CHAPTER 5
Installing a Power Supply
• Power Supply Modules Overview, on page 81
• Installation Guidelines, on page 86
• Installing or Replacing an AC Power Supply, on page 87
• Installing a DC Power Supply, on page 89
• Finding the Power Supply Module Serial Number, on page 94
Power Supply Modules Overview
The switch operates with either one or two active power supply modules. A switch that is part of a StackPower
stack operates with power that is supplied by other stack switches. Two power supply modules can be powered
up from two different phases.
You can use two AC modules or one module and blank cover. All power supply modules have internal fans.
All switches ship with a blank cover in the second power supply slot.
Cisco Catalyst 9300 Series Switches Hardware Installation Guide
81
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