Technical Guide

Table Of Contents
Rack, rails, and cable management
Key factors in selecting the proper rails include, Identifying:
Type of rack in which the rails will be installed
Spacing between the front and rear mounting flanges of the rack
Type and location of any equipment mounted on the rear of the rack such as power distribution units (PDUs), and the overall
depth of the rack
Reference the DellEMC Enterprise Systems Rail Sizing and Rack Compatibility Matrix for the following information:
Specific details about rail types and their functionalities
Rail adjustability ranges for various rack mounting flange types
Rail depth with and without cable management accessories
Rack types supported for various rack mounting flange types
Topics:
Rails information
Cable Management Arm
Strain Relief Bar
Rails information
The R650xs supports both sliding rails and static rails. Both rails have a slim rail design that supports the wide system chassis.
Sliding rails
The sliding rails, shown in the figure below, allow the system to be fully extended out of the rack for service. The sliding rails
have a Cable Management Arm (CMA) and a Strain Relief Bar (SRB) option.
There are one types of sliding rails available:
Stab-in/Drop-in sliding rails
A11 Stab-in/Drop-in sliding rails for 4-post racks
Supports Drop-in or Stab-in installation of the chassis to the rails
Supports tool-less installation in 19-inch EIA-310-E compliant square, unthreaded round hole racks including all generations of
Dell racks.
Also supports tool-less installation in threaded round hole 4-post racks
Supports full extension of the system out of the rack to allow serviceability of key internal components
Supports optional Cable Management Arm (CMA)
NOTE:
For situations where CMA support is not required, the outer CMA mounting brackets can be uninstalled from
the sliding rails. This reduces the overall length of the rails and eliminates the potential interferences with rear mounted
PDUs or the rear rack door.
Supports optional Strain Relief Bar (SRB)
NOTE:
Scan the QRL code for the documentation and troubleshooting information regarding the installation procedures for
Drop-in/Stab-in rail types.
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34 Rack, rails, and cable management