Somfy Altus LT50 506S2 RTS AC Roller Shade Motor #1032500 Somfy LT50 Altus RTS 506S2 (110V AC) Star Head Motor 1032500, torque 6 Nm (52 inch/ LBS). Speed-38 rpm, crown and drive separately. Replaces Somfy 522E Motor torque 52 inch LBS. Speed-38 rpm, crown and drive separately.