Typical error < 0.003 % of rg.1

Guaranteed error < 0.02 % of rg.

Input impedance

Approx. 15

Connection

4 mm/0.16 " banana connectors

Insulation

Insulation to all other front panel connections. Reinforced insulation from all SELV interfaces and from power supply. Not galvanically isolated from VDC.

Table 6-30: DC voltage measurement input

1 rg. = range, whereat n % of rg. means: n % of upper range value.

DC Voltage Measurement Input VDC

Measurement range 0...± 10 V

Max. input voltage

± 11 V

Input impedance

1 M

Max. input current

± 90 mA

Accuracy

Typical error < 0.003 % of rg.

Guaranteed error < 0.02 % of rg.

Connection

4 mm/0.16 " banana connectors

Insulation

Not galvanically isolated from IDC

CMC 356 Reference Manual

6.10.4

Measuring Currents
Since the analog inputs of the CMC 356 are voltage inputs, current measurement has to be performed using suitable active current clamps with voltage outputs or shunt resistors.
OMICRON offers the C-PROBE1 as a suitable current clamp. The C-PROBE1 is not included in the scope of delivery of option ELT-1 and thus has to be ordered separately.
For further information, please contact OMICRON electronics (refer to section "OMICRON Service Centers" on page 109).

Technical Data

6.10.5
Figure 6-19: Simplified diagrams of analog and binary inputs with option ELT-1 installed

Accuracy of Binary/Analog Inputs with Option ELT-1
The technical data for the binary inputs change with the installation of option ELT-1.
ANALOG DC INPUT
Only available with option ELT-1.

PTC

1 M

0 - ±20 mA 0 - ±10 V

BINARY/ANALOG INPUT

500k

3 - 10 identical

Circuit diagram of a binary input for potential-free operation

Vin +

240 k 12V

Vin -

25 pF

500k 2.5V

Vcomp

CMC 356 Reference Manual

Table 6-31: Data for potential-sensing operation

Data for Potential-Sensing Operation

Threshold voltage data per input range

Setting range

Resolution

100 mV 1V 10 V 100 V 600 V

± 100 mV ±1V ± 10 V ± 100 V ± 600 V

2 mV 20 mV 200 mV 2V 20 V

Max. input voltage

CAT II / 600 Vrms (850 Vpk) CAT III/ / 300 Vrms CAT IV / 150 Vrms

Threshold voltage accuracy1 per range:

Error:

100 mV, 1 V, 10 V, 100 V, 600 V
Threshold voltage hysteresis:

typical < 2 %, guaranteed < 4 % typical < 5 %, guaranteed < 10 %
Typical:

100 mV, 1 V, 10 V, 100 V, 600 V
Input impedance

3.5% of range + 1.3% of setting 5.8% of range + 1.3% of setting
500 k (|| 50 pF)

Table 6-32: Data for potential-free operation

1 Valid for positive voltage signal edge; percentage is shown in respect to each range's full-scale.

Data for Potential-Free Operation1

Trigger criteria

Logical 0: R > 80 k Logical 1: R < 40 k

Input impedance

162 k (|| 50 pF)

1 Refer to figure 5-2, "Simplified circuit diagrams of binary inputs and outputs (CMC 356 standard, without option ELT-1 installed)" on page 28.

6.10.6

Multimeter Mode
This operating mode is designed for measuring steady-state signals (e.g., also non-sinusoidal shaped signals). Measurements such as rms values, phase angle, frequency, etc. can be performed. The input signals are processed in real time without delay.

Technical Data

6.10.6.1
Table 6-33: Sampling rate 28.44 kHz; measurement range 600 V, 100 V, 10 V, 1 V
Table 6-34: Sampling rate 28.44 kHz; measurement range 100 mV
Table 6-35: Sampling rate 9.48 kHz 3.16 kHz; measurement range 600 V, 100 V, 10 V, 1 V
Table 6-36: Sampling rate 9.48 kHz 3.16 kHz; measurement range 100 mV

Accuracy of AC Measurements
Conditions: integration time 1 s, measurement signal sinusoidal, excitation 10 - 100 %, accuracy references the measurement full scale values.

Frequency range
DC 10 Hz ... 100 Hz 10 Hz ... 1 kHz 10 Hz ... 10 kHz
Frequency range
DC 10 Hz ... 100 Hz 10 Hz ... 1 kHz 10 Hz ... 10 kHz
Frequency range
DC 10 Hz ... 100 Hz 10 Hz ... 1 kHz 10 Hz ... 4 kHz (sampling rate 9.48 kHz) 10 Hz ... 1.4 kHz (sampling rate 3.16 kHz)
Frequency range
DC 10 Hz ... 100 Hz 10 Hz ... 1 kHz 10 Hz ... 4 kHz (sampling rate 9.48 kHz) 10 Hz ... 1.4 kHz (sampling rate 3.16 kHz)

Accuracy Typical ± 0.15% ± 0.06% + 0.06% / -0.11% + 0.06% / -0.7%
Accuracy Typical ± 0.15% ± 0.1% + 0.15% / -0.2% + 0.15% / -1.0%
Accuracy Typical ± 0.15% ± 0.08% + 0.1% / -0.3% + 0.1% / -0.5%
+ 0.1% / -0.5%

Guaranteed ± 0.40% ± 0.15% ± 0.25% ± 1.1%
Guaranteed ± 0.45% ± 0.3% ± 0.5% ± 2%
Guaranteed ± 0.45% ± 0.2% ± 0.5% ± 1.2%
± 1.0%

Accuracy Typical ± 0.15% ± 0.1% + 0.15% / -0.35% + 0.15% / -0.6%
+ 0.15%/ -0.6%

Guaranteed ± 0.5% ± 0.35% ± 0.5% ± 1.2%
± 1.2%

CMC 356 Reference Manual

Figure 6-20: Typical frequency response with a sampling rate of 28.44 kHz and an input voltage of 70 V1

The accuracy data contains linearity, temperature, long-term drift, and frequency.

