User manual

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 ChassisLocal 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)

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 module1785-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