How should the spacing between the power lines and signal lines of a power DTU be set?

The spacing between DTU power lines and signal lines needs to be determined based on the voltage level and frequency. For 220VAC power lines, the parallel spacing should be greater than 30cm; when crossing, they should pass perpendicularly. For low-voltage DC power lines (e.g., 24V), the spacing between them and signal lines should be greater than 10mm. For high-frequency signal lines (e.g., clock lines), the spacing between them and power lines should be greater than three times the line width. On the PCB, power traces should be at least 2mm wide, signal traces 0.2mm wide, and the spacing should be greater than 2mm. Use a ground plane or power plane as an isolation layer. Through simulation analysis of crosstalk, the spacing should be set to ensure crosstalk is less than -40dB. In actual routing, use cable trays or partitions for physical separation. Appropriate spacing can reduce coupling noise by more than 25dB.