Description
The Belimo SFA-S2 is a high-performance rotary actuator designed for adjusting dampers in technical building installations. It is perfect for controlling air dampers up to approximately 4 m², ensuring reliable and efficient operation in various applications.
Simple Direct Mounting: This actuator offers straightforward, direct mounting on the damper shaft using a universal shaft clamp. It is supplied with an anti-rotation device to prevent the actuator from rotating, ensuring stable and reliable operation.
Manual Override: The SFA-S2 features a manual override function that allows the damper to be manually actuated using a hand crank. The damper can be engaged with the locking switch at any position, which can then be unlocked manually or automatically by applying the operating voltage.
Adjustable Angle of Rotation: The angle of rotation can be adjusted with mechanical end stops, providing flexibility and precision in damper control.
High Functional Reliability: This actuator is overload protected and does not require limit switches, as it automatically stops when the end stop is reached, ensuring high functional reliability.
Flexible Signalling: The actuator includes one auxiliary switch with a fixed setting and one adjustable auxiliary switch. These switches allow for signalling at a 10% or 11...100% angle of rotation, providing versatile feedback options for various applications.
Electrical Accessories:
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Auxiliary Switch: 2x SPDT S2A-F
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Feedback Potentiometer: 1 kΩ P1000A-F
Mechanical Accessories:
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Shaft Extension: 240 mm ø20 mm for damper shaft ø8...22.7 mm AV8-25
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End Stop Indicator: IND-AFB
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Shaft Clamp: Reversible, for central mounting, for damper shafts ø12.7 / 19.0 / 25.4 mm K7-2
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Ball Joint: Suitable for damper crank arm KH8 / KH10 KG10A
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Damper Crank Arm: Slot width 8.2 mm, clamping range ø10...18 mm KH8
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Actuator Arm: For 3/4" shafts, clamping range ø10...22 mm, Slot width 8.2 mm KH-AFB
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Form Fit Insert: Available in various sizes (10x10 mm, 12x12 mm, 15x15 mm, 16x16 mm)
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Mounting Kit: For linkage operation, for flat and side installation ZG-AFB
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Baseplate Extension: Z-SF
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Anti-Rotation Mechanism: 230 mm, Multipack 20 pcs. Z-ARS230L
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Hand Crank: 63 mm ZKN2-B
Electrical Data
- Nominal Voltage: AC 24...240 V / DC 24...125 V
- Nominal Voltage Frequency: 50/60 Hz
- Nominal Voltage Range: AC 19.2...264 V / DC 21.6...137.5 V
- Power Consumption in Operation: 7 W
- Power Consumption in Rest Position: 3.5 W
- Power Consumption for Wire Sizing: 18 VA
- Auxiliary Switch: 2x SPDT, 1x 10% / 1x 11...100%
- Switching Capacity Auxiliary Switch: 1 mA...3 A (0.5 A inductive), DC 5 V...AC 250 V
- Connection Supply / Control: Cable 1 m, 2x 0.75 mm²
- Connection Auxiliary Switch: Cable 1 m, 6x 0.75 mm²
- Parallel Operation: Yes (note the performance data)
Functional Data
- Torque Motor: 20 Nm
- Torque Fail-Safe: 20 Nm
- Direction of Motion Motor: Selectable by mounting 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: Can be limited by the adjustable mechanical end stop
- Running Time Motor: 75 s / 90°
- Running Time Fail-Safe: <20 s @ -20...50°C / <60 s @ -30°C
- Sound Power Level, Motor: 45 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: II, reinforced insulation
- Protection Class UL: II, reinforced insulation
- Protection Class Auxiliary Switch IEC/EN: II, reinforced insulation
- 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
- Low Voltage Directive: CE according to 2014/35/EU
- Certification IEC/EN: IEC/EN 60730-1 and IEC/EN 60730-2-14
Additional Specifications
- 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.B
- Rated Impulse Voltage Supply / Control: 4 kV
- Rated Impulse Voltage Auxiliary Switch: 2.5 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: 2.3 kg
Why Choose the Belimo SFA-S2?
The Belimo SFA-S2 rotary actuator is ideal for precise damper control in HVAC systems. Its robust design, wide operating voltage range, and high torque output ensure reliable performance in various environments. With features like a manual override, adjustable angle of rotation, and flexible signalling through auxiliary switches, the SFA-S2 offers unmatched flexibility and ease of use. Additionally, its compliance with international safety and hygiene standards makes it suitable for diverse applications, including those requiring stringent hygiene controls.
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 contact us.
