SF24G-SR-S2-L - Belimo Spring-return Damper Actuator 20 Nm, 150 s / 90°, 90°

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The Belimo SF24G-SR-S2-L is a kind of Actuator used in HVAC applications and air ventilation systems.

The Torque used by the SF24G-SR-S2-L is 20 Nm.

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

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If you have questions about size or installation, consult the Belimo custom datasheet above or send an email to iacs to get personalised guidance.

SF24G-SR-S2-L - Spring-return actuator 20 Nm, 150 s / 90°, 90°

•    AC / DC 24 V, modulating, 2 x SPDT
•    IP 66 NEMA4, Manual override with integrated position stop
•    Running time spring < 20 s / ccw
•    Control DC 0...10 V, adjustable
•    Operating range DC 2...10 V, adjustable
•    Position feedback DC 2...10 V, adjustable
•    Connection cable FRNC 1 m
•    Spindle driver universal spindle clamp
•    Angle of rotation limit. mech. adjustable

Features
 

• Fields of application The actuator is particularly suitable for utilisation in outdoor applications and is protected against the following weather conditions:
  – UV radiation
  – rain / snow
  – dirt / dust
  – humidity 
  – Changing atmosphere / frequent and severe temperature fluctuations (recommendation: use the actuator with integrated factory-installed heating which can be ordered separately to prevent internal condensation *) 


• 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. Unlocking is manual or automatic by applying the operating voltage.The housing cover must be removed to set the manual override.


• Adjustable angle of rotation Adjustable angle of rotation with mechanical end stop.The housing cover must be removed to set the angle of rotation


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


• Flexible signalization The actuator has one auxiliary switch with a fixed setting and one adjustable auxiliary switch. They permit a 10% or 10 ... 90% angle of rotation to be signalled.

•     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 (lmax 20 A @ 5 ms)
•     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, 4 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 
•     Control Control signal Y DC 0 … 10 V, input impedance 100 ka Operating range DC 0.5 ... 10 V
•     Position feedback (measuring voltage U) DC 0.5 ... 10 V, max. 0.5 mA
•     Position accuracy ±5%
•     Direction of rotation Motor Reversible with switch  / Spring return L (ccw)
•     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 / 90°<) 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 Mechanica
•     Safety Protection class III Safety extra-low voltage UL Class 2 Supply
•     Protection mode IP66 NEMA 4, UL Enclosure Type 4
•     EMC CE according to 2004/108/EC Low-voltage directive CE according to 2006/95/EC
•     Certification Certified to IEC/EN 60730-1 and IEC/EN 60730-2-14cULus according to UL 60730-1 and UL 60730-2-14and CAN/CSA E60730-1:02
•     Mode of operation Type 1.AA
•     Rated impulse voltage 0.8 kV 
•     Control pollution degree 4
•     Ambient temperature –30 ... +50°C
•     Non-operating temperature –40 ... +80°C
•     Ambient humidity 100% r.h., non-condensating
•     Maintenance Maintenance-free
•     Dimensions / Weight Dimensions See «Dimensions» on page 3
•     Weight Approx. 5.3 kg