Cable Management Arm - Dell PowerEdge T420 Technical Manual

mounted in the back of the rack such as power distribution units (PDUs), and the overall depth of
the rack.
For detailed information about sliding rails, see the Rack rail specifications section in Appendix A. For
more information on installing the T420 in a rack, see the
Dell.com/Support/Manuals.

Cable management arm

The optional CMA organizes and secures the cords and cables exiting the back of the server and
unfolds to allow the server to extend out of the rack without having to detach the cables. Some key
features of the T420 CMA include:

Large U-shaped baskets to support dense cable loads

Open vent pattern for optimal airflow

Ability to be mounted on either side

Use of hook-and-loop straps rather than plastic tie wraps to eliminate the risk of cable damage
during cycling

Low-profile fixed tray to both support and retain the CMA in its fully closed position

Ability to mount the CMA and tray without the use of tools, due to snap-in designs
34 PowerEdge T420 Technical Guide
Rack Installation Instructions
on