Somfy Sonesse 40 WT 406 A2 6/24 Motor Somfy Sonesse LS40 406S2 110 volt 4 Wire Round Head Motor. LS40 requires a 40mm Round Aluminum Tube (36 mm ID), motor plate adapter, crown an drive are sold separately. Torque 52 in. lb ,motor speed 24 rpm, unit weight 2.5 lbs. LS40 is a wired motor for all screen and roller blinds or large-size wood or aluminum Venetian blinds. Somfy Pert Number: 1001556 In new constructions and where few products require controls, Wired Technology links the control device to the motor using electrical wires that are embedded into the wall. When choosing Wired control units, electrical feeds must be well-thought-out prior to construction and future renovations need to be foreseen. Manual controls must be located near windows and in strategic areas, as we know that otherwise, shading devices and roller shutters are used less often.