ET 200 is the name for Siemens’ distributed I/O family. The different letters stand for very different products, so it helps to know what you have before you order a replacement.
- ET 200SP is the current compact, modular IP20 system with a wide range of I/O and technology modules.
- ET 200S is an earlier modular IP20 system built around power and electronic modules on terminal modules.
- ET 200M uses S7-300 signal modules behind an interface module, which makes it popular in process plants.
- ET 200pro is designed for installation in the field without a cabinet, with a higher protection class.
Interface modules and bus type
Each system connects through an interface module such as PROFIBUS DP or PROFINET. Replacing an interface module with a different bus type means changing the network configuration, so always match it.
What to check on replacement
- The exact order number of each module
- The terminal or base unit that carries it
- The GSD or GSDML file in the engineering project
Find parts in our ET 200 range or contact us with a photo of your station.