| 摘要 |
A power sub-system controls a supply of power to a field replaceable unit for electronic equipment. The power sub-system includes a power controller that is arranged, in response to the detection of a fault, to switch off the supply of power to a field replaceable unit. The power controller is then responsive to a sequence of two events to switch on the supply of power to the field replaceable unit. The first event is a first change in state of an interlock signal indicative of the field replaceable unit being released. The second event is a change of state of the interlock signal indicative of a field replaceable unit being secured in position. Automatic power management can thus provided with requiring a maintenance engineer to restore power manually, this being achievable simply by the removal and replacement of the field replaceable unit. The field replaceable unit includes an interlock mechanism for locking the field replaceable unit in the electronic equipment. An interlock switch is operated by the interlock mechanism and causes an interlock signal line to be connected to a source of the predetermined potential when the interlock mechanism locks the field replaceable unit in the electronic equipment. It is changes on the interlock signal line that are detected by the power controller.
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