NEC Express5800/320Ma Installationsanleitung PDF herunterladen (Seite 18)

Installing a Rack-Mounted System

2-2 Express5800/320Ma: System Installation Guide

Installing a Rack-Mounted System

Before installing the system, ensure that:

• Your cabinet (if you are installing the system in your own cabinet) meets the

requirements described in the Express5800/320Ma: Site Planning Guide.

• The site has been prepared as described in the Express5800/320Ma: Site

Planning Guide.

If you are using power distribution units (PDUs), install them in your cabinet as

described in Chapter 5, “Installing PDUs” before you install the system.

A rack-mounted system consists of the components shown in Figure 1-2.

To install a rack-mounted system, see the following sections:

• “Numbering the Vertical Rails” on page 2-2

• “Attaching Mounting Brackets to the Cabinet Vertical Rails” on page 2-5

• “Installing the Shelf Unit” on page 2-7

Numbering the Vertical Rails

Each system requires 4U, equal to 12 holes, of vertical space.

NOTE

The cabinet rails and the system are measured in EIA

rack units (U). One U equals 1.75 in. (4.45 cm).

Every three square holes on the EIA square-hole pattern

on the vertical rail equals one U. The square holes on EIA

rails are located in a repeating pattern of 1/2 in. (1.27 cm),

5/8 in. (1.59 cm), 5/8 in. (1.59 cm), as shown in

Figure 2-1.

The middle hole of each U has equal spacing between it

and the holes adjacent to it. In some cabinets, numbers on

the vertical rails identify the middle hole of each U.

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 75 76

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NEC Express5800/320Ma Installationsanleitung Seite 18