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Submittal Bulletin

Issue Date October 2017

Code No. LIT-1201427 www.johnsoncontrols.com

M9108-AGx-2 Series On/Off and Floating Electric

Non-spring Return Actuators

The M9108-AGx-2 Series direct-mount electric

actuators operate on 24 VAC or VDC power, and are

available for use with on/off and floating 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). Actuators may be

direct- or remote-mounted to a damper.

A single M9108-AGx-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. Position feedback is available through either a

135 or 1,000 ohm potentiometer.

Figure 1: M9108-AGx-2 Series

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

 Coupled to a Ball-style

Valve with Linkage

Regulates the flow of hot or chilled water,

50% glycol solution, and low pressure steam

 Manual Gear Release Simplifies installation, setup, and field adjustments

 National Pipe Thread (NPT)

Threaded Housing

Provides easy connection for electrical fittings

Summary of content (4 pages)

PAGE 1
Submittal Bulletin Issue Date October 2017 M9108-AGx-2 Series On/Off and Floating Electric Non-spring Return Actuators The M9108-AGx-2 Series direct-mount electric actuators operate on 24 VAC or VDC power, and are available for use with on/off and floating 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).
PAGE 2
Application Operation 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. IMPORTANT: The M9108-AGx-2 Series actuators are intended to control equipment under normal operating conditions.
PAGE 3
Ordering Information Table 1: Actuator Models and Accessories Product Code Number Description M9108-AGA-2 70 lb∙in (8 N∙m) electric non-spring return actuator for on/off or floating control with 24 VAC/VDC input M9108-AGC-2 70 lb∙in (8 N∙m) electric non-spring return actuator for on/off or floating control with 24 VAC/VDC input and two SPDT 24 VAC auxiliary switches M9108-AGD-2 70 lb∙in (8 N∙m) electric non-spring return actuator for on/off or floating control with 24 VAC/VDC input and a 135 ohm feed
PAGE 4
Technical Specifications Product M9108-AGx-2 Series On/Off and Floating Electric Non-spring Return Actuators Power Requirements 20 to 30 VAC at 50/60 Hz or 24 VDC ±10%; 6.