Elvaco CMeX10 Series Users Manual

Product Overview

The CMeX10 Series makes it possible to expand your CMe Series with up to 256 extra M-Bus slaves. The CMeX10 Series features standard M-Bus over IR communication and is equipped with IR Pass Through function, making the product series stackable.

The following models are available:

• 1050009 - CMeX10 M-Bus Master 32 slaves
• 1050050 - CMeX11 M-Bus Master 64 slaves
• 1050059 - CMeX10S M-Bus Master 32 slaves
• 1050060 - CMeX11S M-Bus Master 64 slaves
• 1050051 - CMeX12S M-Bus Master 128 slaves
• 1050052 - CMeX13S M-Bus Master 256 slaves

About This Manual

This manual provides the necessary information for mounting, configuring, and using the CMeX10 Series product. It is intended for field engineers and developers.

The latest version of the documentation is available on the Elvaco website at http://www.elvaco.com.

Introduction

Product Configuration

The CMeX10 Series allows for the expansion of your CMe Series with up to 256 additional M-Bus slaves. These products feature standard M-Bus over IR communication and an IR Pass Through function for stacking. The modular and scalable design allows customers to select a level based on price and functionality.

The CMeX10S, CMeX11S, CMeX12S, and CMeX13S models also include an RS232 interface for use with standard RS232 communication devices.

Capacities

The CMeX10 Series can expand your CMe Series to manage up to 256 M-Bus slaves.

Applications

The CMeX10 Series is suitable for almost all types of meter data collection systems, including:

• Expanding CMe Series to manage up to 256 M-Bus slaves.
• Standalone M-Bus master for RS232 to two-wire M-Bus.
• Two-wire M-Bus split between two M-Bus masters using galvanic isolation via the IR pass-through function.

Physical Installation

Mounting

The product must be mounted on a DIN rail. The DIN stop (4) at the bottom facilitates mounting and dismounting from the DIN rail. For safety reasons, the DIN rail housing must cover the terminals.

Two-wire M-Bus Bus

The M-Bus is a multipoint, polarity-insensitive two-wire bus. Use a cable with a cross-section of 0.25-1.5 mm², such as a standard telephone cable (EKKX 2x2x0.25). Connect the wiring to the screw terminal (1, 2) or the direct plug-in terminal (6). Do not exceed the maximum cable length of 1000 meters (CMeX10, CMeX11) or 5000 meters (CMeX10S, CMeX11S, CMeX12S, CMeX13S).

IMPORTANT: Please consider the following points:

• CMeX10 Series products support between 32 and 256 slaves; ensure you use the correct model for your application. Bus overload will trigger the ERR indicator and shut down the M-Bus.
• All connected M-Bus slave devices must have unique primary or secondary M-Bus addresses, depending on the addressing mode used.

IR Interface with ABB Electricity Meters or CMeX Series Modules

When using the IR interface with an ABB electricity meter or another CMeX module, the IR protection (5) must be removed. The CMeX10 Series product must be mounted to the left of the ABB electricity meter. There should be no space between the CMeX10 Series product and the ABB electricity meter or other CMeX module. (Do not remove the protection if the device is not used next to an ABB electricity meter or CMeX module.)

RS232 Interface

Use the RS232 interface to use the CMeX10S, CMeX11S, CMeX12S, and CMeX13S as an M-Bus master with an RS232 to two-wire M-Bus interface. Connect the RS232 interface to the RJ45 connector (3).

Power Supply

Installation must be performed by a qualified electrician or another installer with the required knowledge. The power supply must be connected via a switch so that the device can be turned off during maintenance. The main power supply should be connected to the screw terminals (8) and (9). The main power supply voltage should be within the range of 100-240 V AC, 50/60 Hz. If a ground connection is available, connect it to the screw terminal (7).

Description of Applications

Power On

When powered on, the CMeX10 Series product performs an internal startup process before it can be used. The duration of this startup depends on the number of M-Bus slaves connected to the bus. The maximum startup time is approximately 10 seconds. During startup, the ERR indicator (red) is lit solid.

Normal/Idle Operation

In normal operation, the ERR indicator (red) is off, and the PWR indicator (green) is lit. During normal communication, the TX indicator flashes when there is communication between the ETTD and the two-wire M-Bus, and vice versa for the RX indicator when M-Bus slave devices transmit data to the ETTD.

