Belimo Aircontrols (USA), Inc. NMB24-SR NMB Series Direct Coupled Non-Spring Return Actuat

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List Price$522.00
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NMB Series Direct coupled non-spring return actuator, 70in-lb minimum torque

Actuator TypeNon fail-safe
Control TypeModulating
Electrical Connectioncable
Running time95 seconds
VoltageAC/DC 24�V
Angle of Rotation95�
Direction of Rotation (Motor)reversible with built-in switch
Power Consumption (Holding)0.4�W
Power Consumption (Running)2.5 W
Degree of ProtectionNEMA�2, UL�Enclosure�Type�2
Shaft Diameter1/2" to 1.05" round, centers on 1/2" and 3/4" with insert, 1.05" without insert
Torque90 in-lbs [10 Nm]
Safety FunctionNO
Manual Overrideexternal push button
ApplicationFor proportional modulation 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, 1/2? self centered default. 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 500 � 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 or master-slave applications
Weight1.7 lbs [0.75 kg]
Servicingmaintenance free
Power Supply24 VAC � 20% 50/60 Hz 24 VDC � 10%
Transformer Sizing5 VA (Class 2 power source)
Electrical Connection18 GA plenum rated cable 1/2? conduit connector protected NEMA 2 (IP54) 3 ft [1m] 10 ft [3m] 16 ft [5m]
Overload Protectionelectronic throughout 0 to 95� rotation
Input Impedance100 k� (0.1 mA), 500 �
Angle of Rotationmax. 95�, adjustable with mechanical stop
Manual Overrideexternal push button
HousingNEMA 2, IP54, UL enclosure type 2
Agency ListingscULus acc. to UL 60730-1A/-2-14, CAN/CSA E60730-1:02, CE acc. to 2004/108/EEC and 2006/95/EC
Quality StandardISO 9001
Operating Range Y2 to 10 VDC, 4 to 20 mA
Position Indicationreflective visual indicator (snap-on)
Housing MaterialUL94-5VA
Ambient temperature-22�F to 122�F [-30�C to 50�C]
Noise level<45dB(A)
Humidity5 to 95% RH non condensing (EN 60730-1)
Running Time150 seconds 95 seconds 60 seconds 45 seconds constant independent of load
Direction of Rotationreversible with switch actuator will move: =CCW with decreasing control signal (10 to 2V) =CW with decreasing control signal (10 to 2V)
Torque90 in-lb [10 Nm]
Storage temperature-40�F to 176�F [-40�C to 80�C]
Power consumption2.5 W (0.4 W)
OperationThe actuator is not provided with and does not require any limit switches, but is electronically protected against overload. The anti-rotation strap supplied with the actuator will prevent lateral movement. The NMB(X) series provides 95� of rotation and a visual indicator indicates position of the actuator. When reaching the damper or actuator end position, the actuator automatically stops. The gears can be manually disengaged with a button on the actuator cover. The NMB(X)24-SR? actuators use a sensorless brushless DC motor, which is controlled by an Application Specific Integrated Circuit (ASIC). The ASIC monitors and controls the actuator?s rotation and provides a digital rotation sensing (DRS) function to prevent damage to the actuator in a stall condition.Power consumption is reduced in holding mode. Add-on auxiliary switches or feedback potentiometers are easily fastened directly onto the actuator body for signaling and switching functions
Typical SpecificationProportional control damper actuators shall be electronic direct-coupled type, which require no crank arm and linkage and be capable of direct mounting to a shaft up to 1.05? diameter. Actuators must provide proportional damper control in response to a 2 to 10 VDC or, with the addition of a 500 � resistor, a 4 to 20 mA control input from an electronic controller or positioner. Actuators shall have brushless DC motor technology and be protected from overload at all angles of rotation. Actuators shall have reversing switch and manual override on the cover. If required, actuator will be provided with screw terminal strip for electrical connections (NMX24-SR-T). Run time shall be constant and independent of torque. A 2 to 10 VDC feedback signal shall be provided for position indication. Actuators shall be cULus listed, have a 5-year warranty, and be manufactured under ISO 9001 International Quality Control Standards. Actuators shall be as manufactured by Belimo.

Product Family

Model NumberDecriptionManufacturerPriceAvail. Qty 
NMB24MFTUS NMB Series Direct Coupled Non-Spring Return Actuator, 70 in-lb minimum torque Belimo Aircontrols (USA), Inc. $297.45 0    Add To Cart
NMB24SR NMB Series Direct Coupled Non-Spring Return Actuat Belimo Aircontrols (USA), Inc. $234.90 154    Add To Cart
NMB24US NMB Series Direct Coupled Non-Spring Return Actuator, 70 in-lb minimum torque Belimo Aircontrols (USA), Inc. Call for Pricing 0    View More Info

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