CompactPCI 3U Chassis

VMIC, Inc.-310 chassis is an aluminum 3U rack-mount, 19-in. enclosure with one system slot and seven user-available I/O slots. It also includes a 320-W power supply unit. The backplane has a system slot on the rightmost end of the board. One slot, next to a system slot, is skipped with the remaining seven user slots placed side-by-side across the backplane. This accommodates larger CPU modules without sacrificing a peripheral slot. FDD and IDE HDD units connect to the system board through cables rather than using a separate board module in one of the 3U CompactPCI (CPCI) slots. The backplane design is a two-mm thick, eight-layer PCB with sufficient strength to sustain repeated plug and unplug cycling of the CPU and I/O boards. Signal quality is also guaranteed by careful backplane trace layout.

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