Rack Rails; Cable Management Arm (Cma) And Strain Relief Bar (Srb) - Dell PowerEdge R940 Technical Manual
Latest 4-socket, 3u monolithic rack server
designed for complex workloads using highly scalable memory and network options
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Also See for PowerEdge R940:
- Installation and service manual (161 pages) ,
- Service (14 pages) ,
- Instruction (10 pages)
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The rail offerings consist of sliding rails only.
The sliding rails allow the system to be fully extended out of the rack for service. There is also an optional Cable Management Arm (CMA)
and optional Strain Relief Bar (SRB).
Figure 7. Sliding rails with optional CMA and optional SRB
One key factor in selecting the proper rails is identifying the type of rack in which they will be installed. Both the sliding rails and the static
rails support tool-less mounting in 19"-wide, EIA-310-E-compliant square hole and unthreaded round hole 4-post racks. Both also support
tooled mounting in threaded hole 4-post racks, but only the static rails, as the more universal solution, support mounting in 2-post (Telco)
racks.
Table 15. Sliding rail
Product
Rail
Rail type
identifier
R940
B12
Sliding
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.
Cable Management Arm (CMA) and Strain Relief Bar
(SRB)
The optional cable management arm (CMA) and Strain Relief Bar (SRB) organizes and secures the cords and cables exiting the back of the
server. The CMA supports up to medium size cable loads and unfolds to allow the server to extend out of the rack without having to
28
Rack Rails
Mounting
Rail adjustability range (mm)
interface
Square
Round
min
max
min
ReadyRails II 600
894
586
Min rail mounting depth (mm)
Threaded
max
min
max
Without CMA
or SRB
887
600
909
773
9
Rack Rails
With
With SRB
CMA
926
877
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