Schneider Electric (Barber Colman) M400A-VB Actuator

The Schneider Electric (Barber Colman) M400A-VB is a non-spring return Forta globe valve actuator engineered for precise linear control in demanding HVACR applications. Operating on 24V AC/DC power, this versatile unit supports both floating and proportional control signals, including 0-10Vdc, 2-10Vdc, and 4-20mA (utilizing the included 500 Ohm resistor). With a robust 90 lbf (400 N) force output, it is specifically designed for direct mounting to VB-7000 series valves via a secure screw-mount connection, eliminating the need for separate linkage kits. The integrated 2-10Vdc feedback signal allows for real-time position monitoring within building automation systems. Technicians can easily field-configure the direct/reverse action and stroke calibration through onboard DIP switches. Featuring a die-cast housing and a NEMA 2 rated cover, this proportional valve actuator ensures reliable performance in chilled water, hot water, and steam systems. The manual override handle provides immediate mechanical positioning during commissioning or emergency service, while electronic torque overload protection prevents motor damage throughout the full stroke.

• Streamlined Installation: The screw-mount design allows for immediate attachment to VB-7000 globe valves without additional adapters.
• Universal Compatibility: Field-selectable 0-10Vdc and 4-20mA input signals ensure seamless integration with most 24V controllers.
• Precise Monitoring: Built-in 2-10Vdc position feedback provides accurate data for system diagnostics and loop tuning.
• System Protection: Internal torque sensing protects the internal gear train and valve stem from mechanical stress at the end of travel.
• Technician-Friendly Calibration: Simple "one-touch" stroke initialization automatically synchronizes the actuator with the valve’s mechanical limits.

• Is a linkage kit required for the M400A-VB? No, the "VB" designation indicates a screw-mount style that connects directly to the bonnet nut of Schneider Electric VB-7xxx valves.
• Does this actuator return to a safe position during power loss? This is a non-spring return (NSR) actuator. It will maintain its last position upon a loss of power.
• Can I use this for 4-20mA control signals? Yes, the actuator is compatible with 4-20mA signals when using the 500 Ohm resistor included with the unit.

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.