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 number600-160-1AA11
Article nameTB20-C, CANopen slave bus coupler
Scope of deliveryBus coupler CANopen Slave, 24 V power supply connector, bus cover element, base module
Dimensions (DxWxH)73 x 35 x 110 mm
WeightApprox. 115 g
CAN interface
TypeISO/DIN 11898-2 , CAN high-speed, physical layer
Transmission rate50, 100, 125, 250, 500, 800, 1000 kbps
ProtocolCANopen Slave as defined in DSP301 V4.2 and DS401 V3.0
ConnectionConnector, SUB-D, 9-pin
FeaturesNode guarding, heartbeat, SYNC, saving of the configuration
USB interface
ProtocolFull-speed USB 1.1 device
Isolation voltage1.5 kV
Electrical isolationYes
Number of modules that can be connected in series64
Voltage supply24 VDC, 18–28 VDC
Current draw
Current draw without modules (internal)75 mA
Power supply for modules5 V DC, max 2.5 A
Power dissipationMax. 8 W
Permissible cable cross-sectionAWG 16 .. 22
Mounting positionAny
Ambient conditions
Ambient temperature0 °C … +60 °C
Transport and storage temperature-20 °C … +80 °C
Relative air humidity95 % r H without condensation
Protection ratingIP 20
CertificationsCE, UL
Surrounding Air Temperature0 °C … +50 °C
Pollution degree2
Noise immunityDIN EN 61000-6-2 “EMC Immunity"
Interference emissionDIN EN 61000-6-4 “EMC Emission”
Vibration and shock resistanceDIN EN 60068-2-6:2008 „Vibration“, DIN EN 60068-2-27:2010 „Shock"

Technical Documentation

TB20, Manual CANopen Bus Coupler 6 6 MBTB20, Manual CANopen Bus Coupler
EU Declaration of Confirmity 04-2020 55 KBEU Declaration of Confirmity


Flyer, TB20 IO-system for numerous applications 11-2017 4 MBTB20 IO-system for numerous applications


TB20-ToolBox V2 Setup V2.10.006 28 MB History TB20-ToolBox, TB20, Toolbox


TB20, USB Driver 1.20 7 KBTB20, USB Driver

Planning Tools

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 MBTB20-C, Buskoppler CANopen Slave, STEP Files

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.