Belimo FSLF24-S On/Off Fire/Smoke Damper Actuator S/R 24V Auxiliary Switch

The Belimo FSLF24-S Fire/Smoke 24V Sr OnOff Auxsw is a safety device intended for use in HVAC systems. Dampers are airflow-regulating valves that are operated by a spring-loaded actuator. In normal operation, the Belimo FSLF24-S detects a 24-volt signal and opens the damper. However, if it detects smoke or fire, it will automatically close the damper and activate an auxiliary switch. This switch can then be used to raise an alarm, turn off the HVAC system, or activate additional safety features.The Belimo FSLF24-S is commonly used in structures that require fire protection, such as hospitals, schools, and high-rises. It instantly isolates impacted regions, which helps stop smoke and fire from spreading.