This group of car security includes alarms and immobilizers controlled by electronic systems. The main task of the anti-theft alarm system is to deter a thief during an attempted theft. The device, after activation by the user, reacts with the sound of the alarm siren and flashing of the car lights, when any doors or covers of the car are opened. Breaking the glass will cause a similar reaction, attempt to start the engine, lifting or pulling the vehicle onto a tow truck.
An immobilizer is a device, which, when activated by the user, is designed to prevent the engine from starting and the car from driving away on its own. This task is accomplished by interrupting the power supply to several electrical circuits of the car, np. ignition system, fuel pump, fuel injection system, etc.. These systems are restored to working order after authorization of the immobilizer by the user. Authorization can be done remotely via the remote control, after checking the transponder code (in the key, magnetic card, "Lozenge") or turning off a hidden switch.
Modern alarms combine the functions of both security devices and offer many additional, np. central locking control, electric opening of windows or delayed extinguishing of lights.
The car alarm is a basic additional security feature, which is required by insurance companies when concluding an Auto Casco contract. Insurance companies conclude AC contracts, if the car is fitted with an anti-theft alarm system with a valid performance certificate issued by
an authorized research facility. The authorization to test alarms and issue approval certificates is granted to the Automotive Industry Institute in Warsaw and the Świętokrzyska University of Technology.
As a result of testing, alarms are divided into classes.
POPULAR CLASS (POP)
It includes the simplest car alarms without a built-in immobilizer that perform only basic functions: alarm siren response to opening doors and covers, remote control without changing code, no outputs for operating additional devices.
STANDARD CLASS (STD)
Like the popular class with one immobilizer circuit built in.
PROFESSIONAL CLASS (PRF)
These are car alarms with extensive functions with a built-in immobilizer with two or more circuits, the pilot must work with a dynamically changing code. This class of devices requires increased resistance of the control panel housing to external conditions. The applied electronic systems must ensure correct operation of the alarm at low temperatures and be resistant to significant overvoltage in the electrical system.
EXTRA CLASS (EXTRA)
Devices of this class usually have highly developed additional functions, can cooperate with cellular telephone systems, radio messaging systems when an attempted theft is detected. This class also requires high-quality assembly of electronic parts, non-corrosive connectors, durable housing, increased resistance to radio interference, electrostatic, overvoltages, chemical factors and temperature.