EFB24-SR N4

$495.47

Each
Damper Actuator, 270 in-lb [30 Nm], Spring return, AC/DC 24 V, DC 2...10 V, NEMA 4
Fail-safe position
Weight 12 lbs
Torque

270 in-lb [30 Nm]

Voltage

AC/DC 24 V

Actuator Type

Spring return

Control type

Modulating

Brand

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
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
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
CAD ThomasNetLink
EFB24-SR N4
Product Features
Torque min. 270 in-lb, for control of air dampers
Electrical Protection
actuators are double insulated
Operation
The EF..24-SR 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 N4 series provides 95° of rotation and is provided with a graduated position indicator showing 0° to 95°. The EF..24-SR 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 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.

Installation instructions Download: Installation instructions

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