Belimo Part: NMB24-3
Torque min. 90 in-lb for control of damper surfaces up to 22 sq ft.
Application
Damper Actuator for HVAC Temperature Control.
Valve Actuator for HVAC Temperature Control.
For on/off and floating point control of dampers in HVAC systems. Actuator sizing should be done in accordance with the damper manufacturers 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.
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)24-3 actuators use a sensorless brushless DC motor, which is controlled by an Application Specific Integrated Circuit (ASIC). The ASIC monitors and controls the actuators 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 Attributes |
| Product: NMB24-3 |
|
| Fail-Safe | Non-Spring |
| Torque | 90 in-lb [10 Nm] |
| Control Input | On/Off, Floating Point |
| Input Impedance | 600 |
| Position Feedback | -- |
| Running Time (motor) | 95 seconds, independent of load |
| Running Time (fail-safe) | -- |
| Auxiliary Switch | -- |
| Power Supply | 24VAC 20%, 50/60 Hz, 24VDC 10% |
| Power Consumption | running: 2.0 W, holding: 0.2 W |
| Transformer Sizing | 4.0 VA (class 2 power source) |
| Electrical Connection | 3 ft, 18 GA plenum rated cable with 1/2" conduit connector |
| Overload Protection | electronic thoughout 0 to 95 rotation |
| Shaft Diameter | Standard: 1/2" to 1.05" round, centers on 1/2" and 3/4" with insert, 1.05 without insert |
| Angle of Rotation | max. 95, adjustable with mechanical stop |
| Direction of Rotation (motor) | Reversible with switch |
| Direction of Rotation (fail-safe) | -- |
| Position Indication | reflective visual indicator (snap on) |
| Manual Override | external push button |
| Humidity | 5 to 95% RH non condensing (EN 60730-1) |
| Ambient Temperature | -22F to 122F [-30C to 50C] |
| Ambient Temperature (safety) | -- |
| Storage Temperature | -40F to 176F [-40C to 80C] |
| Noise Level | max 45 db (A) |
| Housing Material | UL94-5VA |
| Housing | NEMA 2, IP54, UL enclosure type 2 |
| Agency Listing | cULus acc. to UL60730-1A/-2-14, CAN/CSA E60730-1:02, CE acc. to 2004/108/EEC and 2006/95/EC |
| Quality Standards | ISO 9001 |
| Weight | 1.7 lbs (0.75 kg) |
Item Number:
NMB24-3
Manufacturer:
Belimo
Manufacturer Part No:
NMB24-3