SZX is a side operator for sectional doors. The hollow drive shaft, to suit the spring shaft, allows a direct drive installation without using any chain transmission system. To meet any installation requirement, SZX can be placed either vertically or horizontally by using the 4 fixing holes on both sides. The H version features a simplier limit switch board with only two cams. Thanks to this feature it can connected directly to the power supply without using any control panel.