IC693MCM001

IC693MCM001 

正确、良好的接地可以将混入电源和I/O电路的干扰信号引入大地，消除或减小干扰的影响，是安全保护和*噪声的重要手段，对****I-8000系统的稳定性、可靠性****其重要。为了尽可能减小电磁噪声影响，电源回路和控制回路要分别设立接地****。在控制系统中难免有变频器之类的功率器件，注意要将变频器散热器、电源中性线、变频器外壳和中性端、电机外壳和Y型接法中性端要可靠接于电源回路接地****上，所有接地线不可形成接地回路。变频器接地电阻越小越好，接地导线截面积应不小于4mm2，长度应控制在20m以内。屏蔽层、数字信号地接于控制回路接地****。为****形成回路，屏蔽层应单端接地。控制器的接地线与电源线、动力线分开。I-8000单独接地，也可以与其他设备公共接地，但严禁与其他设备串联接地。

3、实际应用案例

在小型石油公司中，要进行大量的油料计量工作如轻油、0＃汽油、90＃汽油等，其计量过程往往是车队从货运站拖回公司后经公司磅房过磅称毛重、卸料、车辆出厂时，再过磅称车重等等，过磅过程、手续、登记****其繁琐，有时还容易出现错磅和漏磅现象，****不容易管理，并且给统计、计量工作带来了****大的困难，过磅工人的劳动强度大，经常出现车队排队过磅的现象，办事效率****其低下，为改变这种局势，采用PC-BasedPLCI-8411嵌入式控制，并配以模拟信号输入模块I-8017H、模拟信号输出模块I-8024、光隔离数字输入/输出模块I-8042、I-8060继电器输出模块以及RS232/RS485转换器I-7520，并利用计算机控制技术，为其不同的油料的进站计量、出站计量、统计等开发了一套分布式的油料计量、统计管理系统，省时又省力，深得用户喜爱。

IC693MCM001  

IC693MCM001  

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IC693MCM001