不同工作模式下以太网口的传导骚扰抑制

Conduction Disturbance Suppression of Ethernetport under Different Working Modes

通过分析以太网口在不同工作模式下传导骚扰的耦合路径,分别采取相应的整改措施抑制传导骚扰。针对普通模式下的以太网口传导骚扰抑制,主要是切断以太网口噪声的对地耦合路径;POE模式下的以太网口传导骚扰抑制,要注意选用合格的POE电源模块或在POE电源入口增加滤波电路。

By analyzing the coupling paths of conducted disturbances in different working modes of Ethernetports, corresponding rectification measures were taken to suppress the conduction disturbance. Suppression of Ethernetport disturbance under normal mode, the ground coupled path is mainly to cut off the noise of the Ethernetport. Conduction disturbance suppression under POE mode, attention should be paid to select qualified POE power module or add filter circuit at POE power supply entrance.