Chapter 12 Installing, Removing, and Replacing
Installing the Library in a Rack
Scalar i500 User’s Guide 437
Installing Additional
Modules Into the Rack 12
All modules that you add to the rack must be positioned above the
module that you previously installed, since the bottom module must be
secured to the rackmount shelves (unless you decide to uninstall the
entire library from the rack and reconfigure it).
Required parts: Rack ears, (4) M5 thumbscrews, (4) nut clips or (4) cage
nuts
Explanation of parts: Each rack ear contains two elongated holes, enabling
you to fasten it to the rack (using the M5 thumbscrews and either the nut
clips or cage nuts) using the most accessible mounting holes.
1 If you are installing a module above a module that currently has a top
cover, remove the top cover. Similarly, if the module you are
installing has a bottom cover, remove the bottom cover before
installing the module above another module in the rack. You need to
make sure the library is “hollow” all the way through with just one
bottom cover on the lowest module and one top cover on the top
module. See Installing the New 9U Expansion Module
on page 353.
2 Determine where in the rack to install the nut clips (or cage nuts).
a If you are adding a module above a previously racked expansion
module, count nine full units from the location of the expansion
module’s rack ears, and prepare to install the nut clip (or cage
nut) to that location on the rack.
For example, if the expansion module’s rack ears are located at
1U and 2U, then the nut clips (or cage nuts) should be installed at
10U and 11U.
Next, determine which holes you must use within the 10U and
11U markers. Notice that each rack unit (U), as delineated by the
alignment markers in the rack, contains three mounting holes. If
you are adding a module anywhere above the control module,
position the nut clip (or cage nut) at the middle hole in that unit.
If you are adding a module anywhere below the control module,
position the nut clip (or cage nut) at the upper hole in that unit.
Note: Consider using the following method to determine where
to install the nut clips (or cage nuts) rather than adding the
module to the rack first. If you add the module to the rack
first, installing the nut clips (or cage nuts) can be difficult
because rack space has become restricted.
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