Description
An alarm or burglar alarm system is a device that announces this illegal action when passing through a privacy by announcing a sound. Although alarms on the market are offered in different types and forms, but in general, they all have They have a common structure, ie most alarms have an open excitation line and a closed excitation line, which is the connection between the open sensor and the closed sensor, and have a normal key or alpha switch or cryptographic lock or remote control key to turn the device on and off. Are. They have a siren circuit and finally the alarms sometimes have an entry number, sometimes an exit number and sometimes an alarm number, and they are also equipped with an automatic caller when it is triggered.
