Description
The ABB TU840/TB840/TB840A Optical ModuleBus Modem is a fiber optic interface to the Optical ModuleBus.
It is used to connect I/O modules to a controller or PLC over a fiber optic network. The modem has an electrical and an optical ModuleBus interface, which are logically the same bus.
- Two fiber optic ports to optical ModuleBus
- ModuleBus (electrical) to the I/O Modules
- Supervisory functions of I/O ModuleBus and power supply
- Isolated power supply to I/O modules
- Redundancy support with TU840 Module Termination Unit
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