FrequeFnrceyqureenscpyoRnesspeoninsethineth1e01000VVrRaannggee

(SR =(S2R8=.4248.4k4HkzH)z)

Maximum+3Sigmamax

Minimum-3Sigmamax

0.5

Rel.REerlr.ore/rr%or in %

-0.5

-1

-1.5

-2

-2.5

Frequency / kHz Frequency in kHz

Figure 6-21: Typical frequency response with a sampling rate of 9.48 kHz and an
input voltage of 70 V1

Rel. Rerelr.oErrrionr / /%%

1 0.8 0.6 0.4 0.2
0 -0.2 -0.4 -0.6 -0.8
-1 0

Frequency reFrsepqouennscey Rinesthpoens1e0i0n tVhera10n0gVeRange (SR = 9.48(SkRH=z9).48 kHz)

Minimum-3Sigmamax Maximum+3Sigmamax

Frequency / kHz

Frequency in kHz

1 a) Relative error:

Actual - Expected Full scale

x 100 %

b) 3Sigmamax represents the maximum of the 3Sigma values of all 10 input channels. The 3Sigmamax value of an analog input are determined from 50 measurement values.

Technical Data

Figure 6-22: Typical AC linear progression at 50 Hz and a sampling rate of 28.44 kHz1

ReRl.elE.rreorrr/or% in %

1
0.04 0.03 0.02 0.01
0 -0.01 -0.02 -0.03 -0.04
0

ACAliCneLianreiatyritiyninththee 110000VVRarnagnege

Maximum+3Sigmamax Minimum-3Sigmamin

100

RMS AmplitudeA/ mV plitude (rms) in V

6.10.6.2
Table 6-37: Cross talk dampening
Table 6-38: Cross talk dampening

Channel Cross-Talk
Conditions: sinusoidal form infeed on a channel without overload, AC measurement on neighboring channel, integration time 1 s.

Measurement range Dampening in dB

600 V 100 V 10 V 1 V

105

120

100 mV 120

Cross talk dampening on channels of the same potential groups in dB at f = 50 Hz

Measurement range Dampening in dB

600 V 100 V 10 V 1 V

100 mV 95

Cross talk dampening on channels of the same potential groups in dB at f = 500 Hz
The cross-talk dampening on a neighboring channel of another potential group is greater than 120 dB in all measurement ranges (f = 50 Hz or 500 Hz).

1 a) Relative error:

Actual - Expected Full scale

x 100 %

b) 3Sigmamax represents the maximum of the 3Sigma values of all 10 input channels. The 3Sigmamax value of an analog input are determined from 50 measurement values.

CMC 356 Reference Manual

6.10.6.3
Figure 6-23: Phase error as function of input voltage

Accuracy of Phase Measurement

Phase. error in °
Phase Error / °

0,3 0,25
0,2 0,15
0,1 0,05
0 1

PhaPsheaseerErrorroraass fauFnucntciotionnooff tthheeininpputuvtovltoaglteage Phas(ePhCasHe1C-CH1H-C2H;2,raRannggee::11000V0, Vf =; 5f0=Hz5)0 Hz
10
Amplitude CH2A(Vmrmplsit)ude CH2 in Vrms

CH1:10V CH1:70V CH1:50V
100

Figure 6-24: Phase error as function of sampling rate

Conditions: integration time 1 s, measurement signal sinusoidal, measurement range 100 V, f = 50 Hz, sampling rate 28.44 kHz.

PhPhaassee.Ererrorro/r°in °

Phase erroPrhaassefuErnrocrtiaosnfuonfcttihoen osfathmepslainmgplirnagterate (fin = 50 Hz, r(fainn=g5e0H=z,1R0:1000VV))
0,4

0,35

0,3

0,215°

0,25

0,2

0,114° 0,099°

0,104° 0,063° 0,043°

0,15

0,1

0,05

0 28.44kHz

9.48kHz

3.16kHz

Sampling RaSteampling rate

0,335° 0,268° 0,224°

U = 10Vrms (R:100V) U = 20Vrms (R:100V) U = 70Vrms (R:100V

Conditions: integration time 1 s, measurement signal sinusoidal, f = 50 Hz, measurement range 100 V, both channels same excitation (20 V, 70 V).

Technical Data

Figure 6-25: Typical phase error as function of the input frequency
Table 6-39: Sampling rate and input frequency range

PhasPe.haesrerEorrr iorn/ °°

0.3 0.25
0.2 0.15
0.1 0.05
0 0

PhasePheasrreoErrraosr afus nacFtuioncntioonf oinf pFruetqfureenqcuyency (fs = 28.(4S4R =k2H8z.4,4rkaHnzg, Re: 1=001V0,0UiVn =, U20inVr=ms2)0 Vrms)

100

200

300

400

500

600

700

800

900

1000

Frequency / Hz Frequency in Hz

Conditions: integration time 1 s, measurement signal sinusoidal, sampling rate = 28.44 kHz, measurement range 100 V, excitation on both channels 20 Vrms.
The maximum input frequency for the phase measurement depends on the sampling rate.

Sampling rate 28.44 kHz 9.48 kHz 3.16 kHz

Input frequency range 10 Hz ... 2.30 kHz 10 Hz ... 750 Hz 10 Hz ... 250 Hz

Note:
1. The measurement accuracy of phase can be improved by: · increasing the integration time
· enabling the recursive averaging function
2. When measuring very small phase shifts (less than 0.2 °), the sign (positive or negative) of the measurement results can not be definitely determined. If this causes a problem, please refer to the phase measurement in the harmonic analysis.
3. For measuring phase, the input voltage should be greater than 5 % of full scale. An overload of the measurement channel does not negatively affect the obtainable accuracy.

