Which fire alarm system component is designed to activate when smoke is detected?

The component designed to activate when smoke is detected is the alarm signal. This system is crucial for ensuring safety in buildings, as it represents the auditory or visual alert triggered by smoke detection. When a smoke detector senses smoke, it sends a signal to the alarm, which then initiates the audible alarms and alerts occupants of the potential fire hazard.

The control panel is responsible for managing the overall system and processing signals from various detectors, including smoke detectors. The power supply provides the necessary energy to all components of the fire alarm system, ensuring they function during an emergency. Notification appliances serve as the means of communication to alert occupants, but they are activated by the alarm signal and not directly by smoke detection. Thus, the alarm signal is the correct component specifically tied to the activation process upon detecting smoke.