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Catalyst 4900 Series Switch Installation Guide
78-18039-02
Chapter 1 Product Overview
Switch Components
Figure 1-9 On/Off Switch Locations
The switch will start with only one power supply plugged in, but redundant
failover and load sharing will not be available in this configuration. We
recommend that you always connect both power supplies to separate AC or DC
circuits for optimal power reliability.
For safety reasons, the AC power supply needs to be switched off and unplugged
before it is removed from a chassis or inserted into a chassis. DC supplies should
have power shut off from the source before they are removed.
If only one power supply will be used, you must use the blank faceplate supplied
to cover the empty power bay.
Environmental Monitoring of the Power Supplies
Using the environmental monitoring and reporting functions, you can maintain
normal system operation by resolving adverse environmental conditions prior to
loss of operation.
Each power supply monitors its own temperature and output voltages. The switch
senses the operating condition of the power supply and reports status through
software.
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On/Off Switch
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