Johnson Controls M9104-GGA-2S Actuator

The Johnson Controls M9104-GGA-2S is a high-performance non-spring return actuator designed specifically for proportional control in VAV and VVT zone applications. This 24Vac damper actuator delivers a consistent 35 lb-in torque, making it a reliable solution for small to medium-sized dampers where precise air volume modulation is required. With a 60-second travel time at 60 Hz and a synchronous motor drive, it ensures stable positioning without the hunting often seen in lower-grade components. The unit is factory-calibrated for direct acting (DA) mode but features accessible jumper settings to switch to reverse acting (RA) or adjust the 0-10Vdc or 4-20mA control signal. This versatility allows contractors to integrate it into complex HVAC control systems. The integrated 48-inch plenum-rated cable simplifies field wiring while meeting UL 444 standards for installation in air handling spaces. Designed for 100,000 full stroke cycles, this actuator supports direct-mount installation on round shafts up to 1/2 inch or 3/8 inch square shafts.

Key Benefits:

• Universal Compatibility: Supports DC 0(2) to 10 V or 0(4) to 20 mA analog inputs with an included 500-ohm resistor for current signals.
• Efficient Installation: Integrated 48" CMP plenum cable eliminates the need for external conduit in most VAV box applications.
• Reliable Operation: Synchronous motor providing constant travel speed regardless of load, paired with electronic stall detection to prevent motor burnout.
• Simple Setup: Manual gear release lever allows for quick manual positioning and stroke adjustment without power.
• Field Flexibility: Includes jumper-selectable Direct/Reverse acting modes and feedback output for position tracking.

Common Questions:

How do I wire the M9104-GGA-2S for 4-20mA control?
The actuator accepts a 4-20mA signal by utilizing the provided 500-ohm external resistor. Ensure the internal jumper (W3) is set to the mA position to correctly interpret the current loop signal.

What damper shaft sizes are compatible?
This direct-coupled actuator fits round shafts ranging from 3/8 in. to 1/2 in. (10 to 13 mm) and square shafts of 3/8 in. (10 mm), provided the shaft length is at least 1.7 inches.

Can I change the rotation direction in the field?
Yes. While factory-set for direct acting (DA), you can remove the cover and adjust the internal jumpers to switch to reverse acting (RA) depending on your damper's "close" 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.