This is the operation manual of SIMATIC ET 200S serial interface module.
This manual covers safety instructions for the ET 200S serial interface module, including the meaning of warning symbols and the requirement that only qualified personnel perform installation and maintenance. It also lists the permitted devices and components that may be used with the module.
The document details the hardware connections (RS‑232C, RS‑422/485 terminal assignments), the basic principles of serial data transmission, configuration of Modbus/USS communication, function block usage, startup characteristics, and extensive diagnostic information such as error codes and LED status messages. This manual is written in Chinese.
It indicates a safety warning that, if ignored, could cause death or serious personal injury.