Dell PowerSwitch S4148U-ON Посібник з монтажу - Сторінка 33

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The S4100–ON Series (S4128F-ON, S4148F-ON, S4148FE-ON, S4128T-ON, S4148T-ON, and S4148U-ON) switch ships with

two AC or DC power supplies.

The power supplies have two air-flow directions, normal and reverse. Normal is from the I/O-side to the PSU-side. Reverse is

from the PSU-side to the I/O-side.

The PSUs are field replaceable. When running with full redundancy—two power supplies installed and running, you can remove

and replace one PSU without disrupting traffic.

CAUTION:

To prevent electrical shock, ensure that the switch 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.

NOTE:

Connect the power supply to the appropriate branch circuit protection as defined by your local electrical codes and

verify that the remote power source complies with the switch input power specifications.

NOTE:

If you use a single PSU, install a blank plate in the other PSU slot. Use power supply 2 (PSU2) as the blank plate

slot. To install the blank plate, use a #1 Philips screw driver.

NOTE:

ESD damage can occur if components are mishandled. Always wear an ESD-preventive wrist or heel ground strap

when handling the S4100–ON Series switch and its components.

Topics:

•

•

AC or DC power supply installation

•

DC power supply connection

Components

The following power supply options are available for the S4100-ON Series switch:

● AC or DC power supply with integrated fan

● AC or DC power supply with integrated reverse flow fan

Power supply 1 (PSU1) is on the left side of the switch; power supply 2 (PSU2) is on the right side of the switch.

Figure 23. S4100-ON Series PSUs

1. PSUs

The PSUs have an integrated fan that you cannot replace individually; if the fans integrated in a PSU fail, you must replace the

entire PSU. You can replace the fan trays individually. For fan tray replacement procedures, see Fans.

WARNING:

Prevent exposure and contact with hazardous voltages. Do not attempt to operate this switch with

the safety cover removed.

Power supplies