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SIMATIC, S7-200, S7-300, S7-400, WinCC, STEP, and S5 are registered trademarks of Siemens

Product Focus

TB20-C CanOpen Slave

TB20-C Canopen Slave head for TB20 I/O system

Includes internal Power module
Up to 64 modules per rack (Siemens ET200S only allows 12)
Hotswap module capable
Free Software Toolbox for simulation and diagnosis in addition to information available from Siemens STEP7 / TIA Portal, or WinPLC7 software.
Detailed status indication of all modules in use in the system
Fault Tracking and fault repair
Galvanic isolation between fieldbus and backplane bus

TB20-C, Bus Coupler CanOpen IO

The CANopen® bus coupler is designed to connect a CAN bus to TB20 peripheral modules.
It supports the CANopen® protocol as defined in DS 301 and uses the DSP-401 profile for digital and analog I/O modules.
A functioning TB20 configuration will always require a bus coupler and at least one peripheral module, but can accommodate up to 64 modules of any kind connected in series with the bus coupler. The bus coupler supports hot-plug for replacing modules during operation.
In addition, 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.

The 24 V power supply connector, the final bus cover, and the base module are included as standard.
TB20 ToolBox makes it easy to methodically design TB20 systems. Integrated terminal mapping, system width calculations, and Current-carrying capacity monitoring all make it possible to quickly design systems without making any mistakes.


••CANopen® protocol as defined in DSP301 and DS401
••Baud rates of 50 kbps to 1 Mbps
••24 TPDOs / 24 RPDOs
••One SDO server
••Heartbeat producer
••Two heartbeat consumers
••Node guarding
••SYNC object
••Storable parameter configuration
••Up to 64 peripheral modules
••Modules can be replaced during operation (hot-plug)
••24 VDC power supply
••Integrated power supply unit for powering peripheral modules (2.5 A)
••Supplies the system’s I/O voltage (24 VDC)
••DIP switch for setting the node ID and baud rate; can be covered
••5 LEDs, two of them bi-color
••USB device port for online diagnostics, configuring parameters, setup, and firmware updates with "TB20 ToolBox"
••TB20 ToolBox simulation for setting up the I/O system without a higher-level controller in order to test the system's operation (I/O check)