232直接转成全双工（4线制）485接口 只用一片MAX488即能转换成功，其实是422通信方式，已经测试通过。 带有配套电源电路-232 be transferred directly into a full-duplex (4 wire system) 485 with only a MAX488 that is able to convert successfully, in fact, is a 422 means of

用C51单片机实现MAX484通信的C语言程序-Communication with C51 MCU MAX484 C-language program

好东西，主要是讲解422通讯方式的模块。里面含有好几种的通讯模块介绍，自己下下去看吧-Good thing, the main means of communication is to explain the module 422. Which contains several of the communication module introduces himself go and see the next