Overview
The Belimo EFB24-S is a 24V spring return damper actuator delivering 270 in-lb of torque with built-in auxiliary switches for fail-safe on/off air control in HVAC systems.
Features
- Mechanical spring return fail-safe action ensures damper closure/opening under power loss
- Two SPDT auxiliary switches provide adjustable position status feedback
- Direct shaft coupling with universal clamp simplifies installation
- High torque capacity for controlling large damper assemblies
Specifications
- Torque: 270 in-lb [30 Nm]
- Nominal Voltage: AC/DC 24 V
- Control Type: On/Off
- Actuator Type: Spring Return with Auxiliary Switch
- Auxiliary Switches: 2 x SPDT
- Degree of Protection: IP54, NEMA 2
Applications
- On/off fail-safe airflow management in commercial HVAC ductwork
- Damper position signaling and fan interlocking controls



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