NMX24-SR Belimo Actuator

The Belimo NMX24-SR Actuator 24V 90inlb 2-10V. (also p/n NMB24-SR)

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Application for the Belimo NMX24-SR:

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 crankarm 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 500O 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 masterslave 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 NM series provides 95deg. 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 NMB24-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.

Specifications

Voltage AC/DC	AC/DC 24 V
Power Consumption (Running)	2.5 W
Power Consumption (Holding)	0.4 W
Power Consumption For Wire Sizing	5 VA
Torque	90 in-lb [10 Nm]
Control Type	DC 2…10 V
Direction Of Motion Motor	selectable with switch 0/1
Manual Override	External push button
Angle of Rotation	95
Running Time (Motor)	95 s / 90°
Running Time range (Motor)	45, 60, 150 s
Degree Of Protection NEMA	NEMA 2
Enclosure Type	UL Enclosure Type 2
Ambient Temperature	-22…122°F [-30…50°C]