Description
The Belimo NMB24-SR is a non-spring-return rotary damper actuator engineered for precise modulating control in commercial and industrial HVAC applications. Powered by 24 VAC or 24 VDC, it accepts a 2–10 VDC proportional control signal to deliver smooth, accurate positioning across the full 95° rotation range.
Key Features
- 90 in-lb (10 Nm) torque output — suitable for medium to large damper assemblies
- Proportional 2–10 VDC (SR) control signal for precise modulating operation
- Dual-voltage power supply: 24 VAC or 24 VDC
- Non-spring-return (NMB) design for energy-efficient positioning
- 95° nominal rotation with manual override for easy commissioning
- Compact, rugged housing rated for direct-coupled mounting — no crank arm or linkage required
- Brushless DC motor technology for long service life and low maintenance
- Integrated gear train with self-locking mechanism holds position on power loss
Electrical Specifications
- Supply Voltage: 24 VAC / 24 VDC (±20%)
- Control Signal: 2–10 VDC proportional
- Power Consumption: Approximately 2.5 W (running) / 0.5 W (holding)
- Overload Protection: Electronic throughout rotation
Mechanical Specifications
- Torque: 90 in-lb (10 Nm)
- Rotation: 95° nominal
- Drive Type: Direct-coupled rotary
- Mounting: Universal clamp, fits shafts up to 3/4 in. (19 mm) round or square
- Direction of Rotation: Selectable CW / CCW via switch
Certifications & Compliance
- UL Listed
- CE Marked
- cULus recognized
Typical Applications
- VAV and constant-volume air handling units
- Mixing, bypass, and isolation dampers
- Building automation and DDC systems requiring proportional control
- Commercial HVAC zoning and economizer applications
Belimo is the global leader in actuator technology, and the NMB24-SR reflects that expertise with a reliable, field-proven design trusted by mechanical contractors and building automation engineers worldwide. Order the Belimo NMB24-SR from Jackson Systems for fast fulfillment and expert support.
Reviews
There are no reviews yet.