The SIPLUS HMI KP8 Design Empty Front (6AG1688-3XY38-2AX0) is an empty front panel from Siemens’ SIMATIC HMI series, a SIPLUS variant based on 6AV3688-3XY38-3AX0, designed with conformal coating for operation in a -40…+60 °C temperature range (startup at -25 °C). Built in the KP8 format, it facilitates easy mounting of standard 22.5 mm operator controls (e.g., buttons, switches, or indicators) and is ideal for setting up modular control panels. It is also compatible with the Extension Units of all 15" and 19" 4:3 PRO devices. With a net weight of 0.306 kg and packaging dimensions of 10.90 x 18.00 x 6.60 cm, this panel is used in industrial automation projects, such as creating customized control panels or expanding existing systems in harsh environments.