5-33
Cisco 2900 Series and 3900 Series Hardware Installation Guide
OL-18712-03
Chapter 5 Installing and Upgrading Internal Modules and FRUs
Replacing Power Supplies and Redundant Power Supplies
Step 2 Loosen the two captive screws on the power supply module. See Figure 5-26.
Step 3 Slide the power supply module out of the chassis.
Step 4 Insert the replacement power supply module and tighten the captive screws.
Step 5 If you are not immediately replacing the power supply, install the blank cover over the empty supply slot.
See the “Installing the Cisco 2911 Router Power Supply Blank” section on page 5-34.
Warning
Blank faceplates and cover panels serve three important functions: they prevent exposure to
hazardous voltages and currents inside the chassis; they contain electromagnetic interference (EMI)
that might disrupt other equipment; and they direct the flow of cooling air through the chassis. Do not
operate the system unless all cards, faceplates, front covers, and rear covers are in place.
Statement
1029
Installing and Removing the Cisco 2911 Router Optional DC Power Supply
Several power supply options are available for the Cisco 2911 router. See Table 5-2. All of the power
supply options have the same modular form factor for easy removal and replacement.
Warning
This unit might have more than one power supply connection. All connections must be removed to
de-energize the unit.
Statement 1028
Warning
Only trained and qualified personnel should be allowed to install, replace, or service this equipment.
Statement 1030
Installing the 2911 DC Power Supply
Perform the following steps to install the 2911 DC power supply:
Step 1 Read the “Safety Warnings” section on page 5-2 section and disconnect the power supply before you
perform any module removal or installation.
Step 2 Remove the AC power supply module from the system by loosening the two captive screws using a
number 1 Phillips head screwdriver (See Figure 5-26) and pulling the power supply out slowly from the
I/O side (See Figure 5-27) of the chassis.
Step 3 Slide the power supply module out of the chassis.
Step 4 Insert the replacement DC power supply module and tighten the captive screws. Torque to 8 to10 in-lbf
(0.9 to 1.1 N-m).
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