Relays function as key electromagnetic relays that manage electrical current to critical system elements in response to signals from the fire alarm controller. As soon as a manual pull station detects a combustion event, it transmits a signal to the control panel, انواع رله which then closes a relay circuit to initiate evacuation alerts, notify emergency services, or activate suppression systems such as sprinklers.
Their presence is crucial because they facilitate weak signal management to safely operate high-voltage devices like strobe lights. This electrical isolation prevents circuit damage from power surges, ensuring reliable functionality even under extreme conditions. They provide system isolation, meaning that one component malfunction does not compromise overall safety.
Within multi-story facilities, relays support area-specific control, permitting alarms and responses to be localized to affected zones. This enhances response precision and minimizes public panic by limiting notifications to danger zones. They can be configured to keep essential circuits energized during utility interruption, ensuring the safety protocols continue operating even when primary electricity fails.
Modern fire alarm installations frequently employ semiconductor switches for instantaneous response and reduced maintenance needs. Many installations continue to use remain prevalent due to their mechanical simplicity in high-vibration settings. Regardless of design, relays are engineered to comply with UL 864 regulations and undergo accelerated lifecycle evaluations to guarantee correct operation under dusty or corrosive atmospheres.
If relays were omitted, fire alarm systems would be limited to detection-only functionality, rendering them potentially life-threatening. Their quiet, unseen operation is critically essential saving lives and limiting fire-related destruction during emergencies.
