ms4dSchneider Electric MS4D-8033-100 : Spring Return Damper Actuator (CW Spring), 30 in-lb Torque, 24 VACDC, 2MasterSCADA 4D by InSAT. Versions: 1.3, 1.3, 1.2, 1.2 and 1.1. File name: ms4d.exe