TB20 Bus coupler, Modbus/TCP

The Modbus/TCP bus coupler makes it possible to access data from peripheral modules using the Modbus/TCP protocol, but can accommodate up to 64 modules of any kind connected in series with the bus coupler.
The Modbus/TCP bus coupler features an integrated two-port switch that allows for star and line topology configurations.
A large I/O image table size of 2 kbytes makes it possible to implement comprehensive and complex systems.
The control and status registers can be used to configure and monitor the coupler’s behavior with Modbus/TCP.
TB20 ToolBox can be used to easily configure the system structure and the various module parameters, and transfer the corresponding settings to the coupler.

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
Simultaneous access to up to 10 stations (TCP connections)
The coupler's behavior can be configured using control registers
The coupler's status can be read out using status registers

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TB20 Bus coupler, Modbus/TCP

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Dimensions (DxWxH)	110 x 35 x 73 mm
Weight	Approx. 115 g
Supports Modbus function codes	1, 2, 3, 4, 5, 6, 15, 16, 22, 23
TCP connection	10 stations
Voltage supply	24 V DC, 18–30 V DC
Current draw	Max. 250 mA with DC 24 V