Intelligent Modular Unit (IMU) with Withdrawable Drawer

Installation in a Withdrawable Drawer

In equipment with withdrawable drawers, the circuit breaker is found in the withdrawable drawer. The IFE or IFM interface and IO modules must always be in the fixed part.

The FDM121 display can be placed in the withdrawable drawer or on the front of the drawer as shown:

Connection of the Withdrawable Drawer

The ULP connection between the fixed part and the part built into the withdrawable drawer is made with the pluggable control terminal blocks on the unit.

Withdrawable part	Fixed part

RJ45 Pin Connection of ULP Cord

The RJ45 plug/plug ULP cord uses an RJ45 connector with pin connection as follows:

Pin number	Pair number	Wire color	Assignment
Cover	Shielding	Braid	Shielding
1	Pair 1	White	Data (H)
2	Pair 1	Blue	Data (L)
3-4-5-6	–	–	Reserved
7	Pair 2	Black	0 V
8	Pair 2	Red	24 Vdc

Connection Procedure

The procedure for connecting the withdrawable drawer terminal block is as follows:

Step	Action
1	Plug the four conductors into the terminal block (removable side): Terminal 1: Connected to terminal 4 and to ground Terminal 2: White wire (L data) Terminal 3: Blue wire (H data) Terminal 5: Black wire (0 V) Terminal 6: Red wire (24 Vdc)
2	Plug the four ULP cord conductors into the terminal block on the fixed part in the same order.
3	Strip the ULP cord insulation: Close to the ULP cord end connected into the terminal block (removable side). Close to the ULP cord end connected on the fixed part.
4	Insert the wire braid into a grounding clamp at both ends of the stripped ULP cord.
5	Screw the grounding clamps on the fixed part and withdrawable part of the drawer.