Belimo SM24A-SR modulating damper actuator for HVAC air dampers up to approx. 4 m²; AC/DC 24 V, 2–10 V modulating control, 2–10 V position feedback, 20 Nm, IP54 / NEMA 2, 150 s/90°, lockable push-button manual override.
The Belimo SM24A-SR is a robust modulating rotary actuator designed to precisely position HVAC air dampers in AHUs and duct systems. It is controlled by a 2–10 VDC signal (Y) and drives the damper to the matching position. A 2–10 VDC feedback output (U) provides continuous damper position indication (0–100%) for BMS monitoring and verification.
It mounts directly on the damper shaft using a universal reversible shaft clamp (10…20 mm) with an anti-rotation mechanism. The actuator is overload protected, requires no limit switches, and stops automatically at the end stop. A lockable push-button manual override supports commissioning and maintenance
Applications
AHU fresh air / return air / exhaust air dampers (modulating control)
