rs485 is not an i fieldbus standard.

RS485 is a physical interface.

Fieldbus is a communication protocol, one is hardware and the other is software.

It is equivalent to the BIOS operating system pre-installed in a BIOS chip.

There are many types of operating systems, but they are all placed on the BIOS chip.

Fieldbus refers to a network based on digital communication between measurement and control machines in a factory, also called a field network.

That is to say, it is a network that specializes the communication between sensors, various operating terminals and controllers, and the communication between controllers.

The main wiring between these machines is ON/OFF, contact signals and analog signals. Through the digitization of communication, time division, multiplexing and multi-points are possible, thereby achieving high performance, high reliability, simplified maintenance,

Save wiring (the best enjoyment of wiring).