TB20, strain gauge weighing module | Edition 1 | 21.12.2018
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2
System overview
2.1
General
The TB20 I/O system is an open, modular, and distributed peripheral system designed to be mounted
on a 35 mm DIN rail.
It is made up of the following components:
Bus couplers
Peripheral modules
Power and isolation modules
Power modules
By using these components, you can build a custom automation system that is tailored to your
specific needs and that can have up to 64 modules connected in series to a bus coupler. All
components have a protection rating of IP20.
2.2
The components of the TB20 I/O system
2.2.1
Bus coupler
The system’s bus coupler includes a bus interface and a power module. The bus interface is responsible
for establishing a connection to the higher-level bus system and is used to exchange I/O signals with
the automation system’s CPU.
The power module is responsible for powering the coupler’s electronics and all connected peripheral
modules.
2.2.2
Peripheral modules
The system’s peripheral modules are electronic components to which peripheral devices such as
sensors and actuators can be connected. A variety of peripheral modules with different tasks and
functions are available.
Example: Peripheral module with 10-pin front connector
