Cisco WS-X4515 - Supervisor Engine IV Manual de usuario descargar pdf (Pagina 23)

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Catalyst 4500 Series Installation Guide

78-14409-03 B0

Chapter 1 Product Overview

Power Supplies

Power Supply Fan

Each power supply has a built-in fan. Air enters the front of the power supply

(power-input end) and exits through the back. An air dam keeps the airflow

separate from the rest of the chassis, which is cooled by the system fan assembly.

Load-Sharing Feature

When you install and turn on a second power supply on a Catalyst 4500 series

switch, it provides approximately one-half of the required power to the system. If

one power supply fails, the other power supply immediately assumes full power

to maintain uninterrupted system operation.

Note Load sharing works only when both power supplies in the chassis are the same

type.

When you install a redundant power supply, load sharing and fault tolerance are

enabled automatically; no additional software configuration is required.

In-line PWR (for

1400 W DC-input

power supplies

only)

Green Indicates the status of the in-line power connection:

-48 V passthru output voltage is enabled and is greater than

-39V and less then -60 V.

In-line PWR

(AC-input)

Off Indicates any of the following:

• Passthru breakers are not enabled

• DC input is less than -40.5 V

• One or more -48V outputs is less then -39 V.

Amber Passthru breakers are enabled and input voltage exceeds -60 V.

Table 1-5 Power Supply LEDs (continued)

LED Color/State Description

1 2 ... 18 19 20 21 22 23 24

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