Belimo TFB24-MFT Actuator

The Belimo TFB24-MFT Actuator is a field-programmable spring return actuator designed for the fail-safe control of dampers and valves in high-demand HVACR systems. Operating on 24VAC or 24VDC, this Multi-Function Technology (MFT) unit provides a 22 in-lb torque output and supports a wide range of control signals, including 4-20mA (via 500 Ohm resistor), PWM (via 1500 Ohm resistor), floating point, and on/off configurations. This versatility allows technicians to standardize on a single component for multiple application types, from air handling units to terminal equipment. The mechanical spring return mechanism ensures consistent fail-safe positioning during power loss, while the programmable stroke and runtime parameters enable precise adaptation to specific airflow requirements. Built for long-term field reliability, the TFB24-MFT features a brushless DC motor and a rugged NEMA 2 (IP54) enclosure to protect internal components in mechanical room environments.

• Multi-Function Technology (MFT): Enables field customization of control signals and feedback protocols for maximum application flexibility.
• Fail-Safe Performance: Integrated mechanical spring return ensures the damper or valve returns to a safe position during power interruptions.
• Universal Compatibility: Works seamlessly with 2-10 VDC, 4-20mA, and pulse width modulation signals commonly used in modern building automation systems.
• Brushless DC Motor: Provides efficient operation and consistent torque delivery without the maintenance requirements of traditional motors.
• Compact Design: Small footprint allows for installation in tight mechanical spaces where standard-sized actuators cannot fit.

How do I change the control signal on a TFB24-MFT?
The control parameters are adjustable using the Belimo MFT PC Tool or a handheld ZTH US tool, allowing for precise configuration of the input signal and feedback range.

Can this actuator be used with both 24VAC and 24VDC power?
Yes, the TFB24-MFT is designed to operate on a wide range of 24V power sources, making it compatible with most standard control transformers and DC power supplies.

What is the purpose of the 500 Ohm resistor mentioned in technical data?
The resistor is used to convert a 4-20mA control signal into a voltage signal that the actuator can process for proportional control.

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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.