STEVAL-XPLM01CPL (STMICROELECTRONICS)

The STEVAL-XPLM01CPL from STMicroelectronics is a power line communication AC coupling circuit. It includes simple two-wire connectivity to any PLC transmitter/receiver and a standard connector for an AC power cord (2-pin AC plug, 8-shape female end). The main components to achieve suitable signal coupling are PLC 1:1 transformer for differential coupling and basic electrical isolation, SM6T15CA 600W Transil +320VAC varistor for effective protection against ESD, EFT and surge disturbances from the power line, high voltage AC blocking capacitor with X2 safety class and tuning series inductor to adjust the frequency response. The STEVAL-XPLM01CPL can be very easily interfaced with the X-NUCLEO-PLM01A1 to test PLC communication performance over an AC mains network. The frequency response of the coupling circuit is wide enough to fit any narrow-band PLC signal under normal test conditions. However, it can be easily adjusted by changing only the tuning series inductor L1.