Introduction to RS485

RS485 is a serial communication Standard, whose full name is Recommended Standard 485 (Recommended Standard 485). It was formulated by the Electronic Industries Association (EIA) of the United States in 1983 and is often used in long-distance and multi-device serial communication scenarios.

It is an improved version of the RS422 standard, supporting half-duplex communication. It features strong anti-interference ability, long transmission distance, and multi-node connection, and is widely used in industrial automation, building control, security monitoring, intelligent instruments and other fields.