The Allen-Bradley MSR127TP 440R-N23132 Safety Relay can be connected in three different input wiring configurations: one normally closed, two normally closed, or with two PNP connections from a light curtain. When connected in the two normally closed fashion, Allen-Bradley MSR127TP 440R-N23132 Safety Relay checks for cross faults across the two inputs. When connected to light curtains, the light curtain must perform the cross fault detection.

 

The Allen-Bradley MSR127TP 440R-N23132 Safety Relay has a monitored manual reset. Allen-Bradley MSR127TP 440R-N23132 Safety Relay has an automatic/manual reset. Models with automatic/manual reset can have the reset jumpered or can be converted to an unmonitored manual reset by adding a normally open switch in the monitoring loop. Models with monitored manual reset provide checking of the output monitoring circuit.

 

The outputs include three normally open safety-rated outputs as well as one normally closed auxiliary output. The safety outputs have independent and redundant internal contacts to support the safety function. The auxiliary output is a nonsafety output intended to provide an external signal about the status of the safety outputs.

 

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