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OMRON NE1A-SCPU01 Safety Network Controller
Achieves Programmable Safety Control. Features DeviceNet Safety Master and Slave Functionality.
The OMRON NE1A-SCPU01 is a compact programmable safety circuit controller designed for industrial applications. It is certified by TÜV, CE, and cULus LISTED, meeting IEC/EN61508 (SIL3) and EN954-1 (Cat. 4) standards.
Key Features:
Operates as a compact programmable safety circuit controller.
Equipped with 16 safety inputs and 8 safety outputs.
A maximum of 128 function blocks enables easy building of safety circuits.
DeviceNet Safety Master function connects to up to 16 DeviceNet Safety Slaves.
Equipped with DeviceNet Slave function, allowing monitoring from a DeviceNet Master.
Image: A compact industrial safety network controller unit, dark gray with various input/output terminals, connectors, and indicator lights on the front panel. It has a rectangular shape with a textured surface, designed for DIN rail mounting.
11 to 25 VDC supplied via communications connector
Unit power supply voltage (VO)*
20.4 to 26.4 VDC (24 VDC -15%/+10%)
I/O power supply voltage (V1, V2)*
Current consumption
Communications power supply: 24 VDC, 15 mA
Internal circuit power supply: 24 VDC, 230 mA
Overvoltage category
II
Noise immunity
Conforms to IEC61131-2.
Vibration resistance
10 to 57 Hz: 0.35 mm, 57 to 150 Hz: 50 m/s²
Shock resistance
150 m/s²: 11 ms
Mounting method
35-mm DIN Track (IEC 60715 TH35-7.5/TH35-15)
Ambient operating temperature
-10 to 55°C
Ambient operating humidity
10% to 95% (with no condensation)
Ambient storage temperature
-40 to 70°C
Degree of protection
IEC60529 standard IP20
Serial interface
USB version 1.1
Weight
460 g max.
* VO-GO: Internal control circuit V1-G1: For external input device, test output V2-G2: For external output device
Safety Input Specifications
Input type
Sinking inputs (PNP)
ON voltage
11 VDC min. between each terminal and ground
OFF voltage
5 VDC min. between each terminal and ground
OFF current
1 mA max.
Input current
4.5 mA
Test Output Specifications
Output type
Sourcing outputs (PNP)
Rated output current
0.7 A max./output (See note.)
ON residual voltage
1.2 V max. between each output terminal and V
Leakage current
0.1 mA max.
Note: The total current when T0 to T3 are simultaneously ON is 1.4 A.
Safety Output Specifications
Output type
Sourcing outputs (PNP)
Rated output current
0.5 A max./output
ON residual voltage
1.2 V max. between each output terminal and V
Leakage current
0.1 mA max.
DeviceNet Communications Specifications
Item
Specification
Communications protocol
DeviceNet compliant
Connection form
Multi-drop system and T-branch system can be combined (for trunk line and branch lines)
Communications speed
500/250/128 kbps
Communications media
Special cable, 5 conductors (2 for communications, 2 for power supply, 1 for shielding)
Communications distance
Communications speed
Max. network length
Branch length
Total branch length
500 kbps
100 m max.
6 m max
39 m max.
250 kbps
250 m max. (100 m max.)
78 m max.
125 kbps
500 m max. (100 m max.)
156 m max.
Note: Figures in parentheses ( ) indicate values when a narrow cable is used.
Communications power supply
11 to 25 VDC
No. of connectable nodes
63
Safety I/O communications
Safety Master function
Max. no. of connections: 16
Max. data size: Input 16 bytes or output 16 bytes (per connection)
Connection type: Single-cast, multi-cast
Safety Slave function
Max. no. of connections: 4
Max. data size: Input 16 bytes or output 16 bytes (per connection)
Connection type: Single-cast, multi-cast
Standard I/O communications
Standard Slave function
Max. no. of connections: 2
Max. data size: Input 16 bytes or output 16 bytes (per connection)
Connection type: Poll, bit-strobe, COS, cyclic
Message communications
Max. message length: 552 bytes
Connections
Internal Circuit Diagram
The internal circuit diagram illustrates the connections within the NE1A-SCPU01, showing the flow from DeviceNet (V+, CAN H, DRAIN, CAN L, V-, D+, D-) through a non-insulated DC-DC converter and USB interface to the internal circuit. This circuit then branches to the Safety Input Circuit and an insulated DC-DC converter, which feeds into the Safety Output Circuit and Test Output Circuit. The outputs are connected to various terminals (V0, G0, V1, G1, T0, T3, V2, G2, IN0 to IN15, OUT0 to OUT7).
Terminal name
Description
V0
Power supply terminal for internal circuit. The two V0 terminals are internally connected.
G0
Power supply terminal for internal circuit. The two G0 terminals are internally connected.
V1
Power supply terminal for external input device and test output.
G1
Power supply terminal for external input device and test output.
V2
Power supply terminal for external output device.
G2
Power supply terminal for external output device.
IN0 to IN15
Safety input terminal.
T0 to T3
Test output terminal. Connected to IN0 to IN15 safety inputs. Each test output terminal outputs a different test pulse pattern. Terminal T3 also supports a current monitoring function for the output signal. Example: Muting lamp.
This diagram illustrates a typical emergency stop application circuit with manual reset. It shows connections from a 24 VDC power supply (E0, E1, E2) to the NE1A-SCPU01's V0 and G0 terminals. An emergency stop switch (S1) with positive opening mechanism is connected to terminals 11 and 12, and a reset switch (S2) is also included. Safety inputs (IN0-IN15) are shown connected, along with test outputs (T0-T3) and safety outputs (OUT0-OUT7). The circuit also includes contactors KM1 and KM2, with KM1-NC and KM2-NC connections, and a motor (M) controlled by KM1 and KM2. The diagram indicates the flow of signals and power within the safety system.