CMC 356 Reference Manual

6.10.6.4
Figure 6-26: Error in the frequency measurement as a function of the input voltage

Accuracy of Frequency Measurement
ErroErrrionr finreFqreuqeunecnycymMeeaassuurreemmenetnatsaasFuancfutinonctoiof tnheoifntphuet vionlptaugte voltage ((mMeeaassuurereddovoevr e50r P5e0ripodesr)iods)
0,1

0,01

Rel.Rfelr.eFrqeuqeuennccyyeErrrroorr/ i%n %

Table 6-40: Sampling rate and input frequency range.

0,001 1

100

1000

Voltage sVigonaltlainge% osfigfunllarlainnge% of full range

Conditions: integration time 1 s, measurement signal sinusoid.
The maximum input frequency for the frequency measurement depends on the sampling rate.

Sampling rate 28.44 kHz 9.48 kHz 3.16 kHz

Input frequency range 10 Hz ... 1500 Hz 5 Hz ... 500 Hz 5 Hz ... 150 Hz

Conditions: Excitation greater than 10 % from measurement full scale, duty cycle 50 %.
Note: With the harmonic analysis, input frequencies up to 3.4 kHz can be measured.

Technical Data

6.10.6.5
Table 6-41: Sampling rates 28.44kHz 9.48kHz 3.16kHz Table 6-42: Sampling rate 28.44kHz

Accuracy of Power Measurement

General The power is calculated from one current channel and one voltage channel:

Active power: Apparent power:

T
P= T-1--* u(t)*i(t)dt [W]
0
S = Vrms x Irms [VA]

Reactive power: Q = S2 P2*sign_Q [var]

Urms =

T
T-1--* u(t)2dt
0

, Irms =

T
T-1--* i(t)2dt
0

Accuracies
Conditions: integration time 1s, measurement signal sinusoidal, excitation 10-100 %, accuracy references the apparent power, error of the current clamp is not taken into account.

Frequency range AC 10 Hz ... 100 Hz
Frequency range AC 10 Hz ... 2.2 kHz

Power
S P Q
Power
S P Q

Accuracy1 Typical ± 0.3 % ± 0.3 % ± 0.8 %
Accuracy1 Typical + 0.3 % / - 1.2 % + 0.3 % / - 1,2 % + 0.8 % / - 2.5 %

Guaranteed ± 0.7 % ± 0.7 % ±2%
Guaranteed ± 2.5 % ± 2.5 % ± 3.5 %

1 Relative error:

Actual - Expected Full scale

S = Apparent power P = Active power Q = Reactive power

x 100 %

CMC 356 Reference Manual

Table 6-43: Sampling rate 9.48 kHz
Table 6-44: Sampling rate 3.16 kHz
Table 6-45: DC accuracy

Frequency range AC 10 Hz ... 750 Hz 10 Hz ... 750 Hz 10 Hz ... 750 Hz
Frequency range AC 10 Hz ... 250 Hz 10 Hz ... 250 Hz 10 Hz ... 250 Hz
DC

Power
S P Q
Power
S P Q
Power
P, S

Accuracy1 Typical + 0.3 % / - 0.7 % + 0.3 % / - 0.7 % + 0.8 % / - 1.2 %
Accuracy1 Typical + 0.3 % / - 0.5 % + 0.3 % / - 0.5 % + 0.8 % / - 1 %
Accuracy1 Typical ± 0.3 %

Guaranteed ± 1.8 % ± 1.8 % ± 2.5 %
Guaranteed ± 1.3 % ± 1.3 % ± 2.2 %
Guaranteed ± 0.9 %

1 Relative error:

Actual - Expected Full scale

S = Apparent power P = Active power Q = Reactive power

x 100 %

Note: The accuracy specifications include linearity, temperature, ageing drift, frequency and phase response.

Technical Data

Typical relative error as function of the excitation

Figure 6-27: Typical error of the apparent power S as function of the excitation, fs = 28.44 kHz, fin = 50 Hz

Rel. ERrrelo.r /er%ror in %

0,2 0,18 0,16 0,14 0,12
0,1 0,08 0,06 0,04 0,02
0 0

TypiTcyapl. eErrrroorraoppf aarepnptaproewnetrpSoaws earfuSncatisonfuofntchteioenxcoitfattihone excitation (f(sfs== 2288.4.44k4Hzk,Hf=z50, Hfz=) 50 Hz)

100

ExcitationECxH1c&itCaHti2o/n%CH1 & CH2 in %

phi = 1°

phi = 60°

cos phi=0.01 (89.4°)

Figure 6-28:
Typical error of the active power P as a function of the excitation considering the apparent power, fs = 28.44 kHz, fin = 50 Hz

Rel. ErrRoerl/. %error in %

0,2
0,15
0,1
0,05
0 0
-0,05

TypicTaylp.eErrrroorr roefaal pcotwiveer pPoaswaefruPnctaiosn foufnthcetieoxnciotaftitohne excitation (fs(fs==2288..444k4Hkz,Hf=z5,0Hf z=) 50 Hz)

100

ExcitationECxHc1i&taCtHio2n/ %CH1 & CH2 in %

phi = 1°

phi = 60°

cos phi=0.01 (89.4°)

CMC 356 Reference Manual

Figure 6-29: Typical error of the reactive power Q as a function of the excitation, fs = 28.44 kHz, fin = 50 Hz
Figure 6-30: Typical error1 of the reactive power Q as a function of the phase shift considering the apparent power, fs = 28.44 kHz, fin = 50 Hz, excitation CH1 and CH2 = 70 %.

