Connecting Source Power to the Power Supplies
Cisco 12008 Gigabit Switch Router Installation and Configuration Guide
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Note You should not install two power supplies of either type unless you intend to use
both units. In other words, you should not install two power supplies and power the router
with only one of the units. Powering the router with a si n gle p ower supply while using the
other bay to “store” an inert unit may disrupt the normal flow of cooling air through the
power supply bays.
Depending on the power supply type installed in your router, refer to one of the two
following sections for instructions on connecting source power to the power supply.
Note Detailed instructions for installing or replacing power supplies are also contained in
the configuration notes entitled Cisco 12008 Gigabit Switch Router AC-Input Power Supp ly
Replacement Instructions (document number 78-4954-01) and Cisco12008 Gigabit Switch
Router DC-Input Power Supply Replacement Instructions (document number 78-4955-01).
A configuration note accompanies each power supply that is ordered and shipped from the
factory as a field-replaceable unit (FRU). These configuration notes are also available on
the Cisco Documentation CD and on Cisco Connection Online (CCO).
Connecting Source Power to an AC-Input Power Supply
In the following procedure, you are assumed to have an AC-input power supply already
installed in your router; you need to connect it to an AC power source. If an AC-input power
supply is not already installed, perform the procedures in the earlier section entitled
“Reinstalling the Power Supplies in the Router” before attempting to connect source AC
power to the unit.
If you equip your router with a single AC-input power supply, install it in the bottom power
supply bay.
Note All electrical connections between the power supply and the backplane are
accomplished automatically when the power supply is installed in the power supply bay.