Dell PowerEdge R910 - Cable Management Arm (CMA); Rack View; Rack Types Supported; Rail Adjustability Range and Depth

Dell
Dell PowerEdge R910 Technical Guide 42
Table 15. Rack Types Supported
Rail
Identifier
Mounting
Interface
Rail
Type
Rack Types Supported
4-Post
2-Post
Square
Round
Thread
Flush
Center
B2
ReadyRails™
Sliding
√
√
X
X
X
*Adapter brackets are available from Rack Solutions that allow the R910
sliding rails to mount in threaded racks. The only option available for 2-
post racks is to mount the system on a fixed shelf.
Other factors to consider when deploying the R910 include the spacing between the front and back
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. For example, use of
the CMA requires racks that are a minimum of 1m in depth with the PDUs or other rack accessories
positioned on the sides or back of the rack away from the CMA.
Table 16. Rail Adjustability Range and Depth
Rail Adjustability Range (mm)
Rail Depth (mm)
Square
Round
Threaded
Without
CMA
With
CMA
Min
Max
Min
Max
Min
Max
686
883
672
876
—
—
755
883
The min-max values listed above represent the allowable distance between the front and back
mounting flanges in the rack. Rail depth without the CMA represents the minimum depth of the rail
with the outer CMA brackets removed (as measured from the front mounting flanges of the rack).
14.3 Cable Management Arm (CMA)
The optional cable management arm (CMA) for the R910 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 R910 CMA include:
 Large U-shaped baskets to support dense cable loads
 Open vent pattern for optimal airflow
 Fully reversible (can be mounted on either side) with no conversion required
 Utilizes hook-and-loop straps rather than plastic tie wraps to eliminate the risk of cable
damage during cycling
 Includes a low profile fixed tray to both support and retain the CMA in its fully closed position
 Both the CMA and the tray mount without the use of tools via simple and intuitive snap-in
designs
14.4 Rack View
The R910 ReadyRails sliding rails are a “drop-in” design, meaning that the system is installed
vertically into the rails by inserting the shoulder nuts on the sides of the system into the J-slots in
the inner rail members with the rails in the fully extended position.