Installing Power Supplies
When using a Redundant AC Power Input Module, each individual module shares some of the
load during normal operation. The power input module in slot 1 provides AC power to the power
supplies in power supply slots 1, 2, and 3. The power input module in slot 10 provides AC power to
the power supplies in power supply slots 4 and 5. When one AC power source fails, or when one
power input module fails, the power supplies in the associated power supply slots will go into a fault
condition. The power supplies that are associated with the functioning power input module take
over the entire load.
To make sure that each segment of the split midplane receives power, install power supplies in
pairs into power supply slots in the following order, rather than the order shown in the Network
9000 Chassis Hardware Installation and Maintenance Guide: P/S 3, P/S 4, P/S 2, and P/S 5.
Figure 3-3 shows this order.
The actual installation of power supply modules is uncomplicated and is fully described in
Chapter 3. Each unused power supply slot is covered by a blank panel. To install a new power
supply module, remove the blank panel and insert the power supply module. Secure the module
with the Phillips head captive screw.
Connecting AC Power
Perform the following steps to connect AC power:
a . Set the power switch located to the left of the AC power cord connector (socket) on the rear of
both power input modules to the OFF position.
b. Plug the AC line cords (supplied) into the power cord connectors in the rear of the power
input modules and plug the other end of each into nearby power receptacles. You must
connect each power cord to a different AC circuit to ensure redundant operation of the
Network 9000 hub,
c . Set the power switches located to the left of the AC power socket on the rear of the power input
module in slot 1 to the ON position. Then do the same for the module in slot 10.
Installing and Removing the AC Power Input Module
If a Redundant AC Power Input Module fails, use the procedures described in the Network 9000
Chassis Hardware Installation and Maintenance Guide to remove the failed module and replace
it with another one.
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