The IM 461-1 interface module can be inserted into the following expansion modules:

• UR1,
• UR2,
• ER1 and
• ER2.

It supplies the modules in its expansion unit with the 5 V supply voltage (max. 5 A). The power supply module is omitted here.

The module has:

• 3 LEDs for indicating faults.
• 1 interface (input) for connecting the 468-3 connecting cable of the upstream interface module.
• Coding switch for setting the number of the rack.