Description
The Belimo LMB24-SR modulating damper actuator is a reliable, non-fail-safe solution designed for precise airflow control in commercial HVAC systems. Engineered for proportional modulation, this actuator delivers consistent performance using a 2–10V control signal with integrated 2–10V position feedback for accurate damper positioning.
Built with a brushless DC motor and advanced ASIC control, the LMB24-SR ensures smooth, efficient operation while protecting against overload conditions throughout its full rotation range. Its compact, direct-coupled design allows for easy installation on damper shafts without the need for additional linkage, making it a go-to choice for HVAC professionals.
With 45 in-lb torque, selectable direction of rotation, and manual override capability, this actuator offers flexibility and dependable control across a wide range of applications. Designed for durability, it operates in demanding environments while maintaining low power consumption and quiet performance.
Features:
- Precise Modulating Control – 2–10V input with 2–10V feedback for accurate damper positioning
- 45 in-lb Torque Output – Ideal for small to medium commercial HVAC dampers
- 24V AC/DC Operation – Compatible with standard low-voltage HVAC control systems
- Brushless DC Motor – Long-lasting, energy-efficient performance with reduced wear
- Direct-Coupled Mounting – Fits 1/4″ to 5/8″ shafts (up to 3/4″ with accessory clamp)
- Manual Override Function – Push-button control for easy adjustment during install/service
- Adjustable Rotation (Up to 95°) – Mechanical stop allows custom range settings
- Overload Protection – Electronic protection across full rotation range prevents damage
- Selectable Rotation Direction – Flexible installation with reversible motor direction
- Quiet Operation – Low sound level at approx. 35 dB(A)
Specifications:
- Voltage: 24V AC/DC
- Control Signal: 2–10V (4–20 mA with resistor)
- Feedback Signal: 2–10V
- Torque: 45 in-lb (5 Nm)
- Rotation: Max 95° (adjustable)
- Run Time: 95 seconds (90°)
- Power Consumption: 1.5W (operation), 0.4W (rest)
- Protection Rating: NEMA 2 / IP54
- Operating Temperature: -22°F to 122°F
- Humidity: Up to 95% RH (non-condensing)
- Weight: 1.3 lb
Applications:
- Air handling units (AHUs)
- VAV systems
- Zone control dampers
- Building automation systems
