| 摘要 |
The system safety device includes a back power supply pin for supplying power for a bus interface logic through the longest pin, a logic power supply pin shorter than the back power supply pin for supplying main power, a board setting completion signal pin shorter than the logic power supply pin for supplying signal informing the completion of the board setting, a back plane having a signal pin for transmitting/receiving data, an input power protecting circuit for supplying the predetermined power for the bus interface logic after preventing noise and overcurrent generated when the power for the bus interface logic is supplied to the longest pin of the back plane, a module setting sensing circuit for sensing that a module is set on the back plane, and an output driving circuit for allowing the transmitting and receiving of data through the signal pin of the back plane after the module is attached.
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