Rockwell Automation 1785-BCM_BEM, D17856.5.4 PLC-5 Backup Communication Module User Manual - Manual (Page 25)

Installing Your PLC-5 Backup System
Chapter 3
3-2
Figure 3.1
PLC-5 Backup System Configuration
HSSL
1771 –P4S
Power Supply
1785 –BCM Module
1771 –P4S
Power Supply
1785 –BCM Module
Local I/O Chassis Local I/O Chassis
Remote I/O
Remote I/O Chassis Remote I/O Chassis
Remote I/O
To
Data Highway Plus
Network
Data Highway Plus
17990
Remote I/O
Do not put modules for controlling your
process in local I/O chassis.
Some applications that use more than two ports (PLC-5/40, PLC-5/60, or PLC-5/80
processors) may require a 1785-BEM module (not shown).
PLC-5 processor PLC-5 processor