Rockwell Automation 1785-BCM_BEM, D17856.5.4 PLC-5 Backup Communication Module User Manual - Manual (Page 48)

Installing Your 1785-BEM Module
Chapter 4
4-5
Figure 4.3
Relays for Processor A and Processor B
PLC-5
1785-BEM 1785-BEM
1785-BEM 1785-BEM
Processor A (primary)
Processor B (primary) Processor A (secondary)
Processor B (secondary)
2A
2B
PLC-5
2A
2B
1A
1B
1785-BCM
1785-BCM
1A
1B
PLC-5
2A
2B
1A
1B
1785-BCM
PLC-5
2A
2B
1A
1B
1785-BCM
DH+/RIO
DH+/RIO
DH+/RIO
DH+/RIO
11679I
Customer Relay
The customer relay connection on the 1785-BEM module is used to switch
external devices. Relay contacts are rated at .25A at 24V DC resistive.
Loads with inductive characteristics will require additional suppression
devices.