Quantum DXi4700 Upgrade Manual page 29

Locating the Mounting
Position
Figure 26 Rail Hole Pattern
Installing the DXi4700
Expansion Module
Installing Expansion Modules
The DXi4700 system is designed to fit in a standard 19 inch (48.3 cm) wide rack.
It is important for the chassis installation to locate the hole pattern in the rack
rails. You must allow 2U (3.4 inches or 8.7 cm) of vertical space for the DXi4700
Node and an additional 2U for each Expansion module (JBOD) installed in the
rack.
Rack cabinets that meet EIA-310 standards have an alternating pattern of three
holes per rack unit with center-to-center hole spacing (beginning at the top hole
of a 1U space) of 15.9 mm, 15.9 mm, and 12.7 mm (0.625 inch, 0.625 inch, and
0.5 inch) for the front and back vertical rails (see
have round or square holes. For more information, refer to the
Planning Guide
(6-67960).
1U (44 mm [1.75 inches])
Narrowest
metal strip
WARNING: If the rack is empty at the time of installation, do NOT install the
DXi4700 chassis above the midpoint of the rack. The weight of
the chassis may cause the rack to become "top heavy" and
unstable if installed in the top of an empty rack.
To mark the rack, place a mark (or tape) on the rack's front vertical rails where
you want to locate the bottom of the unit you are installing in the rack. The
bottom of each 1U space is at the middle of the narrowest metal strip between
holes (marked with a horizontal line on some rack cabinets).
Installing the DXi4700 Expansion Module consists of the following steps:
• Installing the DXi4700 Expansion Module Rack Mounting Rails
• Installing the DXi4700 Expansion Module
Installing the DXi4700 Expansion Module Rack Mounting Rails
Follow these steps to install the DXi4700 Expansion module rack mounting rails:
1 Position the left and right rail end pieces labeled FRONT facing inward, and
orient each end piece to seat in the holes on the front side of the vertical
rack flanges (see Figure
2 Align each back end piece in the bottom and top holes of the desired U
spaces.
Quantum DXi4700 Capacity Upgrade Guide
Figure
12.7 mm (0.5 inch)
15.9 mm (0.625 inch)
15.9 mm (0.625 inch)
12.7 mm (0.5 inch)
27).
6-68107-03 Rev C
December 2016
26). Rack cabinets may
DXi4700 Site
29