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This guide covers all models of MOS-21 sensor.
The MOS-21 product family includes:

MOS-21UA  Motion Sensor with 902 MHz radio with short range lens

MOS-21UB  Motion Sensor with 902 MHz radio with large range lens

MOS-21UC  Motion Sensor with 902 MHz radio with high bay lens

MOS-21CA  Motion Sensor with 315 MHz radio with short range lens

MOS-21CB  Motion Sensor with 315 MHz radio with large range lens

MOS-21CC  Motion Sensor with 315 MHz radio with high bay lens

MOS-21YA  Motion Sensor with 868 MHz radio with short range lens

MOS-21YB  Motion Sensor with 868 MHz radio with large range lens

MOS-21YC  Motion Sensor with 868 MHz radio with high bay lens

The package includes the occupancy sensor and installation guide.

MOS-21 Sensor Description

The 21 series MOS sensor (also referred to as the sensor in this guide) is a 

wireless,  energy  harvesting,  ceiling  mount,  passive  infared  (PIR)  occupancy 

sensor. Used for indoor applications, the detector is optimized for ceiling heights 

of 8 - 10 feet (2.4 - 3m).

MOS-21

echo

flex

Wireless Motion Sensor for Occupancy / Vacancy Detection

with integrated diagnostic tools

INSTALLATION GUIDE

NOTE: 

The MOS is a solar powered device that absorbs solar energy storing it 

for use during low light periods. Before assigning the MOS device to a receiver/

controller, the device should be exposed to a good light source for a minimum of 

5 minutes or install the start assist battery.

Summary of Contents for MOS-21 Series

Page 1: ...Motion Sensor with 868 MHz radio with high bay lens The package includes the occupancy sensor and installation guide MOS 21 Sensor Description The 21 series MOS sensor also referred to as the sensor...

Page 2: ...nds When the sensor awakens and no motion is detected the sensor transmits a vacancy telegram after 100 seconds 200 seconds total since the previous transmission The sensor will remain active until th...

Page 3: ...tly affect the receivers reception of the telegrams Before installing refer to the sections in the guide detailing the installation of wireless devices layout tips and test operation modes NOTE The se...

Page 4: ...the lens pops free 4 Choose a mounting method The sensor can be mounted With the screws and anchors not provided to a wall board ceiling Use a pencil to mark the mounting base key hole locations and r...

Page 5: ...accordance to the light level it is detecting see table below Light Level Test Indication Blinks Lux Foot candles Time to Fully Charge Discharge Time 0 0 0 below operating level n a 1 20 40 2 4 operat...

Page 6: ...nds 2 A quick press and release of the button at this point will allow you to select between test modes Pressing and releasing the test button scrolls through the LED indicators When the red LED is bl...

Page 7: ...me wall Avoid locating transmitters and receivers where the telegrams must penetrate walls at acute angles This increases the material the telegram must pass through reducing the signal power Avoid la...

Page 8: ...t notice Document 8DC 5492 Revision 1 4 8188M21 5492 1 Rev C Regulatory Statements FCC Part 15 231 315 and 902 MHz models only Contains FCC ID TCM300C or TCM300U The enclosed device complies with Part...

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