How to properly wire power line carrier signal cables for PLCs?

Standardized power line carrier signal line routing for PLCs must adhere to impedance control, length matching, and isolation principles. Use differential pair routing with a line width of 0.2mm and a spacing of 0.3mm, ensuring a characteristic impedance of 100Ω ± 10% through layer stack-up calculations. Match the routing length with an error of less than 5mm to avoid signal skew. Keep signal lines away from power and clock lines, with parallel spacing greater than three times the line width. Place return vias at layer transitions to ensure a continuous return path. Use microstrip or stripline structures, ensuring a complete reference ground plane. For long-distance routing, place a 10pF capacitor to ground every 10cm to reduce ringing. Verify signal integrity through simulation, ensuring an eye diagram opening greater than 80%. In actual testing, use an oscilloscope to measure signal quality; rise time should be within the specified range, and overshoot less than 10%. Standardized routing can improve signal quality by 30% and reduce the bit error rate.