Belimo NMX120-SR Actuator

The Belimo NMX120-SR is a premium non-spring return rotary actuator designed for the precise modulation of dampers in HVAC systems. Delivering 90 in-lb of torque, this proportional damper actuator operates on a 120V AC power supply and utilizes a 2 to 10 VDC control signal for accurate positioning. It is engineered for universal mounting, featuring a reversible direction of rotation and an adjustable angle of rotation to accommodate various air handling unit (AHU) configurations. The brushless DC motor technology ensures maintenance-free operation and constant torque across its entire stroke. This NEMA 2 rated actuator is ideal for contractors looking for a reliable 120 volt modulating actuator that integrates seamlessly with existing building automation systems. Its compact design and high-strength housing make it a staple for high-duty cycle applications where linear or rotary damper control is critical for airflow regulation.

Key Benefits

• 90 in-lb Torque Output: Provides ample power for medium-sized dampers and valves without risk of stalling.
• Proportional 2-10 VDC Control: Delivers precise modulation for optimized HVAC energy efficiency.
• Universal Power Compatibility: Runs on standard 120V AC, eliminating the need for step-down transformers in many retrofit applications.
• Electronic Overload Protection: Protects the motor from damage at end-of-stroke without the need for limit switches.
• Manual Override: Features an external push-button to allow for manual positioning during commissioning or system testing.

Common Questions

How do I change the direction of rotation on the NMX120-SR?
The direction of rotation can be easily toggled using the external switch located on the actuator housing, allowing for clockwise or counter-clockwise operation based on the control signal.

What is the typical runtime for this actuator?
The Belimo NMX120-SR typically features a motor run time of 95 seconds, providing smooth and controlled transition for 90-degree applications.

Can this actuator be used in outdoor applications?
While the unit is NEMA 2/IP54 rated for protection against falling dirt and light splashing water, an additional weather shield is recommended for direct outdoor exposure.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.