NMQ24-MFT US | Damper Actuator | 70 in-lb | Non-Spg Rtn | 24V | Modulating | Belimo (OBSOLETE)

Damper Actuator | 70 in-lb | Non-Spg Rtn | 24V | Modulating

Application

For proportional modulation of dampers in HVAC systems with fast running requirements, or some Laboratory fume hoods. The NMQ24-MFT US is a non-spring return type actuator. When supply power is removed the actuator will maintain its last position.

Default/Configuration

The default parameters for 2 to 10 VDC applications of the NMQ24-MFT US actuator are assigned during manufacturing. If necessary, custom versions of the actuators can be ordered. The parameters noted in the Technical Data table are variable.

These parameters can only be changed by pre-set configurations from Belimo.

Operation

The NMQ24-MFT US actuator provides 95° of rotation and is provided with a position indicator. Upon installation and wiring the manual override push button must be pressed twice, so the actuator will perform an adaptation and use the new mechanical points for zero position during normal control operations.

The actuator 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 position. The ASIC monitors and controls the brushless DC motor’s rotation and provides a Digital Rotation Sensing (DRS) function to prevent damage to the actuator in a stall condition. The position feedback signal is generated with out the need for mechanical feedback potentiometers using DRS. The actuator may be stalled anywhere in its normal rotation without the need of mechanical end switches.

Installation

The NMQ24-MFT US is mounted directly to control shafts up to 3/4” diameter by means of its universal clamp and anti-rotation bracket. The actuator provides constant torque to the application with and without power applied to the actuator. The NMQ24-MFT US actuator is shipped in a Mid position, compression against seats or gaskets for tight shut-off is accomplished manually.

After mounting and completing electrical installation the NMQ24-MFT US must have the adaptation function initiated. This is accomplished by pressing the m