Profibus Bus Interface Unit

The Profibus Bus Interface Unit is a small, rugged, intelligent module with a sturdy

aluminum housing. The module has three status LEDs and a connector for a Hand-held

Programmer.

The Bus Interface Unit requires an external source of 24 VDC power.

The BIU’s internal power supply provides power for the operation of the BIU itself, and

logic power for the I/O modules connected to it.

It mounts on a separate terminal block, to which it and all field wiring are attached. The

configuration is stored in non-volatile memory located in the terminal block.

The Bus Interface Unit has a replaceable 1A, 5x20mm 250VAC slow-blow fuse on the

input power lines. The fuse can be changed without disturbing the wiring of any other

modules.