The principle of door magnetic alarm

The magnet can be activated in conjunction with the access control controller. If the door is illegally broken in (the door is opened without swiping the card or illegal operation of the button, such as kicking or prying open), the alarm will be sent. It can cooperate with the access control controller to enable the alarm when the door has not been closed for a long time.

If you don’t need an access control system with this function, you don’t need to connect the magnet. If you need these functions, just connect the magnet to the door sensor input point of the controller without distinguishing between positive and negative. If in a large multi-door access control system, only a few doors use these functions of the door sensor, other door sensor input points should be short-circuited with wires to avoid generating false alarm signals.

Extended information

Main functions

1. Pneumatic installation-free

Through advanced air pressure detection technology, installation-free is truly realized . This ensures that the original circuit of the vehicle is not damaged.

2. Dual-detection sensing technology

Built-in air pressure difference and vibration sensors, dual-detection alarms can be set through SMS or remote control. That is to say, vibration and pressure must be triggered within a certain period of time before alarming via text messages and phone calls. To reduce false alarms caused by thunder, firecrackers, passing vehicles or other ground vibrations.

3. Anti-theft and anti-robbery

After the vehicle enters the "fortified" state, if there is an alarm, the new GSM anti-theft device will immediately dial the owner's preset alarm number (mobile phone, landline etc.) alarm, or SMS alarm. Sound and light warning.

When a robbery or car snatching occurs, the driver can press the hidden button or the help button on the remote control to send an alarm. After receiving the alarm call, the robbed vehicle can be immediately shut down, monitored, etc., and the car circuit can be locked at the same time. , oil circuit, so that the vehicle cannot be started before the alarm is cleared.

Baidu Encyclopedia-Door Magnetic Alarm