Table 24. Supported Rack Rail System; Figure 11. Static Rails - Dell PowerEdge R620 Technical Manual

The static rails (shown in Figure 11) 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 24 lists the rack rail systems that the R620 supports. The R620 is not compatible with any
other Dell rails or CMAs, including previous generation rails.
Rail
Product
Identifier
A7
R620
A8
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, 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 R620 in a rack, see the
Instructions
on Dell.com/Support/Manuals.
39 PowerEdge R620 Technical Guide

Figure 11. Static rails

Table 24. Supported rack rail system
Mounting Interface
ReadyRails II
ReadyRails
Rack Types Supported
Rail Type 4-Post
Square Round

Sliding

Static
2-Post
Thread Flush Center
 
X
  
Rack Installation
X
