Belimo EFB24-MFT-S Spring Return Actuator 270 in-lb MFT 24V w/ Aux Switch

Description

Belimo EFB24-MFT-S Spring Return Damper Actuator

The Belimo EFB24-MFT-S is a heavy-duty spring return damper actuator engineered for reliable, fail-safe operation in commercial and industrial HVAC applications. Delivering 270 in-lb of torque, this actuator is well-suited for medium to large damper assemblies where consistent, precise control is essential. The spring return mechanism ensures the damper returns to its fail-safe position upon loss of power, providing a critical layer of protection for building systems.

Multi-Function Technology (MFT) Signal Compatibility

The EFB24-MFT-S features Belimo’s Multi-Function Technology (MFT), offering exceptional signal flexibility to integrate seamlessly with virtually any building automation or control system. Accepted input signals include:

• 4–20 mA (500 Ohm input impedance)
• PWM — Pulse Width Modulation (1500 Ohm input impedance)
• Floating point (tri-state) control
• On/Off control

Power & Electrical Specifications

• Supply voltage: 24 Vac / 24 Vdc
• Torque output: 270 in-lb
• Spring return fail-safe operation
• Integrated auxiliary switch for end-position feedback or interlock wiring

Key Features & Benefits

• Spring return design provides automatic fail-safe positioning on power loss
• MFT signal flexibility supports 4–20 mA, PWM, floating point, and On/Off — one actuator for multiple control strategies
• 500 Ohm input impedance for 4–20 mA signals; 1500 Ohm for PWM signals
• Built-in auxiliary switch for end-position indication or system interlocks
• Dual voltage compatibility — operates on both 24 Vac and 24 Vdc power supplies
• Robust construction designed for long service life in demanding commercial environments
• Direct-coupled mounting — no crank arm or linkage required for most damper shafts

Typical Applications

• Commercial HVAC air handling units (AHUs)
• Outside air, return air, and exhaust damper control
• Economizer and mixed-air damper systems
• Building automation and energy management systems
• VAV and constant volume air distribution systems

The Belimo EFB24-MFT-S is a versatile, contractor-friendly actuator that simplifies installation and commissioning while delivering the dependable performance Belimo is known for worldwide.