This rear panel is compatible with Harmony STU human machine interfaces (HMIs).It is made of PC/PBT and available in dark gray. Its dimensions are 118mm (width) x 40.1mm (depth).It is suitable for simple machines and infrastructure applications.This panel is compatible with HMISTU655, HMISTU655W, HMISTU855 and HMISTU855W.Harmony STO (fromerly known as Magelis STO) is powered by the EcoStruxure operator terminal expert and STU (fromerly known as Magelis STU) is powered by Vijeo Designer.