Rockwell Automation 1785-BCM_BEM, D17856.5.4 PLC-5 Backup Communication Module User Manual - Manual (Page 42)

Installing Your PLC-5 Backup System
Chapter 3
3-19
2. Connect the other end of the 1770-CD cable to terminals 12, 13, and
14 on the wiring arm of the 1785-BCM module in the same chassis as
shown in Figure 3.12.
3. Perform steps 1 and 2 for the other PLC-5 programmable controller
and 1785-BCM module.
4. Connect a 1770-CD cable to terminals 9, 10, and 11 on the wiring
arm of each 1785-BCM module as shown in Figure 3.13.
Figure 3.13
Data Highway Plus Connections Added Between 1785-BCM Modules
Local I/O Chassis Local I/O Chassis
9
10
11
9
10
11
17987
PLC-5 processor PLC-5 processor
HSSL and Remote I/O link were previously connected but are
not shown for clarity.
Connections show default configuration with Channel 1A as Data
Highway Plus and Channel 1B as Remote I/O Scanner.
1785-BCM Module
1771-P4S
Power Supply
1785-BCM Module
1771-P4S
Power Supply
Data Highway Plus
Clear
Shield
Blue
Clear
Shield
Blue