Detection of Light Collisions (25 mA to 500 mA)

When the product detects a light slave collision, i.e., during secondary addressing, it sends a 45 ms interruption signal over the two-wire M-Bus and to the right IR interface. The product also sends an interruption signal (45 ms), parasitic characters (200 ms), and then another interruption signal (45 ms) to the ETTD (left IR interface and RS232 interface). This procedure allows for the detection of slave collisions in the ETTD even if the carrier used does not support interruption signals, i.e., TCP/IP communication.

Detection of Heavy Collisions and Short Circuits (>500 mA)

When the product detects a heavy collision, i.e., during secondary addressing or a bus short circuit, it disables the bus for 0.5 seconds. The product also sends a 45 ms interruption signal to the right IR interface and an interruption signal (45 ms), parasitic characters (200 ms), and then another interruption signal (45 ms) to the ETTD (left IR interface and RS232 interface).

High Idle Current

When the two-wire M-Bus is in an idle state and the idle current is too high (depending on the CMeX10 Series model), the product will disable the two-wire M-Bus interface and restart. The ERR indicator (red) will be lit solid in this state. This procedure will continue until the idle current is at an acceptable level for the CMeX10 Series model.

Indicator Lights

PWR Indicator (Green)

The PWR indicator (green) indicates the mains power supply.

ERR Indicator (Red)

The ERR indicator (red) indicates the status of the two-wire M-Bus.

RX Indicator (Yellow)

The RX indicator (yellow) indicates communication between the M-Bus slave and the ETTD.

TX Indicator (Yellow)

The TX indicator (yellow) indicates communication between the ETTD and the M-Bus slaves.

Troubleshooting

All Indicators Are Off

There might be a problem with the power supply. Please check the 100-240 V AC voltage. If the problem persists, the product may be defective.

Red Indicator Remains On

This indicates an error on the two-wire M-Bus. Check for short circuits on the M-Bus. The bus voltage should be between 21 and 42 V DC.

Unable to Read Connected M-Bus Slaves

Please check the M-Bus status:

• The voltage on the M-Bus slave device should be between 21 V DC and 42 V DC.
• All M-Bus slave devices must have unique primary or secondary M-Bus addresses, depending on the addressing mode.
• Check the baud rates of the M-Bus slave devices.

TX Indicator Remains On

When the CMeX10 Series product is stacked with other CMeX10 Series products and a short circuit occurs on a product to the left of the emitting product, the TX indicator may remain on. Check for short circuits on the products mounted to the left.

If you continue to experience problems operating your CMeX10 Series product, please contact Elvaco support; see section 1.2 Contact Information.

Technical Specifications

Type Approvals

The CMeX10 Series products are designed to comply with the directives and standards listed below.

Safety and Environment

Safety Precautions

The following safety precautions must be observed during all phases of operation, use, maintenance, and repair of a CMeX10 Series product. Users of the product are advised to communicate the following safety information to users and operating personnel and to integrate these instructions into all manuals provided with the product. Non-compliance with these precautions is contrary to safety standards concerning the design, manufacture, and intended use of the product. Elvaco AB assumes no responsibility for non-compliance with these precautions by the customer.

Read all instructions carefully before installing and using the CMeX10 Series product. They contain important information on the correct use of the product.

Do not begin the installation of the CMeX10 Series product until you have fully understood the technical specifications. The work must be carried out in the order indicated in this manual, and only by qualified personnel. The work must also be carried out in accordance with national electrical specifications and applicable local regulations.

To avoid damaging the product from static electricity, wear an ESD wrist strap when handling the product.

To avoid dangerous power levels, the two-wire M-Bus cable must be disconnected from the M-Bus master or other installations.

The product is intended to be permanently connected to the M-Bus master using the two-wire M-Bus cable. The two-wire cable of the M-Bus master must have the correct dimensions and, if necessary, it must be possible to disconnect the product from the two-wire cable.

The product labeling must not be modified, removed, or rendered illegible.

The symbol □ indicates that the product belongs to insulation class II and does not require a protective earth. The product is equipped with double insulation.

Document History

Software and Hardware of the Document

CMeX10

CMeX11

CMeX10S

CMeX11S

CMeX12S

CMeX13S

References

References

• [1] EN-13757-1, EN-13757-2, EN-13757-3: Communication systems for meters and remote meter reading – Part 1, Part 2 and Part 3

Terms and Abbreviations

Numerical Representation

Decimal numbers are represented as normal numbers, i.e., 10 (ten).

Hexadecimal numbers are represented with the prefix 0x, i.e., 0x0A (ten).

Binary numbers are represented with the prefix 0b, i.e., 0b00001010 (ten).