12
When installing motherboards in a 4100U/4100ES expansion bay, adhere to the following
guidelines:
• Each expansion bay assembly includes a chassis, two end supports, one LED/switch frame,
and a power distribution interface (PDI) board.
• An expansion bay holds up to eight 4” x 5” modules. A double-size module, such as the
expansion power supply (XPS), takes up two blocks of space as shown below.
• Up to seven 2” x 11 ½” motherboards or three 4” x 11 ½” motherboards can be installed in an
expansion bay if no 4” x 5” modules are installed in the bay. Motherboards are mounted on
top of the PDI in expansion bays. The data and power that would normally be bussed via the
PDI is instead routed across the boards via ribbon cable from one board to the next.
• As shown in the figure below, motherboards can be installed alongside 4” x 5” cards, if
necessary.
• The leftmost slot must not contain a motherboard.
• 4” x 5” cards must be added from right to left.
• Motherboards must be added from left to right.
No Boards
Allowed
in
This Slot
PDI
4x5 Module
Expansion Power
Supply
(XPS)
4x5 Module
I/O Wiring
I/O Wiring
I/O Wiring
4100 Option
4100 Option
4100 Option
Slot 1 Slot 2 Slot 3 Slot 4
Position
5
Position
6
Position
7 & 8
Figure 7. Installing the Motherboard in a 4100U/4100ES Expansion Bay
Continued on next page
Installing Boards into 2975-94xx Back Boxes (4100U/4100ES), Continued
Installing 4100-3201
to -3203
Motherboards into a
2975-94xx
Expansion Bay
Block E Slots 7 + 8
Block F
The 4120-3002
motherboard takes up
two slots.
This slot cannot contain
a motherboard unless
the pins on P1 (or
leftmost pin connector)
are removed.
To Next Page
Loading...