Rel. ErrRoerl/. %error in %

0,3 0,25
0,2 0,15
0,1 0,05
0 0
-0,05 -0,1
-0,15

TypTicyap.l Eerrrroor rreoafctrieveapcotiwveer pQoaws ea rfuQnctaiosnfoufnthcetioexnciotaftitohne excitation (f(fss == 2288.4.44k4Hzk, fH=5z0,Hfz)= 50 Hz)

100

ExcitationECxH1c&itCaHti2o/n%CH1 & CH2 in %

phi = 1°

phi = 60°

cos phi=0.01 (89.4°)

Conditions: integration time 1s, measurement signal sinusoid, sampling rate = 28.44 kHz, fin = 50 Hz

1
TypTicyapl. Eerrrroor rreoafctrieveacpotiwveerpQoaws earfuQncatiosnfuofntchteiopnhaosef tshheiftphase shift ((ffss ==228.844.4kH4z,kfH=z5,0HfZ=) 50 Hz)

Rel. ErrRorel/.%error in %

0,5

0,4

0,3

0,2

0,1

0,2

0,3

0,4

0,5

0,6

0,7

0,8

0,9

-0,1

-0,2

-0,3

-0,4

Phase / °

Phase shift in °

Average Error

Error (+3sigm a)

Error (-3sigm a)

Conditions: integration time 1s, measurement signal sinusoidal, sampling rate = 28.44 kHz, both channels with same excitation 70 %

1 The 3Sigma values are determined from 50 measurement values.

Technical Data

Note:
· For very small phase shifts (< 0,3 °) and small excitation (< 10 %), too small integration time (< 1 s) or sampling rate 3.16 kHz, the sign of the reactive power cannot definitely be determined.
· The accuracy of the power measurement depends primarily on the accuracy of the current clamp.

6.10.7

Harmonic Analysis
This operating mode is designed for measuring stationary signals (e.g., not sinusoid shaped). The input signal is separated into fundamental and harmonic waves (Fourier Analysis).
The following items are measured:
· frequency of the fundamental wave
· amplitude of the fundamental and harmonic waves
· phase shifts between the fundamental and harmonic waves (also from the different channels)
The input signals are captured. Finally, the calculation of the measurement items is carried out. During this time, the input signal is not taken into consideration.

CMC 356 Reference Manual

6.10.7.1
Table 6-46: Sampling rate and input frequency range
Figure 6-31: Accuracy of frequency measurement as function of the voltage signal

Accuracy of Frequency Measurement
The permitted input frequency range depends on the specified sampling rate:

Sampling rate 28.44 kHz 9.48 kHz 3.16 kHz

Input frequency range 49 Hz ... 3400 Hz 17 Hz ... 1100 Hz 5 Hz ... 380 Hz

FreqFureeqnuceynyerErrroorr i/nHz%

0,05 0,04 0,03 0,02 0,01
0 -0,01 -0,02 -0,03 -0,04 -0,05
1

AcUacnuscrefaurctnayicntotiyof infnreForqfeutqheueenncvcyoylmMtaeegaaessusureirgmenmeanelt nt

Average Avg+3Sigmamax Avg-3Sigmamax

100

Voltage sVigonlatlainge% sofigfunlal rlainnge% of full range

Conditions: sampling rate 9.48 kHz, fin=20 Hz ... 1 kHz
Note: Through recursive averaging, the measurement uncertainty can be further reduced.

Technical Data

6.10.7.2
Table 6-47: Sampling rate and input frequency range
Table 6-48: Sampling rate 28.44 kHz, measurement range 600 V, 100 V, 10 V, 1 V
Table 6-49: Sampling rate 28.44 kHz, measurement range 100 mV
Table 6-50: Sampling rate 9.48 kHz 3.16 kHz, measurement range 600 V, 100 V, 10 V, 1 V

Accuracy of Amplitude Measurement
The measurement values are given as effective values (rms). The permitted input frequency range for the fundamental wave depends on the specified sampling rate:

Sampling rate 28.44 kHz 9.48 kHz 3.6 kHz

Input frequency range 100 Hz (= fmin) ... 3200 Hz 30 Hz (= fmin) ... 1000 Hz 10 Hz (= fmin) ... 350 Hz

Valid for fundamental and harmonic waves in specified frequency range; accuracy refers to full scale.

Frequency range
fmin ... 1 kHz fmin ... 10 kHz
Frequency range
fmin ... 1 kHz fmin ... 10 kHz
Frequency range
fmin ... 100 Hz fmin ... 1 kHz fmin ... 4 kHz (sampling rate = 9.48 kHz) fmin ... 1.4 kHz (sampling rate = 3.16 kHz)

Accuracy Typical ± 0.1 % + 0.1 % / - 0.7 %
Accuracy Typical ± 0.2 % + 0.2 % / - 1.0 %
Accuracy Typical ± 0.1 % + 0.1 % / - 0.5 % + 0.1 % / - 0.8 %
+ 0.1 % / - 0.8 %

Guaranteed ± 0.3 % ± 1.1 %
Guaranteed ± 0.5 % ± 2.0 %
Guaranteed ± 0.3 % ± 0.8 % ±1.2 %
±1.2 %

CMC 356 Reference Manual

Table 6-51: Sampling rate 9.48 kHz 3.16 kHz measurement range 100 mV

Frequency range
fmin ... 100 Hz fmin ... 1 kHz fmin ... 4 kHz (sampling rate = 9.48 kHz) fmin ... 1.4 kHz (sampling rate = 3.16 kHz)

Accuracy Typical ± 0.15 % ± 0.2 % / - 0.5 % + 0.2 % / - 1.0 %
+ 0.25 % / - 1.0 %

Guaranteed ± 0.4 % ± 0.8 % ± 1.5 %
± 2.0 %

6.10.7.3
Table 6-52: Sampling rate and input frequency range
Figure 6-32: Accuracy of phase measurement as function of the excitation

Accuracy of Phase Measurement
The permitted input frequency range for the fundamental wave depends on the specified sampling rate:

Sampling rate 28.44 kHz 9.48 kHz 3.16 kHz

Input frequency range 100 Hz ... 3200 Hz 30 Hz ... 1000 Hz 10 Hz ... 350 Hz

PhPahseasEreroerr/r°or in °

2.5 2
1.5 1
0.5 0
-0.5 -1
-1.5 -2
-2.5 1

UncertainAtycpchuarsaecmy eoafspurheamseentmaseaa sfuunrcetimoneonftExcitation as fu(nfsc=ti9o.4n8 okHf zt,hfein=e5x0cHizta) iton

Average Avg+3Sigmamax Avg-3Sigmamax

100

Excitation / %

Excitation in %

Conditions: sampling rate 9.48 kHz, fin = 50 Hz.
Note: Through recursive averaging, the measurement uncertainty can be reduced further.

