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21ic
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什么是RS-485接口?RS-232-C接口相比有何特点? - 21ic电子网
RS-422与RS-485标准均规定VOS≤3V,但VGPD可能会有很大幅度 (十几伏甚至数十伏),并可能伴有强干扰信号,致使接收器共模输入VCM超出正常范围,并在传输线路上产生干扰电流,轻则影响正常通信,重则损坏通信接口电路。
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