OS-551/OS-551T

Low Voltage Occupancy Sensor

The OS‑551 and OS‑551T are low voltage occupancy sensors designed to signal the occupancy status for area lighting, or HVAC control, for energy efficient building management.

In addition to the standard features of OS‑551, the OS‑551T further provides high/low temperature setbacks to help HVAC systems maintain room temperatures within set ranges during vacant periods.

 

  • Cutting edge dual element infrared sensor
  • 24 VAC/DC low voltage power operation
  • Form C dry contact relay output
  • Multi‑directional mounting bracket included
  • Temperature compensation sensitivity
  • Superior RFI and EMI immunity
  • Walk test and sensing status LED indicator
  • Easy programmable ON and OFF delays
  • Available for wall/corner/ceiling mount
Product Information
OS-551/OS-551T Datasheet
OS-551/OS-551T Installation Instruction

  • Cutting edge dual element infrared sensor
  • 24 VAC/DC low voltage power operation
  • Form C dry contact relay output
  • Multi‑directional mounting bracket included
  • Temperature compensation sensitivity
  • Superior RFI and EMI immunity
  • Walk test and sensing status LED indicator
  • Easy programmable ON and OFF delays
  • Available for wall/corner/ceiling mount

Product Information
OS-551/OS-551T Datasheet
OS-551/OS-551T Installation Instruction

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