Chapter 1 Product Overview
Switch Components
1-18
Catalyst 4000 Series Switch Installation Guide
78-6120-10
When you install a redundant power supply, load sharing and fault tolerance are
enabled automatically; no additional software configuration is required.
Environmental Monitoring Feature
With the environmental monitoring and reporting feature, you can keep your
system running by resolving adverse environmental conditions before loss of
operation. The power supply monitors its own internal temperature and voltages.
In the event of excessive internal temperature, the power supply shuts down to
prevent damage. When the power supply returns to a safe operating temperature,
it restarts. If the power supply output voltage is abnormal, the LED labeled
OUTPUT FAIL will light. An instance of substantial input overvoltage can shut
down the power supply.
The supervisor engine monitors the status of each power supply and provides a
status report through the switch software. For more information on how the
supervisor engine monitors the power supplies, refer to the
Catalyst 4500 Series
Module Installation Guide
.
External Power Shelf
The Catalyst 4006 external power shelf contains up to three single-phase, AC-DC,
1050 W, –52 V output power supplies, which can provide Power over Ethernet to
enabled switching modules when used with the power entry module.
