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Your alarm system sounds when one of your sensors is triggered or you manually set off the alarm through your control panel or key fob remote. Depending on how your system is set up, one of two things will happen-either a high-decibel alarm will sound or a silent alarm will be sent to your ADT monitoring station.hen your home security system's alarm sounds, it could mean one of many things. You could have an intruder in your home, or you could have a fire, a flood, or a carbon monoxide leak.
For this alarm system, the wires for the battery come directly out of the side of circuit board. First, verify that the power requirements of the circuit board match those of the battery. In this case, they should both be 12 volt 7 amp-hours.larm Siren/Horn Wiring. The siren/horn/bell for the system basically makes lots of noise when the alarm goes off. As before, if the siren didn't come as part of a kit, then verify that the siren doesn't draw too much current for the panel, in this case no more than 700 milliamps.