Table 18. Supported Rack Types; Figure 9. Static Rails - Dell PowerEdge R520 Technical Manual

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 four-post racks. Both also support tooled
mounting in threaded hole four-post racks, but only the static rails, as the more universal solution,
support mounting in two-post (Telco) racks.
Table 18 lists the rack types that the R520 supports.
Rail
Product
Identifier
B6
R520
B4
Screws are not included in either kit due to the fact that threaded racks are offered with a variety of
thread designations. You must provide your own screws when mounting the rails in threaded racks
Screw head diameter for the sliding rails must be 10mm or less.
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 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 R520 in a rack, see the
Instructions
on Dell.com/Support/Manuals.
32 PowerEdge R520 Technical Guide
Figure 9.
Table 18. Supported rack types
Mounting Interface
ReadyRails II
ReadyRails
Static rails
Rail Type
Square

Sliding

Static
Rack Types Supported
4-Post 2-Post
Round Thread Flush
X
 
  
Rack Installation
Center
X
