3-122 Cisco 700 Hardware Installation and Mainteneance
Installing Power Supplies
Caution Do not turn on any power supplies until you are ready to power up the system. The
interlock switch that locks the power supply in the slot also turns on the system power.
Step 7 If you are installing only one power supply, proceed to the following section, “Connecting
AC and DC Power.”
Step 8 Use a number 2 Phillips or 1/4-inch flat-blade screwdriver to loosen the captive installation
screw and remove the filler plate from the upper power supply bay. Save the filler plate so
that you can replace it later if necessary.
Note Save the power supply filler plate. Install the filler plate over the upper power supply bay
whenever the system is operating with one power supply.
Step 9 Repeat Steps 2 through 6 for the second power supply.
Connecting AC and DC Power
For optimum reliability, connect redundant power supplies to separate input lines.
Connect an AC-input power supply as follows:
Step 1 On the lower supply, push the cable-retention clip down, away from the power cord port,
and plug in the power cord.
Step 2 To secure the cable in the power supply AC receptacle, push the cable-retention clip up until
it snaps into place around the connector. The cable-retention clip provides strain relief for
the AC power cord.
Step 3 Repeat steps 1 and 2 for the second power supply, if any.
Step 4 Connect each power supply cord to a separate input line.
Step 5 To connect the external interface cables to the chassis, proceed to the following section,
“Connecting Interface Cables.”
Connect a DC-input power supply as follows:
Step 1 Using a screwdriver, loosen the captive installation screws on the terminal block cover, then
lift and remove the cover. (See Figure 3-3.)
Step 2 Using a screwdriver, attach the power leads to the terminal block. (See Figure 3-3.)
The wire should be at least 8 AWG. Color code selection for the DC-input cable depends
on the color code of the DC power source at your site. Typically, negative is black, positive
is red or white, and ground is green. No matter which color coding is used, make certain it
matches that used at the DC source for negative, positive, and ground. (See Figure 3-3.)
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