Alarm system and horn (Volumetric sensors): Description and operation

Volumetric sensors

The BCU uses volumetric sensors to detect any change in air movement within the vehicle. There are two sensors located in the headlining of the vehicle.

Input/Output The sensors require a regulated power supply of 12 volts, via the BCU. When a change in air movement is detected the sensors generate a 5 Hz pulse train to the BCU.

Each of the sensors have a dedicated signal input to the BCU. Power to the sensors is supplied by the BCU.

TestBook provides the ability to monitor the real time state of the sensors.