pidAAARS232+RS485接口原理图
RS232 RS485接口原理图RS232 RS485接口原理图R2 一般取5.1KRS232串口电路图本图为R232转RS485的通讯电路转换图自制无源RS232-485转换器一、RS-232、RS
pidAAARS232+RS485接口原理图