Johnson Controls M9108-AGD-2 Actuator

The Johnson Controls M9108-AGD-2 is a robust non-spring return direct coupled actuator engineered for precise control of dampers and valves in commercial HVAC systems. Operating on 24VAC or 24VDC power, this unit provides 70 lb-in torque (8 Nm), making it an ideal replacement for medium-sized air handling units and zone control applications. It features floating or ON/OFF control logic and includes an integrated 135 ohm potentiometer for feedback or position sensing. With a fast 25 to 50 second travel time for 90 degrees of rotation, it ensures responsive air volume adjustments. The screw terminal connections simplify field wiring, while the compact footprint allows for easy installation on 3/8" to 1/2" round shafts or 3/8" square shafts. Designed for long-term reliability without the complexity of spring return mechanisms, this Johnson Controls actuator is a staple for technicians maintaining building automation systems.

• High Torque Output: Delivers 70 lb-in of force to reliably drive dampers without binding.
• Versatile Powering: Compatible with both AC and DC 24V circuits for flexible integration into existing control loops.
• Integrated Feedback: The 135 ohm potentiometer allows for precise monitoring of the actuator position.
• Fast Response: Short stroke timing allows for tighter control of temperature and static pressure setpoints.
• Manual Override: Features a simplified manual gear release for easier commissioning and emergency positioning.

Is the M9108-AGD-2 compatible with 3-point floating controllers?
Yes, this model is specifically designed for floating control signals where the controller provides an increase or decrease signal to position the drive.

Can this actuator be used in failsafe applications?
No, this is a non-spring return model. It will remain in its last position upon loss of power unless manually moved.

What is the maximum shaft diameter this unit can mount to?
The universal mounting bracket accommodates round shafts up to 1/2 inch and square shafts up to 3/8 inch.

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.