SF24A-S2 - Belimo Spring-return Damper Actuator 20 Nm, < 75 s, 95°

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The Belimo SF24A-S2 is a kind of Actuator used in HVAC applications and air ventilation systems.

The Torque used by the SF24A-S2 is 20 Nm.

The power supply requested for this Rotary Actuator is 24Vac/Vdc.

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If you are unsure about size or installation, refer to the Belimo custom datasheet above or message iacs to receive special instructions and a custom quote.

The Belimo SF24A-S2 is a Spring-return actuator.

•    Spring-return actuator
•    20 Nm, < 75 s, 95°
•    AC / DC 24 V, Open/Close, 2 x SPDT
•    IP 54, Manual override with integrated position stop
•    Running time spring < 20 s
•    Control Open/Close with single-wire contact
•    Connection PVC cable 1m
•    Auxiliary switch 2 integral
•    Rating 1 mA...3(0.5)A, AC 250 V
•    Spindle driver universal spindle clamp
•    Direction of rotation reversible (right/left)
•    Angle of rotation limit. mech. adjustable

Features

Mode of operation At the same time as tensioning the return spring, the actuator pushes the damper to the operating position. If the supply voltage is disconnected, the damper is returned to the emergency position by spring force.

Simple direct mounting Simple direct attachment on the damper spindle using a universal spindle clamp, which includes an anti-rotation strap to keep the actuator from turning.

Manual override The hand crank is used to manually operate the damper, and the interlocking switch locks it in any position. Applying the operational voltage unlocks the door manually or automatically.

Adjustable angle of rotation With a mechanical end stop, the angle of rotation can be adjusted. 

High operational reliability The actuator is overload-proof, doesn't require limit switches, and stops when the end stop is reached automatically.

Flexible signalization One auxiliary switch has a fixed position and one auxiliary switch can be adjusted on the actuator. They let you signal a ten per cent or ten... ninety per cent angle of rotation.

•     Electrical data Nominal voltage AC 24 V, 50/60 Hz / DC 24 V
•     Nominal voltage range AC 19.2 ... 28.8 V / DC 21.6 ... 28.8 V
•     Power consumption In operation 5 W @ nominal torque At rest 2.5 W For wire sizing 7.5 VA
•     Auxiliary switch 2 x SPDT, 1 mA ... 3 (0.5) A, AC 250 V (1 x fix 10% / 1 x adjustable 10 ... 90%)
•     Connection Motor Cable 1 m, 2 x 0.75 mm2 Auxiliary switch Cable 1 m, 6 x 0.75 mm2
•     Functional data Torque Motor Min. 20 Nm @ nominal voltage Spring return Min. 20 Nm 
•     Direction of rotation Can be selected by mounting L / R
•     Manual override With hand crank and interlocking switch
•     Angle of rotation Max. 95°<) , can be limited with adjustable mechanical end stop
•     Running time Motor ≤75 s (0 ... 20 Nm) Spring return ≤20 s @ –20 ... 50°C / max. 60 s @ –30°C
•     Sound power level Motor ≤45 dB (A) Spring return ≤62 dB (A)
•     Service life Min. 60,000 emergency positions
•     Position indication Mechanica
•     Safety Protection class III Totally insulated 
•     Protection mode IP54 NEMA2, UL Enclosure Type 2
•     EMC CE according to 2004/108/EC Low-voltage directive CE according to 2006/95/EC
•     Certification cULus according to UL 60730-1A and UL 60730-2-14 and CAN/CSA E60730-1:02 Certified to IEC/EN 60730-1 and IEC/EN 60730-2-14
•     Mode of operation Type 1.AA.B
•     Rated impulse voltage Actuator 0.8 kV Auxiliary switch 2.5 kV
•     Control pollution degree 3
•     Ambient temperature –30 ... +50°C
•     Non-operating temperature –40 ... +80°C
•     Ambient humidity 95% r.h., non-condensating
•     Maintenance Maintenance-free
•     Dimensions / Weight Dimensions See «Dimensions» on page 3
•     Weight Approx. 2.3 kg