Catalogs > Safety Products Catalog > Logic > Safety Relays > Single-Function Safety Relays > MSR121RT
MSR121RT
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Description
The Allen-Bradley Guardmaster Minotaur MSR121RT is a safety monitoring relay that provides three normally open safety contacts, a normally open auxiliary contact and a solid state auxiliary output for use with interfacing to PLCs.
The MSR121RT has a versatile input arrangement. It can be connected to a single or dual channel safety gate or e-stop, a safety mat input or a light curtain that provides cross fault detection.
Reset and output monitoring is determined by the wiring configuration. Automatic/manual reset can use a jumper or can be used to check operation of external contactors. Monitored manual requires the use of a manually operated normally open momentary switch.
The MSR121RT has 3 normally open safety rated outputs. The safety outputs have independent and redundant internal contacts to help ensure the safety function. It has one normally closed auxiliary output as well as a solid state PNP auxiliary output to indicate the status of the MSR121RT to a indicator lamp or a PLC.
Features
- Category 4 per EN 954-1
- Stop category 0
- 3 Safety contacts N.O.
- 1 Auxiliary contact N.C.
- 1 Solid state PNP auxiliary contact
- Single/dual channel operation
- Cross fault monitoring
- Monitored or automatic reset
- E-stop, safety gate, safety mat or light curtain applications
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LED Indicators
| Green | Power On |
| Green | Output On |