Description
The LF24-SR Rotary Actuator by Belimo is a fail-safe actuator designed for adjusting dampers in technical building installations. This robust and reliable actuator is ideal for air damper sizes up to approximately 0.8 m². With a modulating control range of 2...10 V and position feedback capabilities, it ensures precise and efficient damper control, enhancing the overall performance of HVAC systems.
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: 2.5 W
- Power Consumption in Rest Position: 1 W
- Power Consumption for Wire Sizing: 5 VA
- Connection Supply / Control: Cable 1 m, 4x 0.75 mm²
- Parallel Operation: Yes (note the performance data)
Functional Data:
- Torque Motor: 4 Nm
- Torque Fail-Safe: 4 Nm
- Operating Range Y: 2...10 V
- Input Impedance: 100 kΩ
- Position Feedback U: 2...10 V
- Position Feedback U Note: Max. 0.7 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: No
- Angle of Rotation: Max. 95°
- Angle of Rotation Note: Adjustable 37...100% with integrated mechanical limitation
- Running Time Motor: 150 s / 90°
- Running Time Fail-Safe: <20 s @ -20...50°C / <60 s @ -30°C
- Sound Power Level, Motor: 30 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)
- 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
- 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: 1.5 kg
Operating Mode: The actuator is connected with a standard control signal of 0...10 V and moves the damper to the operating position while tensioning the return spring. The damper returns to the fail-safe position by spring force when the supply voltage is interrupted.
Simple Direct Mounting: Easy direct mounting on the damper shaft with a universal shaft clamp, including an anti-rotation device.
Adjustable Angle of Rotation: Mechanically adjustable angle of rotation with integrated end stops.
High Functional Reliability: The actuator is overload protected, requires no limit switches, and automatically stops when the end stop is reached.
Additional Accessories:
- Electrical Accessories:
- Auxiliary switch 2x SPDT (Type: S2A-F)
- Feedback potentiometer 1 kΩ (Type: P1000A-F)
- Signal converter voltage/current 100 kΩ 4...20 mA, Supply AC/DC 24 V (Type: Z-UIC)
- Positioners for various mounting types (Types: SGA24, SGE24, SGF24, CRP24-B1)
- Mechanical Accessories:
- Shaft extension 170 mm ø10 mm for damper shaft ø6...16 mm (Type: AV6-20)
- Shaft clamp reversible, clamping range ø16...20 mm (Type: K6-1)
- Ball joint suitable for damper crank arm (Types: KH8, KH10, KG10A, KG8)
- Damper crank arm Slot width 8.2 mm, clamping range ø10...18 mm (Type: KH8)
- Actuator arm, clamping range ø8...16 mm, Slot width 8.2 mm (Type: KH-LF)
- Angle of rotation limiter, with end stop (Type: ZDB-LF)
- Form fit adapter 8x8 mm (Type: ZF8-LF)
- Mounting kits for linkage operation (Types: ZG-LF1, 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 https://ecospares.co.uk/collections/belimo. If you need any assistance, please get in touch with us on 01772 284 626.
