Dell PowerEdge R420 Manuale tecnico - Pagina 32

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The static rails (shown in Figure 9) support a wider variety of racks than the sliding rails but do not

support serviceability in the rack and are therefore are not compatible with the CMA.

One key factor in selecting the proper rails is identifying the type of rack in which they will be

installed. Both the sliding rails and the static rails support tool-less mounting in 19"-wide, EIA-310-E

compliant square hole and unthreaded round hole 4-post racks. Both also support tooled

mounting in threaded hole 4-post racks, but only the static rails, as the more universal solution,

support mounting in 2-post (Telco) racks.

Table 19 lists the rack types that the R420 supports. The R420 is backward compatible with the R410

rails and CMA.

Rail

Product

Identifier

R420

Other key factors governing proper rail selection include the spacing between the front and rear

mounting flanges of the rack, the type and location of any equipment mounted in the back of the

rack such as power distribution units (PDUs), and the overall depth of the rack. Due to their reduced

complexity and lack of need for CMA support, the static rails offer a greater adjustability range and a

smaller overall mounting footprint than the sliding rails.

For detailed information about static and sliding rails, see the Rack rail specifications section in

Appendix A. For more information on installing the R420 in a rack, see the

Instructions

on Support.Dell.com/Manuals.

Mounting Interface

ReadyRails II

ReadyRails

Rack Types Supported

Rail Type

4-Post

Square

Round



Sliding



Static

2-Post

Thread

Flush

Center



Rack Installation

