Rockwell Automation 1785-BCM_BEM, D17856.5.4 PLC-5 Backup Communication Module User Manual - Manual (Page 37)

Installing Your PLC-5 Backup System
Chapter 3
3-14
1. Connect one end of a 1770-CD cable to the REM I/O connector on
one of the PLC-5 programmable controllers as shown in Figure 3.8.
Figure 3.8
Remote I/O Connections Added Between PLC-5 and 1785-BCM Module
1 7 9 8 2
Local I/O Chassis Local I/O Chassis
1785-BCM module
PLC-5 processor
Remote I/O
1771-P4S
power supply
Remote I/O
HSSL was previously connected but is not shown for clarity.
Connections show default configuration with Channel 1A as Data Highway Plus and Channel 1B as Remote I/O scanner.
PLC-5 processor
1785-BCM module
1771-P4S
power supply
Blue
Shield
Clear
Blue
Shield
Clear
2. Connect the other end of the 1770-CD cable to terminals 18, 19, and
20 on the wiring arm of the 1785-BCM module in the same chassis as
shown in Figure 3.8.