The IM 460-3 interface module can be inserted into the following central controllers:

• UR1,
• UR2 and
• CR2.

Up to 8 expansion units can be connected (up to 4 per interface). Up to 6 IM 460-3 units can be plugged in per central controller.

The module has:

• 3 LEDs for indicating faults.
• 2 interfaces for connecting the expansion lines via 468-1 connecting cable.