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Safety Function: Light Curtain and Configurable Safety Relay
open, and therefore no power is reaching the motor, which is considered a safe state. That portion of the wiring schematic is
shown below.
24V DC
Plug-in I/O
Slot 2
External Switched
Stop/Start Circuit
For the 440C-CR30 relay, Feedback Monitoring is configured as a Safety Monitoring Function (SMF) that is subsequently
associated with a Safety Output Function (SOF).
1. In the Toolbox, under Safety Monitoring Functions, click and drag Feedback Monitoring to the target block
underneath the Reset block.
Connected Components Workbench software automatically assigns the next available terminal. In this application,
the feedback monitoring circuit is wired into plug-in inputs 01 and 02, so you must change the configuration of this
SMF and the terminal assignments.
Rockwell Automation Publication SAFETY-AT138B-EN-P - May 2015
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