美国埃施朗PL3120模块版本1，电力线传输模块，内含PCB（请用PADS或PCAD或AD09打开）及原理图，电力载波技术的福音，中文网上仅此一份-U.S. Echelon PL3120 module version 1, power line transmission module, containing PCB (please open the PADS or PCAD or AD09) and schematic, power line carrier technology, the Go