The Extreme 9920 can be installed in any standard 19–inch (48 cm) deep four-post equipment rack
in a flush-mount configuration. Take care to load the rack so that it is not top-heavy.
Start installing equipment at the bottom and work up
A four-post rack-mounting kit is included in the box with your device. The kit
contains an instruction sheet, along with the following components:
Slider assemblies, one for each side of the device. Each slider assembly
consists of an outer rail, which is secured to the rack, and a sliding
rail, which is secured to a side of the device and has a mounting
bracket attached to it (2 count).
Mounting brackets that contain a thumbscrew in the lower position (2
count).
#6-32 mounting bracket and rail slide screws (20 count).
M4 screws for securing the sliding rail in place (8 count).
Screw hole rack to square hole rail adaptors (4 count).
M5 screws and washers, for the rack rail adaptors (16 count).
To attach the Extreme 9920 to a four-post rack or a cabinet, follow these steps.
Locate 4U of rack space to use
to install the Exteme 9920.
Separate the inner sliding rails
from the outer rails.
Note which direction the sliding rails slide from the outer rails for correct
installation. Separating the sliding
rails from the outer rails illustrates how to separate the sliding rails from the
outer rails.
Tighten each screw to 3.5 in-lb (0.4 N m) so that the sliding rail
can fit onto them. These screws support the sliding rail when it is
mounted in the rack.
The holes to attach the mounting bracket are near the top and the
front of the device. The mounting bracket is flush with the
faceplate of the device, and the thumbscrew is in the lower position
when the mounting bracket is attached correctly.
The M5 cage nuts should be inserted into the bottom hole of the
second rack unit from the top of the chosen location. For exmple, if
the rack location for the device rack is units 27 through 30, the M5
cage nuts are inserted in the bottom hole of rack unit 29. No cage
nuts are inserted in the bottom two rack units of the chosen
location (rack unit 28 in the example).
Slide the yellow locking sliders to the middle of each rail so that the
retention hooks latch into the rack.
Insert the rail so that the retention hooks latched in the middle hole
of the two bottom most rack units for the device are spaced
correctly.
The holes are the middle holes on rack unit 27 and rack unit 28 from
the previous example.
Slide the yellow locking sliders outward from the middle of the rail,
so that the small yellow fingers prevent the latches from being
undone.
Use four M5 screws and washers on the positions with threads to secure
the sliding rails in place.
This is the top hole on rack unit 27 and the bottom hole on rack unit
28 from the previous example.
Pull the middle rails,
and the raceways inside them, to full extension from the rack so that
they lock into place.
Align the sliding rails
that are attached to the Extreme 9920 with the middle rails on the rack
and slide the device along the rails until it reaches the extension
latch.
Toggle the extension
latch on the inner rails and finish sliding the device into the
rack.
Secure the mounting
brackets to the rack by screwing the thumbscrews on the mounting
brackets into the installed M5 cage nuts.
