TB20-C, bus coupler
CANopen Slave

TB20-C, Buskoppler CANopen SlaveTB20-C, Buskoppler CANopen Slave Front
TB20-C, Buskoppler CANopen Slave
TB20-C, Buskoppler CANopen Slave Front

CANopen Slave

The CANopen bus coupler is designed to connect a CAN bus to TB20 peripheral modules.
It supports the CANopen protocol as defined in DS301 and uses the DSP-401 profile for digital and analog I/O modules.
Up to 64 modules of any kind can be connected in series with the bus coupler.
This coupler makes it possible to use SDOs to freely access all I/O values, parameters, and diagnostics, and can manage up to 192 bytes of I/O data with the PDO protocol.

A functioning TB20 configuration will always require a bus coupler and at least one peripheral module. The bus coupler supports hot-swapping for replacing modules during operation.  

  • Modules can be replaced during operation (hot-swapping)
  • 24 V DC power supply 
  • Integrated power supply unit for powering peripheral modules (2.5 A) 
  • Supplies the system’s I/O voltage (24 VDC) 
  • USB device port for online diagnostics, configuring parameters, setup, and firmware updates with "TB20 ToolBox"
  • TB20 ToolBox simulation for commissioning the I/O system without a higher-level controller in order to test the functionality (I/O check)
  • Concealed "factory reset" switch for restoring the module to its factory settings
  • CANopen protocol as defined in DSP301 and DS401
  • Transfer rates of 50 kbps to 1 Mbps
  • 24 TPDOs / 24 RPDOs
  • 1 SDO server
  • Heartbeat producer
  • Two heartbeat consumers
  • Node guarding
  • SYNC object
  • Storable parameter configuration
  • Up to 64 peripheral modules
Download PDF datasheet
General information
Order number 600-160-1AA11
Article name TB20-C, CANopen slave bus coupler
Scope of delivery Bus coupler CANopen Slave, 24 V power supply connector, bus cover element, base module
Dimensions (DxWxH) 73 x 35 x 110 mm
Weight Approx. 115 g
CAN interface
Number 1
Type ISO/DIN 11898-2 , CAN high-speed, physical layer
Transmission rate 50, 100, 125, 250, 500, 800, 1000 kbps
Protocol CANopen Slave as defined in DSP301 V4.2 and DS401 V3.0
Connection Connector, SUB-D, 9-pin
TPDOs 24
RPDOs 24
Features Node guarding, heartbeat, SYNC, saving of the configuration
USB interface
Number 1
Protocol Full-speed USB 1.1 device
Connection Mini-USB
Isolation voltage 1.5 kV
Electrical isolation Yes
Number of modules that can be connected in series 64
Voltage supply 24 VDC, 18–28 VDC
Current draw
Current draw without modules (internal) 75 mA
Power supply for modules 5 V DC, max 2.5 A
Power dissipation Max. 8 W
Permissible cable cross-section AWG 16 .. 22
Mounting position Any
Ambient conditions
Ambient temperature 0 °C … +60 °C
Transport and storage temperature -20 °C … +80 °C
Relative air humidity 95 % r H without condensation
Protection rating IP 20
Certifications CE, UL
Surrounding Air Temperature 0 °C … +50 °C
Pollution degree 2
Noise immunity DIN EN 61000-6-2 “EMC Immunity"
Interference emission DIN EN 61000-6-4 “EMC Emission”
Vibration and shock resistance DIN EN 60068-2-6:2008 „Vibration“, DIN EN 60068-2-27:2010 „Shock"

Technical Documentation

 Name Version Size Tags
TB20, Manual CANopen Bus Coupler 6 6 MB TB20, Manual CANopen Bus Coupler
EU Declaration of Confirmity 04-2020 55 KB EU Declaration of Confirmity


 Name Version Size Tags
Flyer, TB20 IO-system for numerous applications 11-2017 4 MB TB20 IO-system for numerous applications


 Name Version Size Tags
TB20-ToolBox V2 Setup V2.10.006 28 MB History TB20-ToolBox, TB20, Toolbox


 Name Version Size Tags
TB20, USB Driver 1.20 7 KB TB20, USB Driver

Planning Tools

 Name Version Size Tags
TB20, Macros for EPLAN Electric P8* from V2.0 in EDZ format 07.02.2018 84 MB
TB20, STEP files 1.00 8 MB
TB20-C, Buskoppler CANopen Slave, STEP Files 3 MB TB20-C, Buskoppler CANopen Slave, STEP Files

Declaration of consent

Read more about our privacy policy.

Spam protection

The 24 V power supply connector, the bus cover element, and the base module are included as standard.

“TB20 ToolBox” makes it easy to plan the system. Integrated terminal mapping, system width calculations, and current-carrying capacity monitoring all make it possible to quickly design systems without making any mistakes.