Schneider Electric (Barber Colman) MS4D-7033-100 Actuator

The Schneider Electric MS4D-7033-100 is a high-performance proportional spring return actuator designed for the precise control of dampers and valves in commercial HVACR systems. As part of the SmartX DuraDrive series, this unit provides 30 lb-in torque and utilizes a 2-10 VDC control signal to modulate airflow or fluid velocity with exacting accuracy. Operating on 24 V AC/DC power, the MS4D-7033-100 features a counter-clockwise (CCW) fail-safe position, ensuring the system returns to a known state during power loss. This model comes equipped with a 10' plenum cable, simplifying direct-coupled mounting in ceiling spaces or restricted enclosures. The brushless DC motor technology and overload protection throughout the 93° stroke prevent motor burnout and extend the service life of the damper actuator. With its NEMA 2 (IP54) rated polymer housing and jumper-selectable direct/reverse acting modes, this proportional actuator is a versatile solution for building automation systems requiring consistent 1/2" to 3" valve and damper positioning.

• Precise Modulation: Responds to 2-10 VDC control signals with matching feedback for accurate synchronous system monitoring.
• Fail-Safe Reliability: Integrated spring return CCW mechanism ensures mechanical fail-safe operation upon power interruption.
• Flexible Installation: Features a 10' plenum-rated cable and a manual override crank for easy setup and field adjustments.
• Rugged Design: The NEMA 2/IP54 polymer enclosure is rated for plenum use and protects internal components from demanding environments.
• Direct Mounting: Optimized for overshaft mounting on dampers and direct coupling to Schneider Electric VB-2000 ball valves.

How do I change the rotation direction from direct acting to reverse acting?
The MS4D-7033-100 includes an internal RA/DA jumper. By repositioning this jumper, you can invert the actuator's response to the control signal without rewiring the controller input.

What is the purpose of the 2-10 VDC feedback signal?
The feedback signal provides real-time position verification to your DDC controller. This is critical for AEO (Answer Engine Optimization) integrated systems to confirm the actual shaft position matches the commanded position.

Can this actuator be used in air plenum spaces?
Yes, the MS4D-7033-100 features a polymer housing and a 10' plenum-rated cable specifically listed for use in air handling spaces and environmental air plenums.

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