SF24A-SZ - Belimo Spring-return Damper Actuator

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The Belimo SF24A-SZ is a type of Actuator used in HVAC and ventilation systems.

The force applied by the Torque of the SF24A-SZ is 20 Nm.

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

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Consult the Belimo custom datasheet above or contact iacs via email for personalised assistance if you have queries about size or installation.

SF24A-SZ  - Spring-return actuator

•    20 Nm, < 150 s, 95°
•    AC / DC 24 V, modulating
•    IP 54, Manual override with integrated position stop
•    Running time spring < 20 s
•    Control DC 0...10 V
•    Operating range DC 0.5...10 V
•    Position feedback DC 0.5...10 V
•    Connection PVC cable 1m
•    Spindle driver universal spindle clamp
•    Direction of rotation reversible (right/left)

Features
 

• Mode of operation The actuator is controlled with a standard signal of DC 0 ... 10 V and moves the damper to the operating position at the same time as tensioning the return spring. The damper is turned back to the emergency position by spring force if the supply voltage is interrupted.


• Simple direct mounting Simple direct mounting on the damper spindle with a universal spindle clamp, supplied with an anti-rotation strap to prevent the actuator from rotating.


• Manual override Manual operation of the damper with the hand crank, locking in any position with the interlocking switch.
  
  

• Adjustable angle of rotation Adjustable angle of rotation with mechanical end stop.
  
   
• High operational reliability The actuator is overload-proof, requires no limit switches and automatically stops when the end stop is reached. 

•     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 3 W For wire sizing 7 VA
•     Connection Cable 1 m, 3 x 0.75 mm2
•     Functional data Torque Motor Min. 20 Nm @ nominal voltage Spring return Min. 20 Nm
•     Control Control signal Y DC 0 … 10 V, input impedance 100 k� Operating range DC 2 … 10 V
•     DC 2 … 10 V DC 2 … 10 V, max. 0.5 mA
•     Position accuracy ±5%
•     Direction of rotation Motor Reversible with switch Spring return 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 ≤150 s (0 ... 20 Nm) Spring return ≤20 s @ –20 ... 50°C / max. 60 s @ –30°C
•     Sound power level Motor ≤40 dB (A) @ 150 s running time Spring return ≤62 dB (A)
•     Service life Min. 60,000 emergency positions
•     Position indication Mechanical
•     Safety Protection class III Extra low voltage UL Class 2 Supply
•     Degree of protection IP54 NEMA2, UL Enclosure Type 2
•     EMC CE according to 2004/108/EC
•     Certification Certified to IEC/EN 60730-1 and IEC/EN 60730-2-14 cULus according to UL 60730-1A and UL 60730-2-14 and CAN/CSA E60730-1:02
•     Mode of operation Type 1.AA
•     Rated impulse voltage 0.8 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. 2.1 kg