Original Johnson Controls M9108-GDC-1N1 M9108 M9116 M9124 M9132 Switch Field

Product Specification

M9108 Series Proportional Electric Non-spring Return Actuators The M9108-GGx-2 and M9108-HGx-2 Series direct-mount electric actuators operate on 24 VAC or VDC power, and are available for use with proportional controllers. These bidirectional actuators do not require a damper linkage, and are easily installed on a damper with a round shaft up to 3/4 in. (19 mm) in diameter or a square shaft up to 5/8 in. (16 mm). They may be direct- or remote-mounted to a damper. A single M9108-GGx-2 or M9108-HGx-2 model delivers up to 70 lb∙in (8 N∙m) of torque. The angle of rotation is mechanically adjustable from 0 to 90° in 5-degree increments. Integral auxiliary switches are available to indicate end-stop position or to perform switching functions at any angle within the selected rotation range. Jumpers on the actuator allow users to select the direction of action, range of control input, and calibration (fixed or adjustable). Position feedback is available through switches, a potentiometer, or a 0 to 10 VDC signal. Figure 1: M9108 Series Actuator Features and Benefits  Two Control Inputs Meet the needs of most applications  Output Position Feedback Provides simple, closed-loop control with accurate position sensing  Electronic Stall Detection Ensures higher reliability by deactivating the actuator motor if a stall condition is detected  Dual Scale (0 to 90° and 90 to 0°) on the Cover Indicates the position of the actuator’s rotation in 10° increments  Removable Coupler Allows adjustment of the rotation range from 0 to 90°  Steel U-bolt Clamp Provides four-point damper shaft gripping  Jumper-selectable Rotation Direction and Manual Gear Release Simplifies installation, setup, and field adjustments  National Pipe Thread (NPT) Threaded Housing Provides easy connection for electrical fittings 2 M9108 Series Proportional Electric Non-spring Return Actuators Submittal Bulletin Application IMPORTANT: This device is not designed or intended to be used in or near environments where explosive vapors or gases could be present, or environments where substances corrosive to the device’s internal components could be present. The M9108 proportional actuators may be mounted in any convenient orientation. They are designed to position air dampers and valves in Heating, Ventilating, and Air Conditioning (HVAC) systems. Applications include: • positioning return air or exhaust dampers • controlling face and bypass dampers • positioning blades for variable volume fans Refer to the manufacturer’s information to properly size the damper, valve, and/or actuator. Spring return actuators, such as Johnson Controls® M9206 and M9216 Series, are recommended for use with outdoor air dampers in cold climates. Operation IMPORTANT: The M9108 Series proportional actuators are intended to control equipment under normal operating conditions. Where failure or malfunction of an M9108 proportional actuator could lead to an abnormal operating condition that could cause personal injury or damage to the equipment or other property, other devices (limit or safety controls), or systems (alarm or supervisory) intended to warn of, or protect against, failure or malfunction of the M9108 actuator must be incorporated into and maintained as part of the control system. M9108 proportional actuators operate on 24 VAC at 50/60 Hz or 24 VDC. These compact actuators use a DC motor with stall detection circuitry that operates throughout the entire stroke. The M9108 proportional actuators employ noise-filtering techniques on the control signal to eliminate repositioning due to line noise. Rotation is mechanically limited to 93° by integral end-stops. The position of the actuator is marked from 0 to 90° on the cover. An anti-rotation bracket prevents lateral movement of the actuator. Press the spring-loaded gear release on the actuator cover to disengage the gear train for manual repositioning of