Description
Honeywell MS7503A2221 Direct Coupled Actuator Overview
The Honeywell MS7503A2221 is a Direct Coupled Actuator (DCA) engineered for precise and reliable damper control in commercial and residential HVAC applications. Operating on a 24V power supply, this actuator delivers 27 in-lb of torque and features a spring return (SR) mechanism that automatically returns the damper to its fail-safe position upon power loss — a critical safety and energy-efficiency feature. The integrated auxiliary switch provides additional control flexibility, enabling end-of-travel feedback or interlocking with other system components.
Key Features
- Operating Voltage: 24V AC/DC
- Torque Output: 27 in-lb
- Spring Return (SR) fail-safe operation — returns to default position on power loss
- Integrated Auxiliary Switch (Aux. Sw.) for end-of-travel signaling or system interlocking
- Direct Coupled design — mounts directly to damper shaft without crank arms or linkages
- Suitable for commercial and residential HVAC damper applications
- Compact, durable construction for long service life
Application
The MS7503A2221 is ideal for use with air handling units, VAV systems, and zone dampers where dependable spring return actuation and auxiliary switching capability are required. Its direct coupled mounting simplifies installation and reduces maintenance requirements.
Why Choose the Honeywell MS7503A2221?
Honeywell’s MS7503A2221 combines proven actuator technology with the added reliability of spring return fail-safe action and an auxiliary switch — making it a versatile solution for contractors and building automation professionals who demand consistent performance and easy integration into existing HVAC control systems.
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