components and function of an alarm system?

In general, an alarm system consists of horn alarm, central control, and devices detection. Most detection devices work by opening a closed circuit. Thus, the cutting wire also opens the circuit and activate the alarm. Detection devices are the most common optical motion detectors that sense visual motion (usually to protect a room), motion detectors that open to detect physical movement (protection of a window), and auto switches that open when a Dorr opens.

ED-50 Watch Dog Alarm Function 2

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