Belimo NMQB24-MFT Actuator

The Belimo NMQB24-MFT Actuator is a non-spring return, high-speed solution designed for precise proportional damper control in commercial HVAC systems. Delivering a steady 70 in-lb torque, this multifunction technology (MFT) actuator offers field-programmable flexibility via 24Vac/dc power. It natively supports a 2-10Vdc control signal, but remains adaptable for 4-20mA modulation (using a 500 Ohm resistor), PWM (1500 Ohm), and floating point or on/off configurations. Built with a brushless DC motor, the unit ensures constant run times regardless of load and incorporates electronic overload protection throughout its 95-degree rotation, eliminating the need for mechanical limit switches. Contractors will value the universal shaft clamp that self-centers on various jackshaft diameters, while the manual override button and integrated reversing switch streamline commissioning and troubleshooting. This robust rotary motor is engineered for 100,000 cycles, providing a reliable interface for modern building automation systems requiring rapid, accurate response.

• Programmable Flexibility: Features MFT technology for field customization of control signals, including 2-10Vdc, 4-20mA, or pulse width modulation.
• Efficient Installation: The direct-coupled design with a universal clamp eliminates the need for complex linkages on shafts up to 1.05 inches.
• Brushless Motor Accuracy: Uses a brushless DC motor for maintenance-free operation and highly accurate positioning.
• Stall Protection: Digital rotation sensing (DRS) technology prevents motor damage during a stall condition without requiring end switches.
• Rapid Response: Optimized for high-speed applications where damper timing is critical for airflow management.

How do I change the direction of rotation?
The unit features a built-in reversing switch on the housing. Simply toggle the switch between '0' and '1' to change the clockwise/counter-clockwise logic without re-wiring.

Can I use a 4-20mA controller with this actuator?
Yes. While the default signal is 2-10Vdc, you can modulate via 4-20mA by adding an external 500 Ohm resistor or utilizing the programmable MFT parameters.

What happens if the damper jams?
The Belimo NMQB24-MFT is electronically protected against overload. It will stop automatically at the end of its stroke or upon hitting an obstruction, preventing actuator burn-out.

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.