What function does a fire alarm control unit (FACU) serve?

The fire alarm control unit (FACU) primarily processes alarm signals received from fire detectors and initiates appropriate responses, making it a crucial component of a fire detection system. It acts as the central hub for managing all alarm inputs and outputs.

When fire detectors sense smoke, heat, or other indicators of a fire, they send signals to the FACU. The FACU interprets these signals, evaluates the information, and determines if an alarm condition exists. Once a potential fire situation is confirmed, the FACU can initiate various responses, such as sounding alarms, activating visual signals, notifying monitoring services, or triggering the release of suppression systems. This comprehensive processing capability ensures a coordinated response to fire threats, escalating safety measures effectively and efficiently.

While the other options mention important functionalities of a fire detection system, they do not encompass the primary role of the FACU, which is to process and respond to alarm signals.