Belimo LM24A-S Damper Actuator (5Nm, 24V, On/Off & 3-Point, Aux Switch)

Immediately available

Belimo LM24A-S Damper Actuator (5Nm, 24V, On/Off & 3-Point, Aux Switch)

Immediately available

Brand: Belimo

Product type: Damper Actuator

Operating Voltage: 24 VAC/DC

Force / Torque: 5 Nm

Control Signal: 2 Position3 Position

Belimo LM24A-S damper actuator for HVAC air dampers up to approx. 1 m²; AC/DC 24 V, open/close or 3-point control, 5 Nm, IP54 / NEMA 2, 150 s/90°, with integrated adjustable SPDT auxiliary switch and lockable manual override

Product information "Belimo LM24A-S Damper Actuator (5Nm, 24V, On/Off & 3-Point, Aux Switch)"

The Belimo LM24A-S is a compact rotary actuator designed to adjust HVAC air dampers in AHUs and duct systems. It supports open/close and 3-point (floating) control, making it suitable for standard control panel wiring. The actuator includes a lockable manual override push-button for commissioning and service, plus adjustable mechanical end stops to limit rotation.
The integrated auxiliary switch (SPDT) provides end-position feedback for interlocks (fan enable, damper proof, alarms) and BMS monitoring.

Applications

AHU fresh air / return air / exhaust air dampers
Zone dampers in ducted HVAC systems
Fan interlocks and damper end-switch confirmation (BMS / control panels)
3-point floating control sequences (simple proportional positioning by timing)
Status feedback using the integrated auxiliary switch

Technical data

Specification	Value
Model	LM24A-S
Damper size	Up to approx. 1 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	5 Nm
Running time	150 s / 90°
Rotation angle	Max 95° (adjustable mechanical end stops)
Manual override	Push-button, lockable
Power consumption	1 W (operation); 0.2 W (rest)
Wire sizing	1.5 VA
Auxiliary switch	1x SPDT, adjustable 0–100%
Aux switch rating	1 mA–3 A (0.5 A inductive), DC 5 V–AC 250 V
Supply/control connection	Cable 1 m, 3x 0.75 mm²
Aux switch connection	Cable 1 m, 3x 0.75 mm²
Protection	IP54; NEMA 2; UL Enclosure Type 2
Safety	SELV (Protection Class III); UL Class 2 supply
Ambient	-30…50°C; max 95% RH non-condensing
Storage	-40…80°C
Weight	0.54 kg