IR-TEC America, Inc.

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.

Features
Downloads

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

Features

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

Download

Product Information

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

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