4-2
Catalyst 4500 E-Series Switches Installation Guide
OL-13972-02
Chapter 4 Removal and Replacement Procedures
Removing and Installing the AC-Input Power Supplies
Warning
Before working on equipment that is connected to power lines, remove jewelry (including rings,
necklaces, and watches). Metal objects will heat up when connected to power and ground and can
cause serious burns or weld the metal object to the terminals.
Statement 43
Warning
Ultimate disposal of this product should be handled according to all national laws and regulations.
Statement 1040
For procedures to remove and replace supervisor engines and switching modules, see the Catalyst 4500
Series Module Installation Guide.
Removing and Installing the AC-Input Power Supplies
This section describes how to remove and install the AC-input power supplies for the Catalyst 4500-E
series switches. The section is contains the following topics:
• Required Tools, page 4-3
• Removing an AC-Input Power Supply, page 4-4
• Installing an AC-Input Power Supply, page 4-6
Warning
Hazardous voltage or energy is present on the backplane when the system is operating. Use caution
when servicing.
Statement 1034
Figure 4-1 shows a single-input AC-input power supply and Figure 4-2 shows a dual-input AC-input
power supply.
Note The power supplies are hot-swappable, so in redundant mode, you will not need to power down the
switch to replace or upgrade most power supplies. With dual power supplies running in combined mode,
some chassis slots may lose power during an upgrade or power supply replacement.
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