Belimo AFB24-MFT Actuator

The Belimo AFB24-MFT Actuator provides a robust 180 in-lb torque output, engineered for fail-safe operation in large air handling units and control dampers. This spring return actuator operates on a 24VAC/DC power supply and features Multi-Function Technology (MFT), allowing for precise field-customization of control signals, including 0-10 VDC, 4-20mA (via 500 Ohm resistor), and PWM (via 1500 Ohm resistor). It serves as the direct industry-standard replacement for legacy AF24-MFT and AFX24-MFT models, fitting the same footprint to minimize field modification time. Designed for high-static applications, it ensures positive shut-off and reliable modulating control. The NEMA 2 rated housing and brushless DC motor provide consistent speed regulation and over-load protection across its entire 95-degree rotation range, making it a critical component for HVAC automation and damper linkage systems requiring precise air flow modulation.

Key Benefits

• High Torque Output: Delivers 180 in-lb of torque, capable of driving large dampers or valves under high static pressure.
• Universal Compatibility: Programmable MFT allows one actuator to handle floating point, On/Off, and proportional control logic.
• Fail-Safe Reliability: Mechanical spring return ensures the damper returns to a safe position during power loss.
• Direct Replacement: Seamlessly replaces AF24-MFT and AFX24-MFT units without requiring new mounting brackets.
• Brushless DC Motor: Maintains constant torque and timing regardless of load, reducing wear on internal gear trains.

Common Questions

How do I configure the Belimo AFB24-MFT for a 4-20mA signal?
To utilize a 4-20mA control signal, a 500 Ohm resistor must be wired across the input to convert the signal to 2-10 VDC, which the MFT logic recognizes for positioning.

Can this actuator be used in smoke and fire applications?
No, the AFB24-MFT is designed for standard HVAC damper modulation and fail-safe control; it does not carry the UL555S rating required for dedicated smoke/fire safety systems.

What is the typical run time for this actuator?
The standard motor run time is 95 seconds for 90 degrees of rotation, with a spring return timing of less than 20 seconds at room temperature.

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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.