Siemens SIMATIC PLC 6AG1688-3XY38-2AX0 SIPLUS HMI DESIGN BLANK FRONT   KP8 FORMAT -25 ... +60 DEGREE   WITH CONFORMAL COATING BASED ON   6AV3688-3XY38-3AX0 . DESIGN   BLANK FRONT KP8 FORMAT   APPEARANCE FOR EASY MOUNTING OF   STANDARD 22.5 MM ELEMENTS IDEAL   FOR MODULAR OPERATING PANELS   ALSO OPTIMIZED FOR MOUNTING IN   EXTENTION UNITS FOR PRO DEVICES 6AG16883XY382AX0