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什么是RS-485接口?它比RS-232-C接口相比有何特点?
[导读]RS-485接口是美国电子工业协会(EIA ... 实际上还有一根信号地线,共5根线。图1是其DB9连接器引脚定义。由于接收器采用高输入阻抗和发送驱动器比RS232更强的驱动能力,故允许在相同传输线上连接多个接收节点,最多可接10个节点。即一个主设备(Master ...
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