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1-4 Rack Installation Guide
Attaching the Brackets
1. Measure the rack to determine if the two-post relay rack is 3 inches wide or
6 inches wide. The rearmost bracket on each side can be positioned for either 3-
or 6-inch wide racks.
2. Align a bracket on the right side of the chassis, oriented so that the flange that
fastens to the two-post rack is facing backward. The two top mounting holes
must be aligned with the fourth and fifth holes on the side of the system chassis
(see Figure 1-3).
3. Secure the front bracket to the system chassis using two 10-32 x 0.25-inch
screws (see Figure 1-3).
Repeat this step to install the remaining front bracket to the other side of the
system chassis.
Figure 1-3. Securing the System in the Rack
12-24 x 0.5-inch
pan-head Phillips
screws (2 per
bracket)
10-32 x 0.25-inch
pan-head Phillips
screws (For 3-inch
wide rack: 2 per
bracket. For 6-inch
wide rack: 2 per
front bracket, 1
per back bracket)
holes for 3-inch wide rack
fifth hole from front
fourth hole
from front
hole for 6-inch
wide rack (only
front hole is
used)