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Customer relay – Rockwell Automation 1785-BCM_BEM, D17856.5.4 PLC-5 Backup Communication Module User Manual User Manual

Page 48

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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.