TB20 bus coupler, 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 system's operation (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
Dimensions (DxWxH)110 x 35 x 73 mm
WeightApprox. 115 g
CAN Transmission rate50, 100, 125, 250, 500, 800, 1000 kbps
CAN ProtocolCANopen Slave as defined in DSP301 V4.2 and DS401 V3.0
CANopen featuresNode guarding, heartbeat, SYNC, saving of the configuration
Voltage supply24 V DC, 18–30 V DC
Current drawMax. 250 mA with DC 24 V



TB20 CANopen Coupler600-160-1AA11