Ness PS-520E Request-to-exit PIR


REX sensor with selectable pattern width, 1.2m (single door) or 2.4m (double door)

Designed for applications involving coverage at the threshold of a doorway, the PS-520E uses passive infra-red technology to detect the differential between a human body and the floor. It features several field selectable options and adjustments to make it the ideal choice for access control applications, door strike release, alarm system shunting and automatic door operation.



  • Mirror optics
  • Mounts up to 4m high
  • 12/24vac or 12/24vdc input
  • 2 x form C relays. Fail safe or Fail secure selectable
  • Adjustable sensitivity
  • Adjustable timer 0.25 to 60 seconds
  • Adjustable Coverage Area
  • Overhead or Wall mount capability
  • Dual Pyro for increased stability against external light
  • High immunity to RFI and other electrical noise
  • Suitable for Single or Double doors
  • Two “Heavy-Duty” Relay Outputs (up to 1A) for controlling Door Strikes and Magnetic Locks
  • Fail Safe/Fail Secure (selectable)
  • Compact Design


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