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Echoflex Installation Guide
Ceiling-Mount Occ/Vac Sensor (MOS)
operate with a brief exposure to light, however for best results the sensor
should be exposed to two hours of natural or artificial light (160 lux or 15
footcandles) on a daily basis. A CR2032 coin battery must be installed in the
MOS-IR-xC sensor for use in high bay applications.
Sensing Technology
PIR sensing is calibrated to detect motion in the human body heat range.
The lens divides the viewing angle into zones to detect when infrared
energy moves in and out of a zone. Movement detection is stronger when
people are closer to the sensor.
Audio sensing filters out background noise level averaged over a 30
second window and sets its threshold slightly higher. If sound exceeds the
threshold while the timers are active, the sensor's occupied state is
maintained. For example, if a fan is running in the background of an
occupied space, only a sound slightly louder than the fan registers.
Key Timers
The Audio Enabled Timer defines the maximum duration that audio
sensing is active. Each PIR detection resets the Audio Enabled Timer. The
timer setting is 60 minutes, not configurable.
The Sensor Occupancy Timer defines the time that detection, PIR or audio
sensing, is required to keep the audio active. Each audio or PIR event resets
the timer. The default setting is 20 minutes and is configurable.
The sensor transmits an occupied or vacant message to the controller:
• Every 100 seconds, or
• Immediately when a change in the occupied state is detected
See the controller's Configuration Guide for details on setting up timers and
occupancy or vacancy modes of control.
Dual Technology (DT models)
When both PIR and audio sensing are enabled, the following logic is used:
• When the space is occupied, PIR and audio detection, can reset both
the Sensor's Occupancy Timer and the Controller's Occupancy Timer.
• When the space is vacant and all timers have expired, only PIR
detection or manual control can change the state to occupied.
• When audio is detected in the space, the Sensor's Occupancy Timer is
reset, but not the Audio Enabled Timer; it expires after 60 minutes or
is reset by PIR detection.
• Vacancy message is sent after 20 minutes (default) of no detection.
PIR Sensing Only (IR models)
For PIR sensing only, the following logic is used:
Ceiling-Mount Occ/Vac Sensor (MOS)
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