Technical Data

6.10.8
Figure 6-33: Illustration of the relationship between trigger events, trigger delay, and recording time

Transient Recording
In this operating mode, transient signals on up to 10 input channels can be recorded synchronously.
The recording starts whenever a pre-defined trigger condition is met. The selectable trigger conditions are:
· Trigger on threshold with positive or negative edge
· Combination of different power quality triggers (sag, swell, harmonic, frequency, frequency change, notch)
In addition, a time offset for the capture window relative to the trigger event can be specified. The trigger delay can be
· positive (recording begins after the trigger event)
· or negative (recording begins already before the trigger event).

Start time for recording

Trigger event

Trigger delay (negative)

End of recording

Recording of input signals

Note: More details about triggering methods can be found in the OMICRON Test Universe Help and in the practical examples of the ELT-1 option.
The maximum length of the recording depends on the settings for the sample rate and the number of channels to be captured.

CMC 356 Reference Manual

Table 6-53: The maximum recording time depends on the number of active channels and the sampling frequency

Number of Maximum

Maximum

active

recording time [s] recording time [s] recording time [s]

channels at fs = 28.4 kHz at fs = 9.48 kHz at fs = 3.16 kHz

35.16 s

105.47 s

316.41 s

17.58 s

52.73 s

158.20 s

11.72 s

35.16 s

105.47 s

8.79 s

26.37 s

79.10 s

7.03 s

21.09 s

63.28 s

5.86 s

17.58 s

52.73 s

5.02 s

15.07 s

45.20 s

4.40 s

13.18 s

39.55 s

3.91 s

11.72 s

35.15 s

3.52 s

111

3.20 s

10.55 s 9.59 s

31.64 s 28.76 s

1 All binary inputs are stored as one channel.
Accuracy of the sampling value:
· measurement ranges 600 V, 100 V, 10 V, 1 V: ± 0.2 % typical ± 0.5 % guaranteed
· measurement range 100 mV: ± 0.3 % typical ± 0.6 % guaranteed
The accuracy data are full scale errors.

6.10.9

Trend Recording
In Trend Recording Mode, you can make a historical plot of various measurements over time. It is possible to measure RMS voltage, RMS current, phase, real, apparent and reactive power and the power factor.
The main view has a CTS Chart. Each selected measurement function appears in a separate diagram (i.e. all frequency measurements in the frequency diagram). RMS current and voltage appear in separate diagrams. Time is displayed in seconds on the x-axis. The diagram is scrolled from right-to-left as new data is recorded.

Technical Data

6.11 Option LLO-2 (Low Level Outputs)

LL out 7 - 12

The LLO-2 option ("LL out 7 - 12") represents an additional SELV (SELV = Safety Extra Low Voltage) interface connector holding two independent generator triples. These six high accuracy analog signal sources can serve to either control an external amplifier or to directly provide small signal outputs.
The outputs 7-12 extend the low level outputs 1-6 ("LL out 1-6") by two more independent generator triples. Outputs 7-12 are technically identical to outputs 1-6.
For more information please refer section 6.3.5, "Low Level Outputs "LL out" for External Amplifiers" on page 52.

CMC 356 Reference Manual
92

Increasing the Output Power, Operating Modes
7 INCREASING THE OUTPUT POWER, OPERATING MODES
The CMC 356 has a very large application diversity. The current outputs offer enough output power to test all electromechanical relays. In particular, the CMC 356 offers a variety of types of single-phase operation using its two galvanically separated three-phase current outputs with which the output power from the units can be significantly increased. In cases when the current or the output power - or even the number of independent voltages or currents - is insufficient, it is possible to switch individual amplifier groups of the CMC 356 in parallel or to connect external amplifiers (up to six independent additional channels) to the "LL out 1-6". The option "LLO-2" extends the low level outputs by two more independent generator triples "LL out 7-12"; refer to section 6.11, "Option LLO-2 (Low Level Outputs)" on page 91. The operating modes illustrated in the following sections can be set in the Hardware Configuration of the OMICRON Test Universe software.
7.1 Safety Instructions for High Current Output
Observe the following safety instructions when using the operating modes and connection methods described in this chapter. · For currents greater than 25 A, the test object (load) should be
exclusively connected to the 4 mm/0.16 " banana sockets and not to the generator combination socket. · Since a current of 32 A flowing through a test lead (2 m/6 ft. of length, 2.5 mm2) causes a loss of 15 ... 18 W, we recommend to use the connection methods shown in this chapter. · When connecting current outputs in parallel, it has to be ensured that the test leads are only connected together immediately at the test object and that the test leads have sufficient diameter. · At maximum amplitude of the 128 A mode, the cable losses can amount to 112 W for AC and 280 W for DC operation. · At maximum amplitude of the 64 A mode, the cable losses can amount to 28 W for AC and 140 W for DC operation. · For applications drawing DC current: The test object (load) should be exclusively non-inductive! Note that a load of, for example, 1 Henry can store 50 J (Joule) at 10 A DC for a long period of time. Electrical shocks with more than 350 mJ can be life-hazardous for the user.
93

CMC 356 Reference Manual
7.2 Single-Phase Operation of the CMC 356
7.2.1 1 x 32 A High Burden Mode (L-L-L-L)
1 x 0 ... 32 A (±45 ADC), max. 140 Vpeak, 1 x 1740 VA at 25 A Both amplifier groups CURRENT OUTPUT A and CURRENT OUTPUT B are connected in series. The currents 1 and 2 of a group are phaseopposite. This results in four times the compliance voltage of a single output. Observe the safety instructions given in Section 7.1 on page 93 when using this operating mode.
Figure 7-1: Single-phase operation, 1 x 32 A high burden mode
Load 1'
N'
Refer to the output curves shown in the figures 6-1 through 6-5 in section 6.3.2, "Current Outputs" on page 43.
94

Increasing the Output Power, Operating Modes

7.2.2

1 x 64 A High Burden and High Current Mode (L-L)
1 x 0 ... 64 A (±90 ADC), max. 70 Vpeak, 1 x 1740 VA at 50 A
The currents 1 and 2 of each group are phase-opposite. In addition, the groups A and B are connected in parallel.
Observe the safety instructions given in Section 7.1 on page 93 when using this operating mode.

