Allen-Bradley 440R-S845AER-NNL MSR57P Speed Monitoring Safety Relay
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Manufacturer Rockwell / Allen Bradley
Mfg Catalog # 440R-S845AER-NNL
North Coast Part # 490868


Safety Relay Information

  • Relay Model Selected: MSR57P
  • Input: 5 x 1 N.C., 2.N.C., LC, 1 N.O. + 1 N.C.
  • Enclosure: 67.5 mm

Safety Relay Data

  • Power Supply: 24V DC
  • Auxiliary Outputs: 4 N.O. Solid State
  • Inputs: 5 x 1 N.C., 2.N.C., LC, 1 N.O. + 1 N.C.
  • Removable Terminals: Removable
  • Reset Type: Automatic/Manual or Manual Monitored
  • Housing Width: 67.5 mm


  • Provides 67.5 mm DIN Rail housing
  • Includes eight diagnostic LEDs
  • Includes six N.O. solid-state safety outputs and four solid-state auxiliary outputs
  • Includes removable terminals
  • Provides DPI configuration ports


UPC 61259854460
GTiN 00612598544608
Type Speed Monitoring, Basic Device
Applications For Monitoring of Position Switches
Mounting Type Rail
Family Brand Name Allen Bradley
Output 6 N.O Solid State
Power Supply 24V DC
Blade Dimensions 67.5 mm W x 114.5 mm D x 99 mm H
Contact Rating MP and SLS Outputs: 2A/24V DC
Enclosure 67.5 mm
Sub Brand Guardmaster

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