Description
The Schneider Electric (Barber Colman) MS4D-8033-100 is a proportional, spring-return direct-coupled damper actuator engineered for precise airflow control in commercial HVAC and building automation systems. Operating on a 24V power supply with a 2–10 Vdc proportional control signal, this actuator delivers accurate, modulating damper positioning to support energy-efficient ventilation, economizer, and VAV applications.
The spring-return (SR) design ensures the actuator returns to its fail-safe position — clockwise (CW) rotation — upon loss of power or control signal, providing reliable system protection and code-compliant fail-safe operation. Its direct-coupled mounting eliminates the need for crank arms or linkages, simplifying installation and reducing maintenance requirements.
Key Features
- Proportional control via 2–10 Vdc input signal for precise damper modulation
- Spring-return (SR) fail-safe operation — returns to clockwise (CW) position on power loss
- 24V AC/DC power supply compatibility
- Direct-coupled design for fast, linkage-free installation
- Suitable for commercial HVAC, building automation, VAV, and economizer applications
- Manufactured by Schneider Electric, successor to the trusted Barber Colman controls line
Specifications
- Brand: Schneider Electric (Barber Colman)
- Model / SKU: MS4D-8033-100
- Series: PropAct SR (Proportional Actuator, Spring Return)
- Supply Voltage: 24V
- Control Signal: 2–10 Vdc (proportional)
- Fail-Safe Direction: Clockwise (CW)
- Mounting: Direct-coupled
Applications
- Variable Air Volume (VAV) systems
- Economizer damper control
- Commercial HVAC air handling units
- Building automation and energy management systems
- Ventilation and outdoor air control dampers
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