| 摘要 |
PROBLEM TO BE SOLVED: To accurately measure and record currents for respective current sensors which are sent from the current sensors disposed in a power supply system and which vary dynamically. SOLUTION: A plurality of sensor units 11 are disposed in a power supply system of IT equipment in a data center. Each of the sensor units 11 comprises an AC current sensor 12 installed in the power supply system; a rectifying part 13 for rectifying the output of the sensor 12; an A/D converter 14 for digitally converting output of the rectifying part 13; and an interface part 15 for sending the output of the A/D converter 14, to a higher-level device. A sensor control unit 21 comprises interface parts 22a-22n for receiving signals from the plurality of sensor units 11; a selection part 23 for selecting signals from the interface parts; a higher-level interface part 24 for receiving instructions and data from the higher-level device and sending data, corresponding to the instructions, to the higher-level device; and a microprocessor 27 for connecting a nonvolatile memory 25 to a clock transmitter 26. COPYRIGHT: (C)2009,JPO&INPIT
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