Belimo NM24A-SR modulating damper actuator for HVAC air dampers up to approx. 2 m²; AC/DC 24 V, 2–10 V modulating control, 2–10 V position feedback, 10 Nm, IP54 / NEMA 2, 150 s/90°, lockable manual override.
The Belimo NM24A-SR is a compact modulating rotary actuator designed for accurate positioning of HVAC air dampers in AHUs and duct systems. It is controlled by a 2–10 VDC signal (Y) and drives the damper to the corresponding position. A 2–10 VDC feedback output (U) provides continuous damper position indication (0–100%) for BMS monitoring and control verification.
It mounts directly on the damper shaft using a universal shaft clamp and includes an anti-rotation mechanism. The actuator is overload protected, requires no limit switches, and automatically stops when end stops are reached. A lockable push-button manual override supports commissioning and maintenance.
Applications
AHU fresh air / return air / exhaust air dampers (modulating control)
