Which unit in a mercantile burglar alarm system is programmed to activate the sounding device upon alarm?

Which unit in a mercantile burglar alarm system is programmed to activate the sounding device upon alarm?

• A. Control Panel
• B. Programmable sounding control unit
• C. Repeater
• D. Sensor

Answer: (B)

The key idea is understanding which component directly drives the audible alert after an alarm is triggered. In a mercantile burglar alarm setup, sensors detect an intrusion and send that information to the control panel, which acts as the brains of the system. The actual activation of the sounding device—the siren or horn—is controlled by a dedicated output unit that is designed to be programmed: the programmable sounding control unit. This unit receives the alarm signal from the panel and energizes the siren according to the programmed parameters (such as how long it sounds and any sequencing with other outputs). The repeater’s job is to extend signals to remote panels or indicators, not to trigger the siren, and a sensor is only a detector, not an activator of the sounder.

The key idea is understanding which component directly drives the audible alert after an alarm is triggered. In a mercantile burglar alarm setup, sensors detect an intrusion and send that information to the control panel, which acts as the brains of the system. The actual activation of the sounding device—the siren or horn—is controlled by a dedicated output unit that is designed to be programmed: the programmable sounding control unit. This unit receives the alarm signal from the panel and energizes the siren according to the programmed parameters (such as how long it sounds and any sequencing with other outputs). The repeater’s job is to extend signals to remote panels or indicators, not to trigger the siren, and a sensor is only a detector, not an activator of the sounder.