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SKU
EF24A-S2
EF24A-S2 - Belimo Spring-return Damper Actuator 30 Nm, < 75 s, AC / DC 24 V, Open/Close, 2 x SPDT
£646.80
£539.00
On request
Next Supplier Stock Update: 18/10/2026
Manuals & Datasheets
| DATA-SHEET |
 |
| Product type | Actuator |
| IP rating | IP54 |
| Input Signal | On/Off |
| Manufacturer | Belimo |
| Power Supply | 24Vac/Vdc |
| Torque | 30 Nm |
| Running time | 65 to 80 sec |
| End Switches | 2 End Switches |
| Actuator type | Rotary |
| Fail Safe | Spring Return |
Find all parts for your ventilation system at iacs, the Free Delivery and 1-2 Delivery is available for all the Belimo Actuators in stock
The Belimo EF24A-S2 is a type of Actuator used in HVAC and ventilation systems.
The force applied by the Torque of the EF24A-S2 is 30 Nm.
The power supply requested for this Rotary Actuator is 24Vac/Vdc.
Find at IACS the ideal Belimo Actuator compatible with your system at the best price.
If you are unsure about size or installation, refer to the Belimo custom datasheet above or message iacs to receive special instructions and a custom quote.
EF24A-S2 - Spring-return actuator 30 Nm, < 75 s, AC / DC 24 V, Open/Close, 2 x SPDT
• IP 54, Manual override with integrated position stop
• Running time spring < 20 s
• Control Open/Close with single-wire contact
• Connection cable FRNC 1 m
• Spindle driver universal spindle clamp
• Auxiliary switch 2 integral
• Rating 1 mA...3(0.5)A, AC 250 V
• Spindle driver universal spindle clamp
• Direction of rotation reversible (right/left)
• Angle of rotation limit. mech. adjustable
Features
- Mode of operation The actuator moves the damper to the operating position at the same time as tensioning the return spring. The damper is turned back to the emergency position by spring force if the supply voltage is interrupted.
- Simple direct mounting Simple direct mounting on the damper spindle with a universal spindle clamp, supplied with ananti-rotation strap to prevent the
actuator from rotating - Simple direct mounting Simple direct mounting on the damper spindle with a universal spindle clamp, supplied with an anti-rotation strap to prevent the actuator from rotating.
- Spindle stabiliser The spindle clamp of the spring-return actuator is equipped ex-works with a spindle stabiliser for stabilising the combination of damper, damper spindle and actuator.
This is comprised of two plastic support rings and, depending on the installation situation and the spindle diameter, must be left in place or partially or completely removed.
Long spindle installation :• The use of the spindle stabiliser is necessary with long spindle installation with a spindle diameter of 12 to 20 mm.• The use of the spindle stabiliser is not necessary with long spindle installation with a spindle diameter of 21 to 26.7 mm, and it can be removed.
Short axis installation :• The necessity of the spindle stabiliser does not apply with short spindle installation; it can be removed or – if the length of the spindle permits it – left in the spindle clamp.
For additional information, see the Installation instructions. - Manual override Manual operation of the damper with the hand crank, locking in any position with the interlocking switch. Unlocking is manual or automatic by applying the operating voltage.
- Adjustable angle of rotation Adjustable angle of rotation with mechanical end stop.
- High operational reliability The actuator is overload-proof, requires no limit switches and automatically stops when the end stop is reached.
• Electrical data
• Nominal voltage AC 24 V, 50/60 Hz / DC 24 V
• Nominal voltage range AC 19.2 ... 28.8 V / DC 21.6 ... 28.8 V
• Power consumption In operation 9.5 W @ nominal torque
• At rest 4.5 W
• For wire sizing 16 VA
• Auxiliary switch 2 x SPDT, 1 mA ... 3 (0.5) A, AC 250 V (1 x fix 10% / 1 x adjustable 10 ... 90%)
• Connection Motor Cable 1 m, 2 x 0.75 mm2
• Auxiliary switch Cable 1 m, 6 x 0.75 mm2
• Functional data Torque (nominal torque) Motor Min. 30 Nm @ nominal voltage
• Direction of rotation Motor Can be selected by mounting L / R
• Manual override With hand crank and interlocking switch
• Angle of rotation Max. 95°, can be limited with adjustable mechanical end stop
• Running time Motor <=75 s (0 ... 30 Nm)
• Spring return <=20 s @ –20 ... 50°C / max. 60 s @ –30°C
• Sound power level Motor =55 dB (A)
• Spring return =71 dB (A)
• Service life Min. 60,000 emergency positions
• Position indication Mechanical
• Safety Protection class III Extra low voltage UL Class 2 Supply
• Degree of protection IP54 NEMA2, UL Enclosure Type 2
• EMC CE according to 2004/108/EC
• Low-voltage directive CE according to 2006/95/EC
• Certification Certified to IEC/EN 60730-1 and IEC/EN 60730-2-14 cULus according to UL 60730-1A and UL 60730-2-14 and CAN/CSA E60730-1:02
• Mode of operation Type 1.AA.B
• Rated impulse voltage Actuator 0.8 kV
• Auxiliary switch 2.5 kV
• Control pollution degree 3
• Ambient temperature –30 ... +50°C
• Non-operating temperature –40 ... +80°C
• Ambient humidity 95% r.h., non-condensating
• Maintenance Maintenance-free
• Dimensions / Weight Dimensions See «Dimensions» on page 3
• Weight Approx. 4.4 kg
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