Description
The Belimo NM24-SR is a proportional 24 VAC/DC damper actuator designed for precise modulation of air dampers in commercial HVAC and building automation systems. Delivering a minimum torque of 8 Nm with a configurable rotation angle up to 95°, it provides accurate damper positioning and reliable performance for ventilation and climate control applications.
Technical Specifications
| Condition |
New/Never Used Surplus |
| Brand |
Belimo |
| Category |
HVAC Controls |
| Part Number |
NM24-SR |
| Subcategory |
Damper Actuators |
| Product Type |
Proportional Damper Actuator |
| Power Supply |
24 VAC / 24 VDC |
| Power Consumption |
1.3 W (during operation) |
| Control Signal |
Proportional Analog |
| Position Feedback |
2–10 VDC |
| Torque |
Minimum 8 Nm |
| Rotation Angle |
Maximum 95°, adjustable with mechanical stops |
| Operating Temperature |
-20°C to +50°C |
| Protection Rating |
IP54 |
| Noise Level |
Maximum 35 dB(A) |
| Manual Override |
Push-button manual control |
| Calibration |
Automatic startup calibration |
| Parallel Operation |
Supported |
| Maintenance |
Maintenance-Free |
| Weight |
0.8 kg (1.76 lb) |
Information About NM24-SR
The NM24-SR is a member of the Belimo NM Series of modulating damper actuators developed for controlling air dampers in HVAC installations. It operates on 24 VAC/DC power and accepts proportional control signals while providing a 2–10 VDC position feedback output for continuous monitoring. The actuator automatically calibrates its running time and rotation angle during startup, ensuring accurate positioning without manual adjustment. Designed with an IP54-rated enclosure, quiet operation, and maintenance-free construction, it is suitable for long-term service in commercial building automation systems.
Key Features:
- Proportional Modulating Control: Supports precise analog damper positioning for HVAC applications.
- 8 Nm Torque Output: Delivers reliable operation for medium-sized air dampers.
- Automatic Calibration: Automatically adjusts running time and rotation angle during startup.
- Position Feedback: Provides a 2–10 VDC feedback signal for monitoring actuator position.
- Adjustable Rotation: Offers up to 95° rotation with mechanical end stops.
- Manual Override: Includes a manual control button for commissioning and functional testing.
- Quiet Operation: Operates with a maximum sound level of 35 dB(A).
- Parallel Wiring Capability: Allows multiple actuators to operate from the same control signal.
The NM24-SR delivers the reliability and precision required for accurate proportional damper control in commercial HVAC and building automation systems.
