Belimo LF24-S Damper Actuator SPDT Spring Return 24 VAC 35 in-lb

Belimo LF24-S is a spring-return damper actuator for HVAC dampers that delivers at least 35 in-lb (4 Nm) of torque from a 24 V input, supporting AC or DC control (24 VAC ±20%, 50/60 Hz; 24 VDC ±10%) and On/Off signaling to drive dampers reliably even after a power interruption. It includes a built-in SPDT signaling switch for damper position feedback or interlock signaling, with the auxiliary signaling feature commonly used in BAS interconnections. The actuator is housed in a zinc-coated steel enclosure rated IP54, corresponding to NEMA 2 protection, to withstand typical indoor environments encountered in heating and cooling equipment. Powering the LF24-S with standard 24 V systems and wiring, it is designed for direct integration with dampers in air-handling units, VAV terminals, and other control-damper applications where precise torque and a fail-safe return are required.