Siemens simatic hmi basic panels 1st generation siemens 6av6647 0aa11 3ax0 the siemens 6av6647 0aa11 3ax0 is a simatic hmi basic panel can be used wherever compact machines and plants are controlled and monitored locally such as in production process and building automation the simatic ktp400 hmi basic panel is installation compatible with the existing touch devices of the product family of panels and multi panels it has a mono widescreen tft display size of 43 inches with a screen res