IBM 0551, Manual

Page: 81 / 182

To use the rack-mounting template, complete these steps:
a. Remove the protective coating from each adhesive strip located on the back of the rack-mounting
template. Lightly press the template into position on the rack. Ensure that both the left and right
sides are at the corresponding EIA locations.
Note: The tabs on each side of the template show a notch to indicate the correct spacing between
the front flanges.
b.
Locate the dots that are printed on the left and right side of the template. Place a self-adhesive dot
directly across from the template's printed dots on or near the rack's EIA numbering strip. You
will be using these dots to aid in correctly positioning the rail-alignment pins located on the front
of each rail.
c. Remove the rack-mounting template from the front of the rack. The front of your rack should now
contain dots.
d. Mount the rack-mounting template to the rack's back EIA frame. Place the rack-mounting template
at the same EIA-numbered location that was used on the front of the rack.
e. Wrap a self-adhesive dot directly across from the template's printed dots. Ensure that a portion of
the self-adhesive dot wraps around the rack frame so that it can be seen from the front of the rack.
f. Remove the rack-mounting template from the back of the rack. The back of your rack should now
contain dots that have been partially wrapped around the frame.
Marking the location without a rack-mounting template
You might need to mark the location without using a rack-mounting template. Follow these steps to
perform this task.
To mark the installation location and install the nut clips into a rack without a rack-mounting template,
complete the following steps:
1. Determine where in the rack to place the system. Install units in the lower part of the rack first. Place
larger and heavier units in the lower part of the rack. Record the EIA location.
Note: The 5886 expansion unit is two Electronic Industries Alliance (EIA) units high. An EIA unit is
1.75 in. (44.50 mm) in height. The rack contains three mounting holes for each EIA unit of height. This
system unit therefore is 3.5 in. (89 mm) high and covers 6 mounting holes in the rack.
2. Facing the front of the rack and working from the right side, place a self-adhesive dot next to the
middle hole of the bottom EIA unit
(A) in Figure 68 on page 72.
Figure 67. EIA units
Chapter 3. Installing a system or expansion unit into a rack
71