Honeywell MS4110A1200 Actuator

The Honeywell MS4110A1200 Actuator is a high-torque, spring return direct-coupled actuator engineered for reliable two-position damper control in commercial HVAC systems. Delivering 88 lb-in torque, this line-voltage unit (100-250 VAC) is designed for on-off damper actuator applications, including air handlers, ventilation flaps, and ball valves. It serves as a direct, high-performance replacement for legacy models, including the MA40-7041-501, MA41-7070-502, and MA41-7071-502.

Built for the rigors of the field, the MS4110A1200 features a self-centering shaft adapter that handles various shaft sizes and shapes, ensuring a secure grip and reducing installation time. This model includes two internal auxiliary switches (SPDT) for position signaling or interlocking equipment. With a fast 20-second fail-safe spring return and a 45-second nominal drive time, it ensures precise mechanical positioning during normal operation and immediate safety closure upon power loss. The rugged NEMA 2/IP54 aluminum housing and plenum-rated access cover permit installation in demanding environments across a wide temperature range.

• Universal Compatibility: Replaces MA40-7041-501, MA41-7070-502, and MA41-7071-502 with no additional mounting hardware required.
• Integrated Dual Aux Switches: Factory-installed SPDT switches eliminate the need for external add-ons to confirm damper position.
• Field-Selectable Rotation: Easily switchable spring return direction to accommodate clockwise or counter-clockwise fail-safe requirements.
• High Torque Performance: 88 lb-in (10 Nm) rating provides more than enough force for medium to large dampers.
• Manual Override: Includes a dedicated manual crank for easy testing and commissioning during power-down states.

What is the maximum shaft size supported?
The self-centering adapter fits round shafts from 3/8 to 1.06 inches and square shafts from 3/8 to 11/16 inches.

Can this be mounted in any orientation?
Yes, the actuator is designed for flexible mounting, but for NEMA 2 protection, it should be installed with the conduit in the down position.

Is this actuator suitable for smoke control?
No, the MS4110A1200 is for standard HVAC air management and does not carry a UL555S fire/smoke rating.

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.