Johnson Controls M9108-AGA-2 Actuator

The Johnson Controls M9108-AGA-2 is a professional-grade non-spring return direct coupled actuator designed for the precise positioning of air dampers and valves in commercial HVACR systems. Engineering to deliver 70 lb-in torque, this 24V unit supports both floating control and two-position (on/off) signals, making it a versatile choice for building automation sequences. The brushless DC motor is equipped with integrated electronic stall detection, which protects the gear train by deactivating the motor if an obstruction is encountered, ensuring long-term reliability in the field. With a travel time of 25 to 50 seconds for 90 degrees of rotation, it provides stable modulation without the risk of hunting. This model features screw terminals for secure electrical termination and a manual gear release button that allows for easy manual override and rapid commissioning. Designed for direct mounting on round shafts up to 3/4 inch or square shafts up to 5/8 inch, it eliminates the need for complex damper linkages, simplifying your installation workflow.

• Dual-Signal Compatibility: Supports 24Vac and 24Vdc floating or two-position control for seamless integration into various BAS architectures.
• Direct-Coupled Installation: Mounts directly to damper or valve shafts, reducing labor costs and eliminating the mechanical failures associated with linkages.
• Stall Protection: Electronic stall detection eliminates the need for end-limit switches and protects the internal components from damage during over-torque conditions.
• Adjustable Rotation: The stroke is mechanically adjustable from 0 to 90 degrees in 5-degree increments to match specific damper bank requirements.
• Reliable Maintenance: Features a manual override button for testing and setup during power-loss or commissioning phases.

What is the typical application for the M9108-AGA-2?
This actuator is commonly used for controlling air dampers, ball valves, and zone systems where non-spring return operation is required and 70 lb-in of torque is sufficient for the load.

Can I use this actuator with 24VDC systems?
Yes, the M9108-AGA-2 is designed to operate on either 24VAC at 50/60 Hz or 24VDC (±10%), providing flexibility for various control power sources.

How do I change the rotation direction?
Direction is determined by the screw terminal wiring. Connecting to specific terminals dictates clockwise or counter-clockwise rotation, allowing you to match the actuator to the damper’s physical orientation.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.