| 摘要 |
<p>PURPOSE:To prevent a single power supply unit from being controlled by two controllers for system power supply by providing two functions to a controller for system power supply which can control plural power supply units. CONSTITUTION:A PU control inhibiting circuit 4 is provided into a system power supply device SPCU1 to avoid a fact that a power supply unit PU under control is controlled by another SPCU. The SPCU1 inhibits the circuit 4 from controlling a PU of the corresponding number when the SPCU1 receives a PU control under-execution signal 7 sent from another SPCU and a PU number 8 which is under execution. While the SPCU1 transmits a control under-execution signal 13 of its own and a PU number under execution to another SPCU. With such two functions, it is avoided that a single PU is controlled by two devices SPCU.</p> |
