Installing the DXi4700 System in the Rack
Quantum DXi4700 Installation Guide
43
Locating the Mounting Position
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 addition 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
). Rack
cabinets may have round or square holes. For more information, refer to the
DXi4700 Site Planning Guide
.
Figure 31:
Rail Hole Pattern
1U (44 mm [1.75 inches])
12.7 mm (0.5 inch)
15.9 mm (0.625 inch)
15.9 mm (0.625 inch)
12.7 mm (0.5 inch)
WARNING:
If the rack is empty at the time of installation, do NOT install the DXi4700 chassis too high
in 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
Installing 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
).
2. Align each back end piece in the bottom and top holes of the desired U spaces.
3. Engage the back end of the rail until it fully seats on the vertical rack flange and the latch clicks into
place. Repeat these actions to position and seat the front end piece on the vertical rack flange.
