EFB24-SR-S N4
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Damper Actuator, 270 in-lb [30 Nm], Spring return, AC/DC 24 V, DC 2…10 V, 2 x SPDT, NEMA 4
| Weight | 12 lbs |
|---|---|
| Torque | 270 in-lb [30 Nm] |
| Brand | Belimo |
| Voltage | AC/DC 24 V |
| Auxiliary Switch | 2 SPDT |
| Actuator Type | Spring return |
| Control type | Modulating |
- Torque motor
- 270 in-lb [30 Nm]
- Power consumption in operation
- 8 W
- Power consumption in rest position
- 4.5 W
- Transformer sizing
- 14 VA (class 2 power source)
- Ambient humidity
- 5...95% r.H. non-condensing
- Housing material
- Aluminum die cast and plastic casing
- Electrical Connection
- Terminal block(s) inside junction box with knockouts
- Auxiliary switch
- 2 x SPDT, 3A resistive (0.5A inductive) @ 250 VAC, one set at 10°, one set at 85°
- Manual override
- 5 mm hex crank (3/16" Allen), supplied
- Angle of rotation
- Max. 95°, adjustable with mechanical end stop, 35...95°
- Position indication
- visual indicator, 0° to 95° (0° is full spring return position)
- Ambient temperature
- -22...122°F [-30...50°C]
- Non-operating temperature
- -40...176°F [-40...80°C]
- Control
- Modulating
- Control operating range Y note
- 4...20 mA w/ ZG-R01 (500 Ω, 1/4 W resistor)
- Position Feedback
- DC 2...10 V, Max. 0.5 mA
- direction of rotation motor
- reversible with built-in switch
- Overload Protection
- electronic throughout 0° to 95° rotation
- Input Impedance
- 100 kΩ for DC 2...10 V (0.1 mA), 500 Ω for 4...20 mA
- Degree of Protection
- IP66, NEMA 4, UL Enclosure Type 4
- Nominal voltage
- AC/DC 24 V
- Nominal voltage frequency
- 50/60 Hz
- Power Supply
- 24 VAC, ±20%, 50/60 Hz, 24 VDC, -10% / +20%
- Power supply tolerance AC
- ±20%
- Power supply tolerance DC
- -10% / +20%
- Agency Listing
- cULus acc. to UL60730-1A/-2-14, CAN/CSA E60730-1:02, CE acc. to 2004/108/EC and 2006/95/EC
- Operating Range
- DC 2...10 V, 4...20 mA w/ ZG-R01 (500 Ω, 1/4 W resistor)
- Emergency control function
- Spring Return
- Product family
- Damper Actuator
- direction of rotation spring-return
- reversible with cw/ccw mounting
- Noise level, motor
- ≤56.5 dB (A)
- Shaft Diameter
- 1/2" to 1.05" round, centers on 3/4" with insert, 1.05" without insert
- Electrical accessories
- ADS-100|IRM-100|P475|P475-1|PS-100|PTA-250|SGA24|SGF24|ZG-R01|ZG-R02|ZG-SGF|ZG-X40
- Mechanical accessories
- AV8-25|EF-P|IND-EFB|K9-2|KG10A|KH10|KH-EFB|SH10|TOOL-07|ZG-100|ZG-120|ZG-DC1|ZG-DC2|ZG-EFB|ZG-JSA-3
- Family Series
- EF Series
- Noise Level (Fail-Safe)
- ≤71 dB (A)
- Running time (Fail-Safe)
- <20 seconds
- Running Time (Motor)
- 95 sec
- Running Time (Fail-Safe)
- <20 sec @ -4...122°F [-20...50°C], <60 sec @ -22°F [-30°C]
- Fail-Safe function
- Spring return
- Control type
- Modulating
- Connection
- terminals
- Degree of protection IEC/EN
- IP66
- Degree of protection NEMA/UL
- NEMA 4
- Enclosure
- UL Enclosure Type 4
- Auxiliary Switch
- 2 SPDT
- CAD ThomasNetLink
- EFB24-SR-S N4
- Product Features
- Torque min. 270 in-lb, for control of air dampers
- Electrical Protection
- actuators are double insulated
- Operation
- The EF..24-SR-S N4 series actuators provide true spring return operation for reliable failsafe application and positive close off on air tight dampers. The spring return system provides constant torque to the damper with, and without, power applied to the actuator. The EF..24-SR-S N4 series provides 95° of rotation and is provided with a graduated position indicator showing 0° to 95°. The EF..24-SR-S N4 uses a brushless DC motor which is controlled by an Application Specific Integrated Circuit (ASIC) and a microprocessor. The microprocessor provides the intelligence to the ASIC to provide a constant rotation rate and to know the actuator’s exact fail-safe position. The ASIC monitors and controls the brushless DC motor’s rotation and provides a digital rotation sensing function to prevent damage to the actuator in a stall condition. The actuator may be stalled anywhere in its normal rotation without the need of mechanical end switches. The EF..24-SR-S N4 versions are provided with two built-in auxiliary switches. These SPDT switches provide safety interfacing or signaling, for example, for fan start-up. The switching function at the fail-safe position is fixed at 10°, the other switch function is fixed at 85°. The EF..24-SR-S N4 actuator is shipped at 5° (5° from full fail-safe) to provide automatic compression against damper gaskets for tight shut-off. Installation Note: Use 60°C/75°C copper (CU) conductor and wire size range 12-26 AWG, stranded or solid. If conduit is used, use flexible metal conduit; UL listed and CSA certified strain relief or conduit fitting suitable for outdoor applications, rated NEMA type 4, 4X, 6 or 6X or watertight.
- Application
- For fail-safe, modulating control of dampers in HVAC systems. Actuator sizing should be done in accordance with the damper manufacturer’s specifications. The actuator is mounted directly to a damper shaft up to 1.05” in diameter by means of its universal clamp. A crank arm and several mounting brackets are available for applications where the actuator cannot be direct coupled to the damper shaft. The actuator operates in response to a 2 to 10 VDC or, with the addition of a 500Ω resistor, a 4 to 20 mA control input from an electronic controller or positioner. A 2 to 10 VDC feedback signal is provided for position indication. Not to be used for a master-slave application.
- Typical Specification
- Spring return control damper actuators shall be direct coupled type which require no crank arm and linkage and be capable of direct mounting to a jackshaft up to a 1.05” diameter. The actuator must provide modulating damper control in response to a 2 to 10 VDC or, with the addition of a 500Ω resistor, a 4 to 20 mA control input from an electronic controller or positioner. The actuators must be designed so that they may be used for either clockwise or counter clockwise fail-safe operation. Actuators shall use a brushless DC motor controlled by a microprocessor and be protected from overload at all angles of rotation. Run time shall be constant, and independent of torque. A 2 to 10 VDC feedback signal shall be provided for position feedback. Actuators with auxiliary switches must be constructed to meet the requirements for Double Insulation so an electrical ground is not required to meet agency listings. Actuators shall be cULus listed and have a 5 year warranty, and be manufactured under ISO 9001 International Quality Control Standards. Actuators shall be as manufactured by Belimo.
- CP65 Warning
- ⚠ WARNING: For Belimo Products sold in California, these Products do or may contain chemicals which are known to the State of California to cause cancer and or birth defects or other reproductive harms. For more information see www.p65warnings.ca.gov.
Datasheet Download: Datasheet
Installation instructions Download: Installation instructions
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