Johnson Controls M9208-BAC-3 Actuator

The Johnson Controls M9208-BAC-3 is a robust Spring Return Direct Coupled Actuator engineered for reliable two-position control in demanding HVAC applications. Operating at 120Vac, this unit delivers a rated 70 lb-in torque, ensuring positive closure on dampers and valves during power loss. The M9208 series is a preferred choice for contractors requiring a 55-71 second power-on run time and precise mechanical fail-safe positioning. This model features an integrated 48" appliance cable with a 3/8" FMC connector, simplifying field installation and reducing labor time. With its NEMA 2 rated enclosure and dual SPDT auxiliary switches, the M9208-BAC-3 provides essential feedback for end-stop monitoring or external equipment sequencing. It is compatible with a variety of damper linkages and shaft sizes, making it a versatile replacement actuator for thermal and air handling systems.

• Fail-Safe Operation: Mechanical spring return ensures the system reverts to a safe position during power interruptions.
• Integrated Monitoring: Two built-in SPDT auxiliary switches allow for precise status verification and interlocking.
• Simplified Wiring: Equipped with a 48-inch appliance cable and 3/8-inch flexible metallic conduit connector for rapid deployment.
• High Torque Output: Delivers 70 lb-in (8 Nm) of torque, suitable for medium-sized air dampers and control valves.
• Contractor Grade Durability: Reversible mounting design facilitates easy installation on both clockwise and counter-clockwise opening shafts.

What is the typical application for the dual auxiliary switches?
The SPDT switches are typically used to signal the fully open or fully closed position to a BAS controller or to interlock a fan motor or heating element once the damper has reached its stroke limit.

Can this actuator be mounted on different shaft diameters?
Yes, the universal scale and direct-coupled design are compatible with most standard round and square shafts, typically ranging from 5/16" to 5/8" (8 to 16 mm).

Is the M9208-BAC-3 suitable for outdoor installation?
The unit features a NEMA 2 (IP54) rating, meaning it is protected against dripping water and debris. For extreme exposure, a weather shield is recommended to maintain optimal performance.

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.