Belimo LM230A-SR Modulating Damper Actuator (5Nm, 230V-Class, 2–10V, Feedback)

Immediately available

Belimo LM230A-SR Modulating Damper Actuator (5Nm, 230V-Class, 2–10V, Feedback)

Immediately available

Brand: Belimo

Product type: Damper Actuator

Operating Voltage: 100 - 240 VAC

Force / Torque: 5 Nm

Control Signal: 2–10 VDC (modulating)

Belimo LM230A-SR (LM230ASR) modulating damper actuator for air dampers up to approx. 1 m²; AC 100–240 V (wide-range, suitable for 230 V), modulating control 2–10 V, position feedback 2–10 V, 5 Nm, IP54, 150 s/90°, manual override.

Product information "Belimo LM230A-SR Modulating Damper Actuator (5Nm, 230V-Class, 2–10V, Feedback)"

The Belimo LM230A-SR is a compact modulating rotary actuator for precise positioning of HVAC air dampers in AHUs and duct systems. It accepts a 2–10 VDC control signal and drives the damper proportionally to the requested position. A 2–10 VDC position feedback output is provided for monitoring and for master/slave control strategies.

The actuator is designed for direct mounting using a universal shaft clamp (6–20 mm) and includes manual override with a lockable push-button, adjustable mechanical end stops, and overload protection for reliable operation.

Applications

AHU fresh air / return air / exhaust air damper modulation
Economizer and mixing-box dampers (proportional positioning)
VAV / pressure control sequences requiring stable modulating damper control
BMS systems using 2–10 V control with position feedback for monitoring/alarming
Retrofit projects requiring wide-range AC supply (100–240 V)

Technical Specifications

Specification	Value
Model	LM230A-SR (LM230ASR)
Damper size	Up to approx. 1 m²
Supply voltage	AC 100–240 V, 50/60 Hz
Voltage range	AC 85–265 V
Control signal (Y)	2–10 VDC (modulating)
Input impedance	100 kΩ
Feedback (U)	2–10 VDC (max 1 mA)
Aux supply (for positioner)	DC 24 V ±30%, max 10 mA
Torque	5 Nm
Position accuracy	±5%
Direction of rotation	Selectable by switch
Running time	150 s / 90°
Rotation angle	Max 95° (adjustable end stops)
Manual override	Push-button, lockable
Power consumption	2 W (operation), 1 W (rest)
Wire sizing	4 VA
Protection	IP54, NEMA 2 / UL Type 2
Protection class	Class II (reinforced insulation)
Sound level	35 dB(A)
Connection (supply)	Cable 1 m, 2 x 0.75 mm²
Connection (control)	Cable 1 m, 4 x 0.75 mm²
Shaft clamp	Universal 6–20 mm
Ambient	-30…50°C; max 95% RH non-condensing
Storage	-40…80°C
Weight	0.57 kg