NEC POWERMATE PRO150, Руководство пользователя

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PowerMate Pro150 System
4-7
Add-in Board Considerations
The next few procedures tell how to remove and install slot covers and
add-in boards. As an aid to installing boards in your system, this section
describes the arrangement and numbering conventions for the slot
connectors on the system board.
Figure 4-3 shows the numbering convention for the connectors on the
system board and for the slot openings on the back panel. Figure 4-3, A
shows the slot openings on the system back panel, and Figure 4-3, B the
connectors on the system board. The numbers are for reference only and
are not actually printed on the system board or the back panel. There are
two slot connectors numbered 3 in Figure 4-3 because slot opening 3 in the
back panel can hold either a PCI or an ISA board (but not both at the same
time). Due to the physical arrangement of the PCI and ISA slot connectors,
slot opening 7 in the back panel is never used.
ISA-compatible add-in boards can be installed in any of the system board
ISA slots. PCI-compatible add-in boards can be installed in any of the PCI
slots. There are no board-length limitations; you can install full length add-
in boards in any slot.
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CAUTION
Do not overload the system board by installing add-in
boards that draw excessive current. The system is designed
to provide 2 A (average) of +5 V power for each board in
the system. The total +5 V current draw for add-in boards
in a fully-loaded system (all six add-in board slots filled)
must not exceed 12 A.
Add-in boards can be extremely sensitive to ESD and
always require careful handling. Hold the board by the
edges only; do not touch the electronic components or gold
connectors. After removing a board from its protective
wrapper or from the system, place it flat on a grounded,
static-free surface, component-side up. Do not slide the
board over any surface.