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RS-485 - Wikipedia RS-485, also known as TIA-485 (-A) or EIA-485, is a standard, originally introduced in 1983, defining the electrical characteristics of drivers and receivers for use in serial communications systems
RS485通信----基本原理+电路图 - 知乎 RS485 是美国电子工业协会（Electronic Industries Association，EIA）于1983年发布的串行通信接口标准，经通讯工业协会（TIA）修订后命名为 TIA EIA-485-A。