Figure 7-2: Single-phase operation, 1 x 64 A high burden and high current mode

Load 1'
N'
Refer to the output curves shown in the figures 6-1 through 6-5 in section 6.3.2, "Current Outputs" on page 43.

CMC 356 Reference Manual

7.2.3

1 x 128 A High Current Mode (LL-LN)
1 x 0 ... 128 A (±180 ADC), max. 35 Vpeak, 1 x 1000 VA at 80 A
Since the current over the N socket is limited to 32 Arms (45 ADC), the third phase is used to support the N socket. The currents 1, 2 of groups A and B are connected in parallel.
Observe the safety instructions given in Section 7.1 on page 93 when using this operating mode.

Figure 7-3: Single-phase operation, 1 x 128 A high current mode

Load 1'
N' Refer to the output curves shown in the figures 6-1 through 6-5 in section 6.3.2, "Current Outputs" on page 43.
96

Increasing the Output Power, Operating Modes

7.2.4
Figure 7-4: Single-phase operation of the voltage system (L-N)

Single-Phase Voltage
1 x 0 ... 300 V, 1 x 200 VA [100 ... 300 V] typical
Load 1'

Figure 7-5: Single-phase operation of the voltage system (L-L phase opposition)

1 x 0 ... 600 V, 1 x 275 VA [200 ... 600 V] typical

Load

Refer to the output curves shown in the figures 6-8 through 6-9 in section 6.3.3, "Voltage Outputs" on page 48.
Note: Never connect N' or any other phase to GND (PE). This can cause life-hazardous situations to persons and damage to property.

CMC 356 Reference Manual

7.3 Two-Phase Operation

For some applications it is beneficial to have two independent currents, each higher than 32 Arms, or a higher compliance voltage available.

7.3.1

2 x 64 A High Current Mode (LL-LN)
2 x 0 ... 64 A (±90 ADC), max. 35 Vpeak, 2 x 500 VA at 40 A Since the current over the N socket is limited to 32 Arms (45 ADC), the third phase is used to support the N socket. Observe the safety instructions given in Section 7.1 on page 93 when using this operating mode.

Figure 7-6: Two-phase operation, 2 x 64 A high current mode

Load 1'
N1'
2' N2'

Increasing the Output Power, Operating Modes

7.3.2

2 x 32 A High Burden Mode (L-L)
2 x 0 ... 32 A (±45 ADC), max. 70 Vpeak, 2 x 870 VA at 25 A The currents 1 and 2 of each group are phase-opposite. Observe the safety instructions given in Section 7.1 on page 93 when using this operating mode.

Figure 7-7: Two-phase operation 2 x 32 A high burden mode

Load 1'
N1'
2' N2'

CMC 356 Reference Manual
7.4 Three-Phase Current Mode with High Burden
3 x 0 ... 32 A (±45 ADC), max. 70 Vpeak, 3 x 860 VA at 25 A For loads with three separate phases it is possible to double the available compliance voltage. However, this configuration does not make sense, if a common N connector is required! Do not connect N1, N2 and N3 to each other! Observe the safety instructions given in Section 7.1 on page 93 when using this operating mode.
Figure 7-8: Three-phase operation
Load 1' N1' 2' N2' 3' N3'
100

Increasing the Output Power, Operating Modes
7.5 Operation with External Amplifiers
The connections "LL out 1-6" offer a large variety of extension possibilities. They enable the connection of external amplifiers in order to increase the number of independent voltage or current channels and thus provide the possibility to realize additional applications the CMC 356 alone cannot cover. Each LL output socket ("LL out 1-6" and the optional "LL out 7-12") can connect up to four external amplifiers with six independent channels. The following configurations are possible: · 9 × 25 Arms / 70 VA for differential relays in three galvanically separated
current triples with CMC 356 + CMA 156. · 6 × 250 V / 75 VA for the synchronization in two galvanically separated
voltage triples with CMC 356 + CMS 156. For a complete overview of the supported configurations of the CMC 356 and CMA/S amplifiers see the OMICRON Test Universe Help, topic Hardware Configuration.
101

CMC 356 Reference Manual
102

Troubleshooting
8 TROUBLESHOOTING
8.1 Troubleshooting Guide
In case of operational problems with the CMC 356 proceed as follows: 1. Consult the reference manual or the Test Universe Help. 2. Check whether the malfunction is reproducible and document it. 3. Try to isolate the malfunction by using another computer, test set or
connecting cable, if available. 4. Note the exact wording of any error message or unexpected conditions. 5. If you contact the OMICRON technical support, please attach:
· your company name as well as a phone number and e-mail address · the serial number of your test set · information about your computer: Manufacturer, type, memory,
installed printers, operating system (and language) and the installed version and language of the OMICRON Test Universe software. · screenshots or the exact wording of possible error messages. 6. If you call the OMICRON hotline, please have your computer and test set available and be prepared to repeat the steps that caused the problem. To speed up the support, please attach the following diagnostic log files: · Communication log file This file records any communication between the CMC 356 and the computer. To send the log file to the OMICRON technical support: 1. Close all other applications. 2. From the Test Universe Start Page, select Calibration & Diagnosis... and then Logfile. 3. Select Logging on (Detailed) in the Edit menu and minimize the window. 4. Start the test module and reproduce the malfunction. 5. Go back to the log file and select Send in the File menu to submit the log file via e-mail to the OMICRON technical support. · Hardware check log file Each time a test module starts, an internal hardware self-check is performed. The results of this test are stored in the hwcheck.log file. To open the log file, select Calibration & Diagnosis... and then Hardware Check from the Test Universe Start Page.
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CMC 356 Reference Manual

8.2 Potential Errors, Possible Causes, Remedies

Table 8-1: Troubleshooting the CMC 356

Some potential disruptions that may occur while operating the CMC 356 are listed below. Try to eliminate them by applying the remedies proposed here.

