NEC Express5800/320Ma Installationsanleitung PDF herunterladen (Seite 40)

Connecting an External USB Floppy Disk Drive

4-6 Express5800/320Ma: System Installation Guide

Connecting an External USB Floppy Disk Drive

Use the USB extension cable to connect an optional USB floppy disk drive to a USB

port on the system as follows:

1. Connect the USB extension cable to the cable on the floppy disk drive.

2. Connect the USB extension cable to one of the system USB ports. Item 3 in

Figure 4-1 and item 5 in Figure 4-2 show the USB ports on the system.

NOTES

1. Software generally assigns the letter A to the optional

floppy disk drive when it is first connected to a USB

port. If you subsequently connect the drive to a

different USB port or if the system fails over, software

may assign the letter B to the disk drive.

2. Do not connect the floppy disk drive to the USB hub

on the keyboard. The keyboard does not supply the

power required by the floppy disk drive.

Connecting the System to Electrical Power

This section describes how to connect both the rack-mounted and pedestal systems to

electrical power.

• “System Power Overview” on page 4-6

• “Connecting the System Directly to AC Power (Mains)” on page 4-7

• “Connecting the System to a UPS” on page 4-10

• “Connecting the Systems to Power Through PDUs” on page 4-13

System Power Overview

Your system requires at least two separate and independent AC power outlets, an

A-side power source and a B-side power source. Either source must be capable of

continuing to provide power if power to the other source is lost.

The A-side power source provides power to the top CPU0I/O enclosure and a

keyboard-video-mouse (KVM) switch. If you use a UPS, the UPS is the A-side power

source.

The B-side power source provides power to the bottom CPU- I ⁄ Oenclosure.

A pair of PDUs supplies power to multiple systems and components in a cabinet. The

top PDU in the cabinet provides A-side power. The bottom PDU in the cabinet provides

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NEC Express5800/320Ma Installationsanleitung Seite 40