Mounting The Communications Module; Figure 4-1 Mj-4 Rear Cover; Figure 4-2 Communications Module Installation - Siemens MJ-4 Series Installation Manual

4.2 Mounting the Communications Module

Hold the communications module in place over the five standoffs on the main PCB and insert the 24-pin connector
on the ribbon cable into the 24-pin connector (P8) on the main PCB. See Figure 4-2 below. Mount the
communications module on the threaded standoffs on the main PCB using the five screws provided.

Figure 4-1 MJ-4 Rear Cover.

P8
24-Pin Connector
MJ-4 Main PCB
MJ-XL Main PCB

Figure 4-2 Communications Module Installation.

MJ-4 Communications Module
Remove 4
Case
Screws
Uncurl cable-clamp
and slide cable out
6-32 x 3/8" Screw (5)
Ribbon Cable with 24-Pin Connector
Comm Mod PCB
P9
5