POWER SOURCING EQUIPMENT AND METHOD FOR CABLE RESISTANCE DETERMINATION IN HIGH-POWER POE NETWORKS

摘要

the present invention of an exemplary embodiment of a power cable for power supply plant resistance to the crystal (PSE) a . The power supply system includes a first power supply to cause the first current flowing through first and second output terminals of the power supply equipment . The power supply system further includes a second power supply for causing a second current flowing through the third and the fourth output terminal of the power supply equipment . Power supply equipment in order to determine the resistance of the power cable , and a second current from the first current offset (offset) further includes a current modulation circuit for generating the offset voltage between the second and first supply voltage . Using the current modulation circuit includes a variable resistor switch for adjusting the second current is offset a second current from the first current . ;