Dell System 310 Specifications Page 67

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Dell
Dell PowerEdge R310 Technical Guide 66
Table 24. Rail Information
Rail
Identifier
Mounting
Interface
Rail
Type
Rack Types Supported
4-Post 2-Post
Square Round Thread Flush Center
A3
ReadyRails™ Sliding
1
X
X
A4
ReadyRails™/Generic Static
1
Requires the 1U Threaded Rack Adapter Brackets Kit (Dell PN 8Y19G).
Note that screws are not included in the static rail kit due to the fact that threaded racks are offered with a
variety of thread designations. Users must therefore provide their own screws when mounting the static
rails in threaded or 2-post racks.
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 (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 an overall smaller footprint
than the sliding rails.
Figure 30. Rail Adjustability
Rail
Identifier
Rail Adjustability Range (mm)
Rail Depth
(mm)
Square Round Threaded
without
CMA
with
CMA
Min Max Min Max Min Max
A3 686 883 672 876 651 897 714 835
A4 608 879 594 872 604 890 622 -
Note that the adjustment range of the rails is a function of the type of rack in which they are being
mounted. The min-max values listed above represent the allowable distance between the front and rear
mounting flanges in the rack. Rail depth represents the minimum depth of the rail as measured from the
rack front mounting flanges when the rail rear bracket is positioned all the way forward.
15.3 Cable Management Arm (CMA)
The optional cable management arm (CMA) for the R310 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 R310 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
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