M9208-GGC-3 Johnson Controls Actuator

Overview

The Johnson Controls M9208-GGC-3 is a high-performance spring return electric actuator designed to provide precise proportional control for dampers in commercial HVAC systems. Operating on AC/DC 24 V power, this direct-mount, bidirectional actuator delivers 70 lb-in (8 N-m) of running and spring return torque. It features a brushless DC motor controlled by an integrated microprocessor that ensures a constant 150-second run time regardless of the load.

Features

• Proportional Control: Supports 0-10 VDC, 2-10 VDC, or 4-20 mA modulating control signals.
• Fail-Safe Operation: A robust mechanical spring return system ensures the damper returns to a safe position during power loss.
• Auxiliary Switches: Includes two integrated SPDT auxiliary switches for end-stop signaling.
• Electronic Stall Detection: Protects the gear train and increases reliability by eliminating the need for mechanical limit switches.
• Direct Mounting: Installs directly onto round or square damper shafts without requiring a damper linkage.

Specifications

• Power Supply: 24 VAC/VDC
• Torque: 70 lb-in (8 N-m)
• Control Input: 0(2)-10 VDC or 0(4)-20 mA
• Runtime: 150 seconds motor; 17-25 seconds spring return
• Enclosure Rating: NEMA 2 (IP54)
• Electrical Connection: 48-inch 18 AWG appliance cable with integral 3/8-inch FMC connectors
• Rotation Range: 95 degrees

Applications

The M9208-GGC-3 is engineered for the precise positioning of control dampers in heating, ventilating, and air conditioning systems. It is widely used in commercial air handling units and industrial ventilation applications requiring dependable proportional modulation and mechanical fail-safe safety features.