Dell Force10 S55 Manuale - Pagina 27

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Power Supplies

The S55 is designed to support two hot-swappable power supplies with integrated fans that provide the

cooling for the chassis. There are two types of power supplies (AC or DC) and there are two air-flow

directions (Normal and Reversed). Two power supplies are required for full redundancy, but the system

will operate with a single power supply. A blank panel must be attached is redundant power supplies are

not installed.

Refer to

Chapter 6, Fans

The S55 is orderable as an empty chassis (S55T) or with either AC or DC power. The S55T-AC/S55T-

AC-R system comes from the factory with 1 AC power supply and 2 fan modules installed in the chassis.

The S55T-DC/S55T-DC-R system comes from the factory with 1 DC power supply and 2 fan modules

installed in the chassis. Both power supply types are field replaceable. When running with full

redundancy (2 power supplies installed and running) a power supply unit can be removed an replaced

while the other is running without disrupting traffic.

WARNING: To prevent electrical shock, make sure the S55 is grounded properly. If you do not ground your

equipment correctly, excessive emissions may result. Use a qualified electrician to ensure that the power

cables meet your local electrical requirements.

WARNING: Electrostatic discharge (ESD) damage can occur if components are mishandled. Always wear an

ESD-preventive wrist or heel ground strap when handling the S55 and its components.

Components

The following power supply options are available for the S55:

• AC power supply with integrated fan (Catalog# S55-PWR-AC)

• AC power supply with integrated reverse flow fan (Catalog# S55-PWR-AC-R)

• DC power supply with integrated fan (Catalog# S55-PWR-DC)

• DC power supply with integrated reverse flow fan (Catalog# S55-PWR-DC-R)

Install an AC or DC power supply

The power supply units in the S55 are field replaceable. When both power supplies are up and running,

one power supply can be removed without interrupting traffic. To remove and replace a power supply

unit, use the following procedure.

The power supply units are in a single piece with fans. You can replace the fan individually, but replacing

a power supply also replaces the fans attached to that power supply. Refer to

procedure to replace only the fan.

CAUTION: Remove the power cable from the modules prior to removing the module itself. Power must not be

connected prior to insertion in the chassis.

for the procedure to replace only a fan module.

Chapter 6, Fans

for the

Power Supplies