Table 12. Sliding and Static Rails
Rail
identifi
er
Mounting
interface
Rail type
Supported rack types
4-Post
2-Post
Square
Round
Thread
Flush
Center
B6
Ready Rails II
Sliding
√
√
√
X
X
B4
Ready Rails
Static
√
√
√
√
√
NOTE:
Screws are not included in either 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 rails in threaded racks.
NOTE:
Screw head diameter for the sliding rails must be 10 mm or less.
Other key factors governing proper rail selection include the following:
•
Spacing between the front and rear mounting flanges of the rack
•
Type and location of any equipment mounted in the back of the rack such as power distribution units (PDUs)
•
Overall depth of the rack
The static rails offer a greater adjustability range and a smaller overall mounting footprint than the sliding rails. This is because of their
reduced complexity and lack of need for CMA support.
Table 13. Static Rails Adjustability
Rail
Identifier
Rail Type
Rail Adjustable Range (mm)
Rail Depth (mm)
Square
Round
Threaded
without
CMA
with CMA
Min
Max
Min
Max
Min
Max
B6
Sliding
676
868
662
861
676
883
714
845
B4
Static
608
879
594
872
604
890
622
N/A
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 without the CMA represents
the minimum depth of the rail with the outer CMA brackets removed (if applicable) as measured from the front mounting flanges of the
rack.
Cable management arm (CMA)
The optional cable management arm (CMA) organizes and secures the cords and cables exiting the back of the systems. It unfolds to allow
the systems to extend out of the rack without having to detach the cables. Some key features of the CMA include:
•
Large U-shaped baskets to support dense cable loads
•
Open vent pattern for optimal airflow
•
Ability to be mounted on either side by simply swinging the spring-loaded brackets from one side to the other
•
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
The CMA can be mounted to either side of the sliding rails without the use of tools or the need for conversion. However, it is recommended
that it be mounted on the side opposite to the power supplies to allow easier access to the power supplies and rear hard drives (if
applicable) for service or replacement.
Removing and installing components
71
