Cisco Systems Boat Cisco Systems Boat User Manual

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3-19
Cisco Catalyst 4900M Switch Installation Guid e
78-18350-02
Chapter 3 Installing the Switch
Rem ovi ng a nd Replaci ng the Power Supp ly
Removing and Replacing the Power Supply
This section describes how to remove and install the AC and DC-input power supplies. This information
is presented in the following sections:
• Required Tools, page 3-19
• Removing a Power Supply, page 3-19
• Installing a Power Supply, page 3-20
Wa r ni n g
Hazardous volt age or energy is p resent on th e backp lane when the system is o perating. Use caution
when ser vic ing.
Statement 1034
Locate your power supply and notice the location of the captive installation screws.
Note The power supplies are hot-swappable, so in redundant mode you will not need to power down the switch
to replace most power supplies. In combined mode some slots may lose power during power supply
replacement.
Required Tools
You will need a flathead or Phillips screwdriver or 5/16” nut driver or socket to perform these
procedures.
Removing a Power Supply
Follow these steps to remove a power supply:
Step 1 Set the power switch to the off (O) position.
Caution For DC installations, the DC power source or panel breaker should be powered down before
disconnecting input power cables from the 1000W DC power supply.
Step 2 Disconnect the power cord or cords from the power supply being removed.
Step 3 Loosen the captive screws.
Caution Use both hands to remove a power supply.
Step 4 Grasp the power supply handles and pull the power supply out an inch to unseat the backplane
connections. Place one hand underneath to support the bottom of the power supply.
Step 5 Pull the power supply out of the bay and set it aside.

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