Siemens simatic hmi touchscreen displays led backlighting siemens 6av2123 2db03 0ax0 a basic tft widescreen display with led backlighting and touchscreen operation the display is intended for use in plant and machinery systems where its design and performance meet all the requirements for high quality visualisation even in small systems siemens 6av2123 2db03 0ax0 simatic hmi ktp400 basic