Overview
The Belimo NMB24-3 is a non-spring return damper actuator designed for on/off and floating point control of dampers in HVAC systems. It mounts directly to damper shafts to provide reliable airflow modulation.
Features
- Powered by a sensorless Brushless DC motor controlled by an ASIC
- Digital Rotation Sensing (DRS) prevents damage during stall conditions
- Manual gear disengagement via push button on actuator cover
- Automatic shut-off when reaching end positions
- Supports add-on auxiliary switches or feedback potentiometers
Specifications
- Nominal Voltage: AC/DC 24 V
- Control Type: On/Off, Floating Point
- Angle of Rotation: 95°
- Shaft Diameter Compatibility: Up to 1.05 inches
- Power Consumption: Reduced in holding mode
Applications
- Control of air dampers in commercial HVAC systems
- Airflow modulation and ventilation control
- Direct mounting to damper shafts or linkage applications



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