What is the optimal installation location for the concentrator magnetic ring?

Adding a ferrite core to the concentrator cable is an effective method for suppressing common-mode radiation, and its effectiveness is highly dependent on the installation location. The optimal location follows the principle of "close to the interference source or sensitive entry point." For power lines, the ferrite core should be installed inside the power inlet of the chassis, as close as possible to the wall penetration terminal, to suppress internal noise radiation outward and block external interference. For communication lines (such as RS485), the ferrite core should be installed behind the port connector, ensuring that the signal line and return line (ground line) pass through the center of the ferrite core in the same direction simultaneously, forming a common-mode choke. If the cable already has a shielding layer, the ferrite core should be installed outside the grounding point of the shielding layer. For multi-core cables, all cores can be wound together on the ferrite core 2-3 times to increase inductance, but it should be noted that the distributed capacitance introduced by the winding may affect high-frequency performance. Typical selections include the PBZ1608E600Z0T (surface mount) or CMZ1211-501T (internal mount). With proper installation, insertion loss of 10-15dB can be obtained in the 30-100MHz frequency band.