HW MS4120A1001

Direct-Coupled Damper Actuators

S20 Series MS4120A Spring Return Direct-Coupled Damper Actuator - 175 lb-in

• Line voltage actuator control for use in HVAC systems
• It drives 1/4-turn, final control elements requiring spring return fail-safe operation
• Brushless DC submotor with electronic stall protection for floating/modulating models;
  brush DC submotor with electronic stall protection for 2-position models
• Self-centering shaft coupling for various shaft sizes
• For use with 2-position, SPST, line-voltage (Series 40) or low-voltage (Series 80) controls
• For use with floating or switched SPDT (Series 60) controls; use with proportional
  current or voltage (Series 70) controls
• For use with proportional current or voltage (Series 70) controls;
  available with adjustable zero and span
• Available with combined floating and modulating control in a single device
  and with line-voltage internal end switches
• Access cover facilitates connectivity
• Environmental rating: NEMA2
• UL Listed, CE compliant and plenum rated per UL873