Siemens 6ES7194-1GB00-0XA0 ET 200X Mounting Rail, 520 mm

The 6ES7194-1GB00-0XA0: The 520 mm width is the 'wide version' of the standard rail, offering extra room for the base module, expansion module, and up to two pneumatic interfaces (spare part designation covers +2ms/FU/pneumatic interfaces). For an integrator building or repairing an ET 200X station, this rail defines the slot allocation and backplane alignment — if the existing rail is damaged or the station needs a wider envelope, this order code is the direct fit.