Johnson Controls M9203-BUB-2 Actuator

The Johnson Controls M9203-BUB-2 is a professional-grade Spring Return Direct Coupled Actuator engineered for precision control in HVAC systems. Operating on a universal power supply of 85-264 VAC, this unit delivers a rated 27 lb-in torque (3 Nm), making it an ideal solution for small-to-medium dampers and ball valve applications. Designed for two-position control (on/off), it features a mechanical spring return that ensures a fail-safe position during power loss. With a power-on drive time of less than 75 seconds and a spring return time under 25 seconds, it provides reliable cycle performance. This model includes a pre-installed 1 SPDT auxiliary switch for position feedback and a 48-inch appliance cable with 1/2-inch conduit connectors for streamlined field wiring. Its compact housing allows for installation in tight mechanical spaces while maintaining high ingress protection standards.

Key Technical Benefits

• Universal Voltage Compatibility: The wide 85-264 VAC input range eliminates the need for external transformers, simplifying line voltage actuator upgrades.
• Fail-Safe Reliability: Integrated mechanical spring return ensures dampers or valves return to a known safe state during power interruptions.
• Integrated Feedback: Equipped with one SPDT auxiliary switch, allowing for precise end-switch signaling or equipment interlocking without additional hardware.
• Fast Installation: The direct-coupled design with a universal mounting bracket and pre-wired 48-inch cable reduces labor time on the job site.
• Quiet Operation: Designed for low-noise mechanical performance, suitable for commercial environments where actuator motor noise must be minimized.

Common Questions

What is the maximum damper area for the M9203-BUB-2?
Based on the 27 lb-in torque rating, this actuator typically handles dampers up to 6.75 square feet, depending on the manufacturer’s seal friction and air velocity.

Can this actuator be used for multi-position control?
No, the M9203-BUB-2 operation is strictly two-position (on/off). For modulating control, a 0-10 VDC or 4-20 mA model would be required.

Does the spring return direction change?
Yes, the spring return direction is determined by how the actuator is mounted on the shaft. Flipping the unit determines a fail-open or fail-closed configuration.

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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.