Field fit – ET 200X mounting rail, 400 mm
The 6ES7194-1GA00-0XA0: This is the 400 mm slim mounting rail for the SIMATIC ET 200X distributed I/O system. It's a spare part meaning it replaces the original rail in an existing installation. The rail holds up to 1 bus module (BM) and 3 expansion modules (EM) – that's the panel layout you're working with.