How to avoid crosstalk when multiple interfaces coexist in EPS?

EPS cabinets often contain multiple interfaces (power, communication, signal). To avoid crosstalk, systematic planning is required:

1. Physical separation and zoning: In the cabinet and PCB layout, different types of interfaces should be arranged in separate zones, such as power interface zones, communication interface zones, and analog signal interface zones, maintaining distance between them or using isolation boards.

2. Independent filtering and protection: Design independent filtering and protection circuits for each type of interface to prevent noise from being conducted between interfaces.

3. Grounding system zoning and single-point interconnection: Set up independent grounding bars or grounding areas for different interface areas, and then connect them to the main grounding bar through single points or ferrite beads/RC networks to avoid crosstalk paths formed through the grounding system.

4. Cable classification and laying: Strictly adhere to the principle of cable classification and layering, with different types of cables running in separate cable trays to avoid parallel routing.

5. Interface shielding and isolation: Use shielded connectors for all interfaces whenever possible, and adopt isolation designs (such as optocouplers, isolated transceivers) for sensitive signal interfaces. Crosstalk is managed through isolation, zoning, and good grounding.