Rockwell Automation 1785-BCM_BEM, D17856.5.4 PLC-5 Backup Communication Module User Manual - Manual (Page 12)

Backup Concepts for the PLC-5 System
Chapter 1
1-4
Figure 1.1
PLC-5 Backup System Configuration Using 1785-BCM Module Only
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.
PLC-5 processor PLC-5 processor
Applications that use more than two ports (PLC-5/40, or PLC-5/60 processors)
may require a 1785-BEM module (not shown).