CANopen® Module with 4 Thermocouple Interfaces

High Resolution Temperature Measurement

  • 4 high resolution and accuracy thermocouple inputs

  • Support of J, K, B, E, N, R, S and T thermocouples

  • Automatic cold junction compensation

  • CANopen profiles acc. to CiA® specification CiA 301 and CiA 404

Approved Reliability and Ease of Use

  • Electrical isolation of thermocouple interfaces: all channels are electrically isolated against the microcontroller circuits and against each other

  • InRailBus technology combines high ease of use and proven reliability

  • DIN-EN carrier rail mounting (TS 35)

Setup Options of Thermocouple Interfaces

  • Offset/Gain can be adjusted by the user

  • Voltage-only measurement also available

High Resolution Thermocouple Interfaces

The CAN-CBX-THERMO is designed for direct connection of up to four thermocouples.
Depending on the selected sample rate and the external wiring a resolution of at least 1 μV can be achieved.

For cold junction compensation the temperature of the the sensor clamp is measured by a digital temperature sensor. The conversion of the four thermocouple inputs is realized by four independent ΣΔ-converters. Linearisation according to NIST is achieved by the on board microcontroller.

CAN Interface and LED Display

The CAN interface is designed according to ISO 11898-2 high-speed layer with electrical isolation and supports bit rates up to 1 Mbit/s. The CANopen-node number and the CANbit rate can be easily set via coding switches. Four LEDs indicate the thermocouple and CANopen node status.

InRailBus for easy wiring

The power supply and the CAN bus signals can be supplied via the InRailBus connector (TBUS connector) integrated in the mounting rail. In this way, a minimum of cabling of the individual modules is achieved. All esd CBX modules are compatible with each other and can be plugged onto the bus as required. It is also possible to disconnect individual modules from the InRailBus without interrupting the bus signals or the power supply.

Software Support

The module comes with CANopen firmware according to CiA 301 and supports the CiA 404 profile for measuring devices.

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.


Software Downloads

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Number: C.3034.02

CANopen module with 4 independent, galvanically isolated channels with 24-bit Sigma-Delta ADC for high-precision temperature and voltage measurements. Suitable for thermocouples of types J, K, B, E, N, R, S or T as well as integrated cold junction compensation. CANopen according to CiA 301 and CiA 404 Device Profile Measuring Devices. Connector plug for wire end ferrules included in the scope of delivery.

  • CiA 301 compliant
  • galvanically isolated
  • CiA 404 profile
  • CAN
  • CANopen Device
Form factor: Railmount  
  • Temperature
  • 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
Number: C.3000.04

Cable housing for thermocouple inputs to improve the cold junction compensation. Phoenix Contact order information: KGG MC1,5/12

HS Code: 85389099