M9203-BUA-2 Johnson Controls Actuator

Overview

The Johnson Controls M9203-BUA-2 is an electric spring-return direct-coupled actuator engineered for reliable two-position control of dampers and valves in commercial and light industrial HVAC systems. It features an on/off control operation and a mechanical spring-return system that automatically returns the damper to its fail-safe position upon loss of power.

Features

• Direct-coupled mounting eliminates the need for damper linkages or separate brackets
• Reversible mounting design allows for easy selection of spring-return direction
• Electronic stall detection provides overload protection across the entire rotation range
• Double-insulated construction eliminates the requirement for an electrical ground connection
• Self-centering shaft clamp fits round or square shafts for simple installation
• Includes a 48-inch appliance cable and an anti-rotation bracket

Specifications

• Supply Voltage: 85 to 264 VAC, 50/60 Hz
• Torque Output: 27 lb-in (3 N·m) rated running and spring-return torque
• Control Type: Two-Position (On/Off)
• Power-On Run Time: Less than 75 seconds for 90-degree rotation
• Spring-Return Time: 12 to 22 seconds depending on temperature and load
• Rotation Range: Adjustable from 35 to 95 degrees
• Power Consumption: 0.06 A running, 0.02 A holding position

Applications

The actuator is primarily used to control dampers and quarter-turn valves in standard commercial HVAC applications, air handling units, and building automation systems where reliable fail-safe operation is required under normal operating conditions.