Description
The Belimo LF24-S Rotary Actuator is a fail-safe actuator designed for adjusting dampers in technical building installations. It is suitable for air dampers up to approximately 0.8 m² and ensures reliable and efficient performance. With a robust torque motor, high functional reliability, and flexible signalling capabilities, the LF24-S is an ideal solution for HVAC applications.
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- Nominal Voltage: AC/DC 24 V
- Torque Motor: 4 Nm
- Control Type: Open/close
- Integrated Auxiliary Switch: Yes, with SPDT
- Manual Override: Not available
- Adjustable Angle of Rotation: Max. 95°, adjustable 37-100%
- High Functional Reliability: Overload protected, no limit switches required
Electrical Data:
- 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: 2.5 W
- Power Consumption for Wire Sizing: 7 VA (Imax 5.8 A @ 5 ms)
- Connection Supply / Control: Cable 1 m, 2x 0.75 mm²
- Connection Auxiliary Switch: Cable 1 m, 3x 0.75 mm²
- Parallel Operation: Yes
Functional Data:
- Torque Fail-Safe: 4 Nm
- Direction of Motion Motor: Selectable by mounting L/R
- Direction of Motion Fail-Safe: Selectable by mounting L/R
- Angle of Rotation: Max. 95°
- Running Time Motor: 75 s / 90°
- Running Time Fail-Safe: <20 s @ -20...50°C / <60 s @ -30°C
- Sound Power Level, Motor: 50 dB(A)
- Mechanical Interface: Universal shaft clamp 8...16 mm
- Position Indication: Mechanical
- Service Life: Min. 60,000 fail-safe positions
Safety Data:
- Protection Class IEC/EN: III, Safety Extra-Low Voltage (SELV)
- Protection Class Auxiliary Switch IEC/EN: II, reinforced insulation
- Degree of Protection IEC/EN: IP54
- 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
- Hygiene Test: According to VDI 6022 Part 1 / SWKI VA 104-01, cleanable and disinfectable, low emission
- Type of Action: Type 1.B
- Rated Impulse Voltage Supply / Control: 0.8 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: 1.5 kg
Electrical Accessories: Auxiliary switch 2x SPDT (Type: S2A-F), Feedback potentiometer 1 kΩ (Type: P1000A-F)
Mechanical Accessories: Shaft extension 170 mm ø10 mm (Type: AV6-20), Shaft clamp reversible ø16...20 mm (Type: K6-1), Ball joint suitable for damper crank arm (Type: KH8 / KH10), Damper crank arm (Type: KH8), Actuator arm (Type: KH-LF)
Mounting Kits: For linkage operation, flat installation (Type: ZG-LF1), side installation (Type: ZG-LF3)
Anti-Rotation Mechanism: 180 mm, Multipack 20 pcs. (Type: Z-ARS180L)
For more information and to explore our range of Belimo products, visit our website at [Eco Spares](https://ecospares.co.uk/collections/belimo). If you need any assistance, please get in touch with us on 01772 284 626.
