Alarm Horn: Description and Operation

GF80.50-P-6020MCC Alarm Signal Horn, Component Description
- with CODE (V01) Anti-theft alarm system (FFO)







H3/2 Alarm siren with inclination sensor

Location
The alarm siren is located on the right side of the vehicle at the bottom of the vehicle.

Task
^ Acoustic alarm output for anti-theft alarm (ATA)
^ Self-alarm output upon loss of supply voltage or communication to SAM control unit (N10/10)
^ Monitoring vehicle inclination for realizing tow-away protection function

The status of the alarm siren is polled via the local interconnect network interior compartment 2 by the SAM control unit.

Design
The alarm siren includes:
^ Rechargeable battery for ensuring power supply
^ Inclination sensor for analyzing vehicle inclination
^ Speaker for acoustic alarm output

Inclination sensor, function
When the tow-away protection function is activated, the ATA inclination sensor determines the reference position with which the relative vehicle inclination is compared during the activated time period. If the maximum vehicle inclination in relation to the reference position is exceeded, an alarm is triggered, at the earliest, 25 s after the ATA is activated.If the vehicle inclination changes very slowly (e.g. leaky tire), the reference position adapts to the current vehicle position to prevent inadvertent activation of the inclination sensor.