How can the grounding of industrial servo cabinets meet EMC requirements?

As a system as a whole, the grounding of the servo cabinet must meet multiple requirements for safety, EMI suppression, and immunity. The EMC grounding specifications of Yinte Electronics stipulate that the cabinet must be connected to the building grounding post via an independent and reliable grounding wire (yellow-green, cross-sectional area ≥ equipment power line), with a grounding resistance <4Ω (IEC 60364 requirement). The cabinet interior is equipped with a main grounding copper busbar (cross-section >25mm²), and the PE terminals, shielding terminals, and metal casings of all components (drivers, filters, PLCs) are connected to this copper busbar via the shortest path. An EMI shielding gasket (such as conductive rubber) is used between the cabinet door and the cabinet body, and a low-impedance connection is achieved through comb-shaped springs, with a connection impedance <5mΩ. The ventilation openings use honeycomb waveguide plates, with their grounding frames welded to the cabinet body. At the cable entry point, the shielding layer is connected to the cabinet wall via 360-degree clamps or metal glands. A cabinet with a complete grounding design can achieve a shielding effectiveness of over 40dB in the 30-100MHz range, effectively meeting the IEC 61000-6-2 industrial immunity standard.