OS‑551DT
Dual-Tech Occupancy Sensor

The OS‑551DT is a low voltage dual technology occupancy sensor designed to signal the occupancy status for area lighting, or HVAC control, for energy efficient building management.

 
Power: 22-26 VAC/DC
Sensing Tech: PIR+HFD
Output: Form C dry contact
Setting: Manual
Mount: Wall, ceiling, or corner
Connection: Lead wire
Coverage: Fixed
Compliance: FCC, CA24
  • ECG for 0-10V Continuous Dimming Control
  • Ambient light levels selectable to inhibit relay
  • HFD sensitivity adjustable for optimum range
  • 22-26 VAC/DC low voltage power operation
  • NC-COM-NO form C dry contact relay output
  • Multi‑directional mounting bracket included
  • Selectable ON-delay to filter walk-by traffics
  • 3 LED's indicate occupancy sensing activities
  • SmartDelay enables smart delay time setting
  • Walk-through mode available for more saving
  • Audible Delay-End Warning enabled/disabled
  • Manual override control signal input available
  • 5-minute TEST mode with shortest OFF-delay
  • Available for wall/corner/ceiling mount
  • Pigtail wires for easy connection
Product Information
OS-551DT Datasheet
OS-551DT Installation Instruction

Power: 22-26 VAC/DC
Sensing Tech: PIR+HFD
Output: Form C dry contact
Setting: Manual
Mount: Wall, ceiling, or corner
Connection: Lead wire
Coverage: Fixed
Compliance: FCC, CA24
  • ECG for 0-10V Continuous Dimming Control
  • Ambient light levels selectable to inhibit relay
  • HFD sensitivity adjustable for optimum range
  • 22-26 VAC/DC low voltage power operation
  • NC-COM-NO form C dry contact relay output
  • Multi‑directional mounting bracket included
  • Selectable ON-delay to filter walk-by traffics
  • 3 LED's indicate occupancy sensing activities
  • SmartDelay enables smart delay time setting
  • Walk-through mode available for more saving
  • Audible Delay-End Warning enabled/disabled
  • Manual override control signal input available
  • 5-minute TEST mode with shortest OFF-delay
  • Available for wall/corner/ceiling mount
  • Pigtail wires for easy connection

Product Information
OS-551DT Datasheet
OS-551DT Installation Instruction


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