Description
The SF24A-SR from Belimo is a high-performance modulating rotary actuator designed for adjusting dampers in technical building installations. This actuator is known for its reliability, precision, and ease of installation, making it an ideal choice for various HVAC applications.
- Application: Modulating rotary actuator with fail-safe functionality for adjusting dampers in technical building installations.
- Air Damper Size: Suitable for dampers up to approximately 4 m².
- Torque Motor: Delivers a torque of 20 Nm.
Electrical Data
- Nominal Voltage: AC/DC 24 V
- Nominal Voltage Frequency: 50/60 Hz
- Nominal Voltage Range: AC 19.2...28.8 V / DC 21.6...28.8 V
- Power Consumption in Operation: 5 W
- Power Consumption in Rest Position: 3 W
- Power Consumption for Wire Sizing: 7 VA
- Connection Supply / Control: Cable 1 m, 4x 0.75 mm²
- Parallel Operation: Yes (note the performance data)
Functional Data
- Torque Motor: 20 Nm
- Torque Fail-Safe: 20 Nm
- Operating Range Y: 2...10 V
- Input Impedance: 100 kΩ
- Position Feedback U: 2...10 V
- Position Feedback U Note: Max. 0.5 mA
- Position Accuracy: ±5%
- Direction of Motion Motor: Selectable with switch L/R
- Direction of Motion Fail-Safe: Selectable by mounting L/R
- Manual Override: By means of hand crank and locking switch
- Angle of Rotation: Max. 95°
- Angle of Rotation Note: Adjustable starting at 33% in 2.5% steps (with mechanical end stop)
- Running Time Motor: 150 s / 90°
- Running Time Fail-Safe: <20 s @ -20...50°C / <60 s @ -30°C
- Sound Power Level: 40 dB(A)
- Mechanical Interface: Universal shaft clamp 10...25.4 mm
- Position Indication: Mechanical
- Service Life: Min. 60,000 fail-safe positions
Safety Data
- Protection Class IEC/EN: III, Safety Extra-Low Voltage (SELV)
- Power Source UL: Class 2 Supply
- Degree of Protection IEC/EN: IP54
- Degree of Protection NEMA/UL: NEMA 2
- Enclosure UL: Enclosure Type 2
- EMC: CE according to 2014/30/EU
- Certification IEC/EN: IEC/EN 60730-1 and IEC/EN 60730-2-14
- UL Approval: cULus according to UL60730-1A, UL60730-2-14 and CAN/CSA E60730-1
- Hygiene Test: According to VDI 6022 Part 1 / SWKI VA 104-01, cleanable and disinfectable, low emission
- Type of Action: Type 1.AA
- Rated Impulse Voltage Supply / Control: 0.8 kV
- Pollution Degree: 3
- Ambient Humidity: Max. 95% RH, non-condensing
- Ambient Temperature: -30...50°C [-22...122°F]
- Storage Temperature: -40...80°C [-40...176°F]
- Servicing: Maintenance-free
- Weight: 2.2 kg
Operating Mode: The actuator moves the damper to the operating position while tensioning the return spring, with the damper returning to the fail-safe position when the supply voltage is interrupted.
Simple Direct Mounting: Features a universal shaft clamp for easy installation, including an anti-rotation device.
Manual Override: Equipped with a hand crank for manual actuation and engagement, which can be unlocked manually or automatically by applying the operating voltage.
Adjustable Angle of Rotation: The angle can be adjusted with mechanical end stops for precise control.
High Functional Reliability: The actuator is overload protected, requires no limit switches, and automatically stops when the end stop is reached.
Electrical Accessories:
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Auxiliary switch 2x SPDT (Type S2A-F)
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Feedback potentiometer 1 kΩ (Type P1000A-F)
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Signal converter voltage/current 100 kΩ 4...20 mA, Supply AC/DC 24 V (Type Z-UIC)
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Positioners for various mounting options (Types SGA24, SGE24, SGF24, CRP24-B1)
Mechanical Accessories:
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Shaft extension (Type AV8-25)
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End stop indicator (Type IND-AFB)
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Various shaft clamps and ball joints (Types K7-2, KH8 / KH10 KG10A, KH8, KH-AFB)
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Actuator arms and form fit inserts (Types ZF10-NSA-F, ZF12-NSA-F, ZF15-NSA-F, ZF16-NSA-F)
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Mounting kits and baseplate extensions (Types ZG-AFB, Z-SF, Z-ARS230L)
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Hand crank (Type ZKN2-B)
For more information and to explore our range of Belimo products, visit our website at https://ecospares.co.uk/collections/belimo. If you need any assistance, please get in touch with us.
