Johnson Controls M9124-HGA-2 Actuator

The Johnson Controls M9124-HGA-2 Actuator is a heavy-duty, non-spring return actuator designed for high-precision positioning of air dampers and valves in commercial HVACR systems. Delivering a robust 210 lb-in torque, this 24V direct-mount actuator provides reliable proportional control via a 0-10 VDC or 0-20 mA input signal. Unlike standard models, the -HGA variant features integrated zero and span adjustment, allowing for precise sequential operation of multiple dampers from a single controller. This modulating damper motor includes electronic stall detection to protect the gear train from over-torque conditions, extending the operational life of the unit without the need for external end switches. It is compatible with round shafts up to 3/4 inch and square shafts up to 5/8 inch, ensuring a legacy-fit replacement for older M9100 series units or integration into modern building automation systems.

• Enhanced Precision: Integrated zero and span potentiometers allow for fine-tuned calibration of the 0-10V control signal range.
• High Torque Reliability: Delivers a consistent 210 lb-in (24 Nm) of torque, suitable for large modulating HVAC dampers and ball valves.
• Universal Compatibility: Direct-mount design attaches easily to both round and square shafts, eliminating the need for complex damper linkages.
• Smart Protection: Internal stall detection circuitry monitors motor load to prevent damage during obstructions or end-stop contact.
• Tandem Capable: Supports master/slave configuration to double the effective torque in heavy-load applications.

What control signals are compatible with the M9124-HGA-2?
This unit supports proportional control via 0-10 VDC, 0-20 VDC, or 0-20 mA input. The position feedback signal provides a standard 0-10 VDC output to the controller.

Can the rotation speed or direction be adjusted?
Yes, the direction of rotation is jumper-selectable (CW/CCW). The timing for 90 degrees of rotation is approximately 175 seconds at 60 Hz.

Does this actuator require an anti-rotation bracket?
Yes, each unit includes an anti-rotation bracket to secure the actuator body while the coupler rotates the shaft.

This item is not eligible for free shipping.

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.