| 摘要 |
PROBLEM TO BE SOLVED: To provide the power system which can control the power source of the units of the whole system by operating the power switch of one unit by connecting the respective units directly by a power line and a data line and supplying electric power to the whole system through one AC/DC conversion adapter. SOLUTION: The CPU 1 of each unit 10 has a detecting means which detects the on/off operation of the power switches of the unit and other units, a control means which controls the internal switch SWa of the unit according to the detection result to turn on and off the power source current to a peripheral circuit 2, a signal means which generates and sends out a control signal based upon the on/off state of the power switch SWp of the controlled unit to other units, and the internal switch SWa which turns on and off the power source current to the peripheral circuit 2 by being controlled with the control signal and the respective units 10 are connected together directly by the power line and data line. |