Error

Possible causes

Remedies

Power switch does not There is no power to light up after turning on the test set.

Check the power supply and assure that it

the CMC 356 test set.

supplies power to the

test set.

The fuse of the test set Unplug the power cord

is blown

from the power source!

Replace the fuse:

T 12.5 AH 250 V (5 x 20 mm).

Malfunction of internal Please contact the test set components OMICRON technical

support (refer to section

"OMICRON Service

Centers" on page 109).

The following message Ground-wire connection Check the ground

appears in the status to the CMC 356 is

connection.

line: "WARNING: Broken ground connection! Immediately turn off the test set! Resuming the operation can result in hazard to life and is

broken or the test set is powered by an earthfree power supply.
Note: Never connect the CMC 356 to an isolating transformer.

Ground the housing of the test set separately using the PE connection socket (on the back panel of the test set).

done at your own risk."

104

Legal Notice Concerning the OMICRON Bootloader Software
LEGAL NOTICE CONCERNING THE OMICRON BOOTLOADER SOFTWARE
The OMICRON Bootloader software includes software parts developed by: · Intel Corporation (IXP400 SW Release version 2.3) · Intrinsyc Software (Intrinsyc Bootloader) · Swedish Institute of Computer Science, Adam Dunkels (lwIP TCP/IP stack) · Mark Adler (puff - decompress the deflate data format) · Jean-loup Gailly and Mark Adler ("zlib" general purpose compression library) The following copyright notices reproduce entirely the copyright notices provided by the source code owners.
IXP400 SW Release version 2.3
Copyright (c) 2001-2005, Intel Corporation. All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions
and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of
conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. 3. Neither the name of the Intel Corporation nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. This software is provided by the copyright holders and contributors "as is" and any express or implied warranties, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose are disclaimed. In no event shall the copyright owner or contributors be liable for any direct, indirect, incidental, special, exemplary, or consequential damages (including, but not limited to, procurement of substitute goods or services; loss of use, data, or profits; or business interruption) however caused and on any theory of liability, whether in contract, strict liability, or tort(including negligence or otherwise) arising in any way out of the use of this software, even if advised of the possibility of such damage.
Intrinsyc Bootloader
Copyright (c) 2001-2002, Intrinsyc Software. All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions
and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of
conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
81

Legal Notice Concerning the OMICRON Bootloader Software

3. All advertising materials mentioning features or use of this software must display the following acknowledgement: This product includes software developed by Intrinsyc Software.
4. The name of Intrinsyc may not be used to endorse or promote products derived from this software without specific prior written permission.
This software is provided by Intrinsyc software and contributors "as is"' and any express or implied warranties, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose are disclaimed. In no event shall Intrinsyc software be liable for any direct, indirect, incidental, special, exemplary, or consequential damages (including, but not limited to, procurement of substitute goods or services; loss of use, data, or profits; or business interruption) however caused and on any theory of liability, whether in contract, strict liability, or tort (including negligence or otherwise) arising in any way out of the use of this software, even if advised of the possibility of such damage.

lwIP TCP/IP stack
Author: Adam Dunkels <adam@sics.se>
Copyright (c) 2001, 2002 Swedish Institute of Computer Science. All rights reserved.
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
3. The name of the author may not be used to endorse or promote products derived from this software without specific prior written permission.
This software is provided by the author "as is'' and any express or implied warranties, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose are disclaimed. In no event shall the author be liable for any direct, indirect, incidental, special, exemplary, or consequential damages (including, but not limited to, procurement of substitute goods or services; loss of use, data, or profits; or business interruption) however caused and on any theory of liability, whether in contract, strict liability, or tort (including negligence or otherwise) arising in any way out of the use of this software, even if advised of the possibility of such damage.

puff (Mark Adler)

This software is provided 'as-is', without any express or implied warranty. In no event will the author be held liable for any damages arising from the use of this software.

Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions:

1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.

2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.

3. This notice may not be removed or altered from any source distribution.

Mark Adler

<madler@alumni.caltech.edu>

Legal Notice Concerning the OMICRON Bootloader Software

zlib (Jean-loup Gailly and Mark Adler)

This software is provided 'as-is', without any express or implied warranty. In no event will the authors be held liable for any damages arising from the use of this software.

Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions:

2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.

3. This notice may not be removed or altered from any source distribution.

Mark Adler

<madler@alumni.caltech.edu>

Jean-loup Gailly <jloup@gzip.org>

The data format used by the zlib library is described by RFCs (Request for Comments) 1950 to 1952 in the files ftp://ds.internic.net/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate format) and rfc1952.txt (gzip format).

Legal Notice Concerning the OMICRON Bootloader Software
84

OMICRON Service Centers

Americas

OMICRON electronics Corp. USA 3550 Willowbend Blvd.

Houston, TX 77054, USA

Phone: Fax: Email: Web:

+1 713 830-4660 or 1 800 OMICRON +1 713 830-4661 techsupport@omicronusa.com www.omicronusa.com

Asia Pacific

OMICRON electronics Asia Ltd.

Suite 2006, 20/F, Tower 2

The Gateway, Harbour City

Kowloon, Hong Kong S.A.R.

Phone: Email: Web:

+852 3767 5500 support@asia.omicron.at www.omicron.at

Europe, Middle East, Africa

OMICRON electronics GmbH

Oberes Ried 1

6833 Klaus, Austria

Phone: Email: Web:

+43 5523 507-333 support@omicron.at www.omicron.at

For address details of other OMICRON Service Centers in your area, please visit our website www.omicron.at or www.omicronusa.com.

