OSC04-RIW occupancy sensor is an infrared heat detection sensor.
The maximum detection range is 42m2. The sensor itself has a switch to delay the sensor's operation and a switch to adjust the detection range.

Infrared heat detection sensor
Maximum detection range is 42m2
Switches to adjust the delay time and detection range of the sensor to select its operation
Simple ceiling-mounted type for easy installation

This sensor is connected to the DI input of the relay module or lighting control panel, and operates the corresponding relays.
To prevent frequent operation of the sensor, there is a switch to set the delay time in the sensor, which can delay operation for up to 30 minutes. That is, when a person is detected, the operation is performed immediately, and when the person moves out of the detection range, the sensor waits until the set time elapses before turning off the relays.

Passive Infrared.
Mount : Ceiling
Detection Range : 41.8m2
Pattern Degrees : 360 degrees
Adjustment : Self-Adjustment
Isolated Relay : Yes
Manual Time Adjustment : 30 seconds - 30 minutes, 6-second test mode
Input Voltage : 24VDC
Power Consumption : 15mA
Operating Conditions : 0 - 40ºC, 0 - 90%
Certification : CUL/US(Listed 9034), ANCE, ASHRAE, FCC