RS485 communication system of isolation type and driving method thereof

摘要

The present invention relates to an isolated RS485 communication system and a driving method thereof, RS485 communication RS485 communication module connecting the communication isolation transformer for insulating the signal, and modulating the data to be directly powered by the isolation transformer and the communication can be implemented more easily isolated RS485 communication, hardware design for implementing the isolated RS485 communication cost and maintenance cost its purpose is to allow the can be reduced. In the ; To this end the present invention is a microcomputer for controlling the transmission and reception of communication with RS485, RS485 communication system including a communication module for transmitting and receiving data in RS485 communication system, is connected to the RS485 communication module for communication isolation transformer to isolate the signals between RS485 communication module and RS485 communication line; And connected between the microprocessor and the RS485 communication module modulates the data inputted from the microcomputer, and to include a data modulation device for transmission to restore the data that is input from the RS485 communication module.