OMICRON Service Centers 86

Index

INDEX

Numerics
599 Hz restriction ................................... 13, 41, 48, 53
A
accuracy AC measurements ...............................................75 AUX DC supply ....................................................57 DC current measurement input ............................71 DC voltage measurement input ............................71 frequency measurement ......................................80 LL outputs (SELV) ................................................53 output power ........................................................51 phase measurement ............................................78 power measurement ............................................81 signal generation ..................................................26
active power calculation .............................................81 address OMICRON ..................................................109 altitude
max. altitude for operation ...................................66 amplifier
current amplifier (output) of CMC 356 ..................22 voltage amplifier (output) of CMC 356 .................21 apparent power calculation .........................................81

C
calibration valid period of factory calibration ......................... 39
CAN/CSA certified safety standards .................................... 67
CE certified safety standards .................................... 67
cleaning of CMC 356 ................................................. 66 connecting cables
how to use safely ................................................ 14 contact information OMICRON ................................ 109 counter inputs 100 kHz (LL) ...................................... 61 current
max. input current INPUT IDC ............................ 71 max. input current INPUT VDC ........................... 71
D
DC current measurement input ................................. 71 DC measurement (ANALOG DC INPUT) .................. 71 DC voltage measurement input ................................. 71 debouncing input signals ........................................... 60 deglitching input signals ............................................ 60 dimensions of CMC 356 ............................................ 66

B
binary inputs
general data .................................................. 58, 73
binary outputs binary output relays 1-4 .......................................56 LL binary outputs ..................................................54

111

CMC 356 Reference Manual

E
ECM-compatibility .......................................................67 electromagnetic compatibility (EMC) ..........................67 ELT-1 option ...............................................................68 e-mail OMICRON .....................................................109 EN
certified safety standards .....................................67 ETH1 of NET-1 board (technical data) .......................64
ETH1/ETH2 (technical data) ................................ 63, 64
ETH2 of NET-1 board (technical data) .......................65 Ethernet
Power over Ethernet (technical data) ...................63 external interface (ext.Interf.) .....................................54
F
FL-6 option (599 Hz restriction) .............. 13, 41, 48, 53
frequency output accuracy ....................................................41 output drift ............................................................41 output range settings ...........................................41 output resolution ..................................................41
front panel components of CMC 356 ..........................27 fuse
changing the fuse .................................................10 type ......................................................................39
G
generator combination socket voltage & current outputs .....................................30
H
Hotline ......................................................................109 housing specs of CMC 356 ........................................66

humidity, relative ........................................................ 66
I
IEC certified safety standards .................................... 67
impedance max. input impedance INPUT IDC ...................... 71 max. input impedance INPUT VDC ..................... 71
increasing output power (operating modes) .............. 93 inputs
analog DC input UDC/IDC .................................. 70
binary inputs 1-10 .......................................... 58, 73
counter input 100 kHz (LL) .................................. 61 DC measurement ................................................ 71 DC measurement (ANALOG DC INPUT) ............ 71 ISO9001 certified safety standards .................................... 67
L
LL out (SELV low level outputs) ................................. 52 LLO-2 option .............................................................. 91
M
measurement range IDC measurement input ....................................... 71 UDC measurement input ..................................... 71
N
NET-1 (technical data) ............................................... 64 NET-1B (technical data) ............................................ 64 NET-1C (technical data) ............................................ 63 nominal mains current ............................................... 39

112

Index

O
operating temperature of CMC 356 ............................66 option
ELT-1 ....................................................................68 LLO-2 ...................................................................91 options for CMC 356 (overview) .......................................12 option ELT-1 .........................................................68 output power per phase when group A || group B .....................44 voltage outputs (3-phase & single phase) ............48 outputs current output groups A & B .................................43 low-level outputs (LL out) .....................................52 serial connection CURRENT A - CURRENT B ....94 voltage (technical data) ........................................48 overload warning current amplifier ...................................................22 voltage amplifier ...................................................21
P
phase
output error .............................................43, 48, 53
output range .........................................................41 output resolution ..................................................41 PoE (Power over Ethernet, technical data) ................63 power active power calculation .......................................81 apparent power calculation ..................................81 reactive power calculation ....................................81 weak mains supply and output power (relation) ...51 power supply range of CMC 356 ................................25
R
reactive power calculation ..........................................81 relative humidity .........................................................66

resolution current outputs .................................................... 43 LL out 1-6 ............................................................ 53 phase output ....................................................... 41 voltage outputs .................................................... 48
S
safety certified safety standards .................................... 67 instructions ............................................................ 8 use of connecting cables ..................................... 14
self-test of hardware .................................................. 18 SELV
low level outputs 1-6 ........................................... 52
optional connector LL out 7-12 ...................... 12, 91
serial connection CURRENT A - CURRENT B ......... 94 shock and vibration (technical data) .......................... 66 signal generation ....................................................... 26 standards
certified safety standards .................................... 67 storage temperature .................................................. 66 supply voltage and output power (relation) ................ 51 synchronization via GPS ........................................... 36 synchronized operation ............................................. 41 system components of CMC 356 .............................. 13
T
Technical Support .................................................... 109 temperature
operating temperature of CMC 356 ..................... 66 storage temperature ............................................ 66 temperature drift of output signals ............................. 41 test hardware self-test ................................................ 18 Test Universe software ................................................ 7 Trigger on overload (current outputs) ........................ 43

113

CMC 356 Reference Manual
U
UL certified safety standards .....................................67
USB on NET-1C board (technical data) ......................63
V
vibration ......................................................................66 voltage
max. input voltage INPUT VDC ............................71 voltage outputs (technical data) ..................................48
W
weak mains supply and output power (relation) .........51 Web site OMICRON .................................................109 weight of CMC 356 .....................................................66
114

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