CANopen® Module with 2 Change-over and 2 Make Relay Contacts

Switching Relays via CANopen and CAN

  • Switch loads easily as a change-over switch and normally open (make) contact

  • Reliably switch up to 8 A up to 100,000 times

  • Suitable for use in the temperature range from -20°C to +60°C

CANopen® Integration according to CiA® Specifications

  • CANopen communication according to CiA specifications
  • Compatibility and interoperability with CiA 301 CANopen application layer and communication profile ensured
  • Generic I/O-module providing versatile integration capabilities with CiA 401 CANopen profile for I/O devices

Extended Switching and Error Functions

  • Simultaneous switching of up to 32 relays with one PDO / CAN frame
  • Automatic switchover to the specified state in the event of system errors

Easy to combine with other Modules of esd’s CBX Series

  • For example with modules for analog inputs or outputs.

Reliable Relay Outputs

The CAN-CBX-REL4/2 module is equipped with four relays which are electrically isolated from each other. Therefore various voltages can be applied to the CAN-CBX-REL4/2 module simultaneously. The CAN-CBX-REL4/2 module is available as successor of the CAN-CBX-REL4 module.

High-Speed CAN Interface and comprehensive LED Status Display

The module features a high-speed CAN interface compliant with ISO11898 standards. It offers electrical isolation and supports bit rates up to 1 Mbit/s. CANopen node number and the CAN bit rate are configured conveniently via coding switches.
Each relay has a dedicated LED that indicates the current state, while four additional LEDs clearly visualize the status of the CANopen node and I/O errors.

Efficient I/O Integration

Within the CBX module series, the InRailBus technology offers compact industrial CAN input/output modules. These modules feature an efficient wiring concept for CAN and supply voltage and are housed in a slim design that focuses on usability.

Advanced InRailBus Integration

The InRailBus connector (TBUS connector) simplifies the supply of power and CAN bus signals. It is seamlessly integrated into the DIN rail for user-friendly installation. At the same time, individual modules can be removed from the InRailBus without interrupting the bus signals, which enables efficient maintenance. Alternatively, power and signals can also be connected separately via the terminal connections.

Software Support

The CAN-CBX-REL4/2 comes with CANopen firmware according to CiA 301 and with a CANopen-I/O profile according to CiA 401.

CANopen Logo

esd electronics develops its products according to CiA® specifications.

Do you have special requirements regarding the product?

We are happy to provide you with a customer-specific option or adjustment to our products when purchasing appropiate quantities. Please contact our sales team for detailed information.


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Number: C.3012.04

CANopen module with 4 relay channels, designed as 2x make contact and 2x changeover contact for switching voltages up to max. 250VAC/125VDC and switching currents up to max. 8A. CANopen according to CiA 301 and CiA 401 Device Profile for Generic I/O Modules. Connectors for wire end ferrules included in the scope of delivery.

  • CiA 301 compliant
  • CiA 401 profile
  • galvanically isolated
  • CAN
  • CANopen Device
Form factor: Railmount  
  • Relay
  • CAN-Layer 2
  • CANopen
HS Code: 85176200


Number: C.1323.03

CAN cable assembly, 0.3 m length, 1 x DSUB-9 plug and 3 wire end sleeves, performance level 3, metallised plastic housing

HS Code: 85444290
Number: C.1323.04

manufactured CAN cable, length 0.3 m, 1 x DSUB-9 socket and 3 wire end sleeves, performance level 3, metallised plastic housing

HS Code: 85444290
Number: C.3000.01

In-Rail-Bus connector

Form factor: Railmount  
HS Code: 85177900
Number: C.3000.02

to connect power supply (24V) and CAN at CBX-In-Rail-Bus. socket type

Form factor: Railmount  
HS Code: 85366990
Number: C.3000.03

to connect power supply (24V) and CAN at CBX-In-Rail-Bus. plug type

HS Code: 85366990