Fully modular connections simply, quickly and securely link sensors and actuators in the field to a SIMATIC S7 or distributed IO devices. The connection consists of front connector modules for the S7-1500 and S7-300, the ET 200MP and ET 200M, attachable connecting cables and terminal modules to replace conventional terminal blocks, and also permit voltage and performance adaptation.
https://www.siemens.com/simatic-tc