这是我为国家级大学生创新型实验项目绘制的RS485部分的PCB图，该板上接PC机，下接各个RS485分结点。学习485通信的朋友可以参考。是基于protel画的。-This is my innovative college students for the national pilot project part of the PCB RS485 drawn map, the board then PC, then under each sub-node RS485. Study 485, you

基于PC串口232和485之间的通信转换，protel的PCB图附带原理图-232 to 484 that uart of computer