Rockwell Automation 1785-BCM_BEM, D17856.5.4 PLC-5 Backup Communication Module User Manual - Manual (Page 51)

Installing Your 1785-BEM Module
Chapter 4
4-8
Figure 4.4
PLC-5 Backup System Configuration (using a 1785-BEM module)
Remote I/O Chassis No. 1 Remote I/O Chassis No. n
Local I/O Chassis Local I/O Chassis
DH+ or RIO (BEM module)
19088
HSSL
BCM DH+ or RIO
BEM RIO
BEM DH+ or RIO
BCM DH+ or RIO
DH+ or RIO (BCM module)
DH+ or RIO (BCM module)
HSSL connects between the two 1785-BCM modules only.
Do not put modules
for controlling your
process in local I/O
chassis.
Remote
I/O
(BEM
module)
1785-BCM module 1785-BEM module 1785-BCM module 1785-BEM module
PLC-5/40 or -5/60 PLC-5/40 or -5/60
1771-P4S
Power Supply 1771-P4S
Power Supply