Honeywell MS4110A1002 Actuator

The Honeywell MS4110A1002 Actuator is a heavy-duty, spring return direct coupled actuator engineered for reliable two-position (on/off) damper control in commercial HVAC systems. This line voltage actuator operates on a universal 100-250Vac power supply, delivering 88 lb-in of torque to drive quarter-turn final control elements. Designed for fail-safe operation, it features a 45-second nominal driving time and a rapid 20-second maximum spring return upon power loss. The MS4110A1002 serves as a direct replacement for MA41-7070 and MA40-7070 models, offering a self-centering shaft adapter that accommodates 3/8" to 1.06" round or 3/8" to 11/16" square damper shafts. With a durable NEMA 2 rated enclosure and a wide operating temperature range of -40°F to 140°F, this unit is built for demanding mechanical environments. It utilizes a single pole single throw (SPST) control signal and includes a manual crank for override during commissioning or emergency outages.

• Broad Compatibility: Standardized self-centering clamping adapter reduces installation time by fitting a wide variety of shaft sizes without extra hardware.
• Robust Construction: Metal housing with built-in mechanical end limits ensures long-term durability in high-cycle HVAC damper control applications.
• Universal Voltage: Flexible 100-250Vac input allows for standardized stocking across different regional power requirements.
• Fail-Safe Security: Reliable mechanical spring return ensures dampers reach a safe position immediately during power interruptions.
• Simplified Wiring: Features an enclosed screw terminal strip for secure electrical connections and easy serviceability.

What is the maximum stall torque for the MS4110A1002?
While the rated driving torque is 88 lb-in, these units typically feature a higher stall torque (often up to 150 lb-in) to handle unexpected blockages, though driving should be limited to the rated load.

Can this actuator be mounted in any orientation?
Yes, the direct coupled mounting allows for flexible orientation. The spring return direction is field-selectable by simply flipping the actuator on the shaft to match the required fail-safe rotation.

Is the manual crank included for field adjustments?
Yes, high-torque models like the Honeywell MS4110A1002 include a manual winding crank to allow technicians to position the damper manually during setup or power-down scenarios.

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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.