Color
Signal
Red
Power cable positive side (V+)
White
Communications data high side (CAN H)
Shield
Blue
Communications data low side (CAN L)
Black
Power cable negative side (V-)
Note: For details on communications specifications and wiring, refer to the DeviceNet Master Units Operation Manual (Cat. No.: W379).
Dimensions
All units are in millimeters unless otherwise indicated.
The NE1A-SCPU01 has a front view showing its terminals and indicators, with a width of 90.4 mm. The side view shows a depth of 131.4 mm and a height of 114.1 mm (overall height 111.1 mm, with a mounting height of 99 mm from the base). The top view provides an additional perspective of the unit's form factor.
Conversion Note: To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527.
Safety Precautions
⚠️ WARNING
This catalog serves as a guide for customers to select appropriate safety products. When choosing products, selecting the right ones for devices or equipment, and developing a safety-related system to fully utilize product functions, it is crucial to observe the following items.
Setting Up a Risk Assessment System
Products listed in this catalog must be used properly concerning their location, performance, and functionality. The selection and use of these products should involve a risk assessment system early in the design development stage to identify potential dangers in equipment, optimizing safety product selection. A poorly designed risk assessment system can lead to incorrect safety product choices.
Related International Standards: ISO 14121 Principles of Risk Assessment
Safety Policy
When developing a safety system for devices and equipment using safety products, efforts should be made to understand and conform to all relevant international and industrial standards.
Related International Standards: ISO 12100 Basic Concepts, General Principles for Design; IEC 61508 Functional Safety of Electrical/Electronic/Programmable Electronic Safety-related Systems
Role of Safety Products
Safety products have functions and mechanisms designed to ensure safety as defined by standards. These functions are intended to achieve their full potential within safety-related systems. Users must fully understand all functions and mechanisms to develop systems that ensure optimal usage.
Related International Standards: ISO 14119 Interlocking Devices Associated with Guards-Principles for Design and Selection
Installing Safety Products
Properly educated and trained engineers should be selected to develop safety-related systems and install safety products in devices and equipment.
Related International Standards: ISO 12100 Basic Concepts, General Principles for Design; IEC 61508 Functional Safety of Electrical/Electronic/Programmable Electronic Safety-related Systems
Observing Laws and Regulations
Safety products should conform to pertinent laws, regulations, and standards. Ensure they are used in accordance with the laws, regulations, and standards of the country where the devices and equipment incorporating these products are distributed.
Related International Standards: IEC 60204 Electrical Equipment of Machines
Observing Usage Precautions
Carefully read the specifications and precautions in this catalog and the Operating Manual provided with the product to learn usage procedures that optimize product choice. Any deviation from precautions may lead to unexpected device or equipment failure not anticipated by safety-related systems or fire originating from equipment failure.
Transferring Devices and Equipment
When transferring devices and equipment, ensure one copy of the Operating Manual is kept and another copy is packed with the device or equipment for the recipient's operational convenience.
Related International Standards: ISO 12100 Basic Concepts, General Principles for Design; IEC 61508 Functional Safety of Electrical/Electronic/Programmable Electronic Safety-related Systems
Application Considerations
OMRON is not responsible for conformity with any standards, codes, or regulations that apply to the combination of products in the customer's application or use of the product.
Upon customer request, OMRON provides applicable third-party certification documents identifying ratings and limitations of use for the products. This information alone is insufficient for a complete determination of product suitability in combination with the end product, machine, system, or other application.
Examples of applications requiring particular attention (not an exhaustive list, nor implying suitability):
Outdoor use, uses involving potential chemical contamination or electrical interference, or conditions not described in this catalog.
Nuclear energy control systems, combustion systems, railroad systems, aviation systems, medical equipment, amusement machines, vehicles, safety equipment, and installations subject to separate industry or government regulations.
Systems, machines, and equipment that could present a risk to life or property.
Users must know and observe all prohibitions of use applicable to the products.
NEVER USE THE PRODUCTS FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR PROPERTY WITHOUT ENSURING THAT THE SYSTEM AS A WHOLE HAS BEEN DESIGNED TO ADDRESS THE RISKS, AND THAT THE OMRON PRODUCT IS PROPERLY RATED AND INSTALLED FOR THE INTENDED USE WITHIN THE OVERALL EQUIPMENT OR SYSTEM.
Disclaimers
Change in Specifications
Product specifications and accessories may change based on improvements. OMRON changes model numbers when published ratings or features change significantly. However, some specifications may change without notice. For specific applications, consult an OMRON representative to confirm actual specifications.
Dimensions and Weights
Dimensions and weights are nominal and not for manufacturing purposes, even when tolerances are shown.
Errors and Omissions
Information in this catalog is believed accurate; however, no responsibility is assumed for clerical, typographical, or proofreading errors.
Performance Data
Performance data is a guide for determining suitability and does not constitute a warranty. It may represent OMRON's test conditions, and users must correlate it to actual application requirements. Actual performance is subject to the OMRON Warranty and Limitations of Liability.
Programmable Products
OMRON is not responsible for user programming of a programmable product or its consequences.
Copyright and Copy Permission
This catalog must not be copied for sales or promotions without permission. It is protected by copyright and intended solely for use with the product. Users must notify OMRON before copying or reproducing this catalog for any other purpose. If copying or transmitting this catalog to another, copy and transmit it in its entirety.
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