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NMX24-SR

NMX24-SR
MSRP: $500.00
Price: $227.50
You Save: $272.50 (55 %)

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Belimo Part Number: NMX24-SR

Proportional Control, Non-Spring Return, 24 V Power, 2 to 10 VDC or 4 to 20 mA control signal


Application

For 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 Ω 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.


Operation

The 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.

Technical Data Sheet

Fail-SafeNon-Spring Return
Torque90 in-lb [10 Nm]
Control InputOn/Off
Input Impedance100 kΩ (0.1 mA), 500 Ω
Position Feedback--
Running Time (motor)150, 95, 60 or 45 seconds constant, independent of load
Running Time (fail-safe)--
Auxiliary Switch--
Power Supply24 VAC ± 20%, 50/60 Hz, 24 VDC ± 10%
Power Consumption2.5 W,0.4 W
Transformer Sizing5 VA (class 2 power source)
Electrical Connection18 GA plenum rated cable with 1/2" conduit connector protected NEMA 2 (IP54) 3ft [1m] 10 ft [3m] and 16 ft [5m]
Overload Protectionelectronic throughout 0 to 95° rotation
Shaft DiameterStandard: 1/2" to 1.05" round, centers on 1/2" and 3/4" with insert, 1.05" without insert
Angle of Rotationmax. 95°, adjustable with mechanical stop
Direction of Rotation (motor)reversible with switch
Direction of Rotation (fail-safe)--
Position Indicationreflective visual indicator (snap on)
Manual Overrideexternal push button
Humidity5 to 95% RH non condensing (EN 60730-1)
Ambient Temperature-22°F to +122°F [-30°C to +50°C]
Ambient Temperature (safety)--
Storage Temperature-40°F to +176°F [-40°C to +80°C]
Noise Level<45 dB (A)
Housing MaterialUL94-5VA
HousingNEMA 2, IP54, UL enclosure type 2
Agency ListingcULus acc. To UL60730-1A/-2-14, CAN/CSA E60730-1:02, CE acc. To 2004/108/EC & 2006/95/EC
Quality StandardsISO 9001
Weight1.7 lbs (0.75 kg)
Item Number: NMX24-SR
Manufacturer: Belimo
Manufacturer Part No: NMX24-SR

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