Description
N:N网络RS485连线的选择是一对导线,单对子布线的情况下,在端子RDA和RDB之间连接端子电阻(110欧,1/2瓦棕棕棕),双对子布线的情况下,在端子SDA和SDB之间连接端子电阻,(220欧姆,1/4瓦),而在RDA和RDB之间也是这样。(橙橙棕),优点:1节省配线,2提高处理速度,3实时性。四N:N网络设计
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