Belimo AFBUP-S Actuator

The Belimo AFBUP-S Actuator is a heavy-duty spring return damper actuator engineered for precise on/off control in demanding HVACR environments. Providing a robust 180 in-lb torque (20 Nm), this unit is designed to drive large control dampers or mechanical linkages in air handling units and ventilation systems. Its universal power supply allows for seamless integration across a wide voltage range, accepting AC 24 to 240 V or DC 24 to 125 V, which simplifies inventory for contractors managing diverse site requirements. The integrated dual SPDT auxiliary switches provide essential position feedback for safety interlocks or sequencing. In the event of a power loss, the mechanical spring ensures a reliable fail-safe position in under 20 seconds, protecting critical coils and equipment. Built with a NEMA 2 and IP54 rated enclosure, the AFBUP-S maintains consistent timing and performance in ambient temperatures ranging from -22°F to 122°F.

• Universal Compatibility: The wide voltage input eliminates the need for external transformers, making it a versatile damper motor replacement for various control signals.
• High Torque Output: Delivering 180 in-lb of force, it handles larger damper sections without the need for tandem mounting in many standard applications.
• Integrated Feedback: Two internal auxiliary switches come standard (adjustable 0 to 95°), allowing for easy integration with fans or chillers without adding field-mounted accessories.
• Manual Override Capability: Includes a 5 mm hex crank to allow technicians to manually position dampers during commissioning or emergency service.
• Rugged Reliability: Utilizing brushless DC motor technology and a mechanical fail-safe, it ensures repeatable cycles in high-usage air handling systems.

What is the typical running time for the Belimo AFBUP-S?
The motor operates at a consistent 75 seconds per 90° rotation, while the spring return fail-safe reacts in less than 20 seconds at nominal temperature.

Can the direction of the spring return be changed?
Yes. The AFBUP-S is reversible. The direction of the fail-safe rotation (clockwise or counter-clockwise) is determined by which side of the actuator is mounted facing the damper shaft.

Is this actuator compatible with specific shaft sizes?
It is designed for universal mounting on 1/2" to 1.05" round shafts or 3/8" to 3/4" square shafts using the standard U-clamp provided.

This item is not eligible for free shipping.

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.