Allen-Bradley ProcessLogix B Series

ProcessLogix and ControlLogix System Redundancy Module 17
Publication
1757-IN092E-EN-P - November 2007
External Switchbox Connections to Logix-controller Serial Port
Line
Voltage
Primary Chassis
Secondary Chassis
1757-SRM/B
Module
User Relay
RS232
Device
External
Power
Source
Chassis Ground
Terminal
Coil
External Switchbox
One Switch per
Signal Line
NO
NC
NO
NC
Line
Voltage
1757-SRM/B
Module
User Relay
RS232
Device
Chassis Ground
Terminal
To Other RS232
Devices
Required Ferrite Core
User Relay
Terminal
Allen-Bradley Parts