Belimo NM24A-S Damper Actuator (10Nm, 24V, On/Off & 3-Point, Aux Switch)

Immediately available

Belimo NM24A-S Damper Actuator (10Nm, 24V, On/Off & 3-Point, Aux Switch)

Immediately available

Brand: Belimo

Product type: Damper Actuator

Operating Voltage: 24 VAC/DC

Force / Torque: 10 Nm

Control Signal: 2 Position3 Position

Belimo NM24A-S damper actuator for HVAC air dampers up to approx. 2 m²; AC/DC 24 V, open/close + 3-point, 10 Nm, IP54 / NEMA 2, 150 s/90°, with integrated adjustable auxiliary switch (1x SPDT, 0–100%) and lockable manual override.

Product information "Belimo NM24A-S Damper Actuator (10Nm, 24V, On/Off & 3-Point, Aux Switch)"

The Belimo NM24A-S is a compact rotary actuator designed for reliable control of HVAC air dampers in technical building installations. It supports open/close and 3-point (floating) control and includes an integrated auxiliary switch for end-position signalling, interlocks, and status feedback to BMS/control panels.

It is built for simple direct mounting using a universal shaft clamp with anti-rotation mechanism, features a lockable push-button manual override for commissioning/service, and has overload protection with automatic stop at end position—no external limit switches required.

Applications

AHU fresh air / return air / exhaust air dampers
Zone dampers in ducted HVAC systems
Fan interlocks and damper proof using the aux switch
BMS/DDC systems using 3-point floating control

Technical data

Specification	Value
Model	NM24A-S
Damper size	Up to approx. 2 m²
Supply	AC/DC 24 V, 50/60 Hz
Voltage range	AC 19.2–28.8 V / DC 19.2–28.8 V
Control	Open/Close, 3-Point
Torque	10 Nm
Running time	150 s / 90°
Rotation angle	Max 95° (adjustable mechanical end stops)
Manual override	Push-button, lockable
Auxiliary switch	1x SPDT, adjustable 0–100%
Aux switch rating	1 mA–3 A (0.5 A inductive), DC 5 V–AC 250 V
Power (operation / rest)	1.5 W / 0.2 W
Wire sizing	3.5 VA
Supply/control cable	1 m, 3 x 0.75 mm²
Aux switch cable	1 m, 3 x 0.75 mm²
Protection	IP54; NEMA 2; UL Enclosure Type 2
Safety	SELV (Protection Class III); UL Class 2 supply
Sound level	35 dB(A)
Shaft clamp	Universal 8…26.7 mm
Ambient	-30…50°C; max 95% RH non-condensing
Storage	-40…80°C
Weight	0.80 kg
Hygiene	VDI 6022 Part 1 / SWKI VA 104-01