232同485转换的pcb图，有需要的只要稍加修改一下就可以了

RS485转RS232电路原理图及PCB图-RS232 RS485 switch PCB circuit diagram and map

232 TO 485 原理图 PCB 232 TO 485 原理图 PCB-232 TO 485 SCH PCB 232 TO 485 SCH PCB

232转485接口电路，包括原理图，PCB板，已实际测试通过，请放心参考并使用，自动识别485或422接口通讯。-232 to 485 circuits, including schematics, PCB board, had actually been tested, please rest assured that the reference and use, automatic identification of 485 or 422 interface communication.