Main Features

Manufacturer: Allen‑Bradley / Rockwell Automation GuardMaster MSR series
MPN: R‑PAGS‑NNR; commonly referred to as MSR Start or GuardShield safety relay
Inputs: Up to safety inputs (suitable for safety light curtains, E-stops, safety doors); supports manual or automatic/manual monitored reset modes
Outputs:
- PNP safety outputs (OSSD) rated at  mA each for direct connection to safety contactors
- auxiliary configurable outputs for diagnostics or signaling
Voltage & Power Specs:  V DC power supply; module draws approx. . W
Safety Ratings:
- EN ISO ‑ Category 
- SIL (IEC )
- IEC ‑ light curtain compatible
Diagnostics & Indicators: Features front-panel LEDs; ribbon interface enables automatic muting, blanking, and external device monitoring (EDM/start-release functionality)
Form Factor: DIN‑rail mountable, . mm width, approx.  × . ×  mm, weighing around . kg
Connection Details: Removable terminal blocks; built-in RJ port for interfacing with GuardShield Micro‑ safety light curtains

Allen-Bradley – 440R-P226AGS-NNR (MSR42) – GuardMaster Multi-Function