Belimo Rotary Actuator SF24A-S2

Belimo Rotary Actuator SF24A-S2

Brand: Belimo
Part Number: SF24A-S2

Rotary actuator fail-safe for adjusting

dampers in technical building installations

• Air damper size up to approx. 4 m²

• Torque motor 20 Nm

• Nominal voltage AC/DC 24 V

• Control Open/close

• with 2 integrated auxiliary switches

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 2.5 W
• Power consumption for wire sizing 7.5 VA
• Auxiliary switch 2 x SPDT, 1 x 10% / 1 x 11…90%
• Switching capacity auxiliary switch 1 mA…3 A (0.5 A inductive), AC 250 V
• Connection supply / control Cable 1 m, 2 x 0.75 mm²
• Connection auxiliary switch Cable 1 m, 6 x 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 adjustable starting at 33% in 2.5% steps (with mechanical end stop)
• Running time motor 75 s / 90°
• Running time fail-safe <20 s / 90° <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 III, Safety Extra-Low Voltage (SELV)
• Power source UL Class 2 Supply
• 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
• Certification UL cULus according to UL60730-1A, UL60730-2-14 and CAN/CSA E60730-1
• The UL marking on the actuator depends on
• the production site, the device is UL-compliant in any case