Chapter 12 Installing, Removing, and Replacing
Replacing the Control Module
Scalar i500 User’s Guide 388
Place the control module on top of the expansion module and slide it
to the rear of the unit. A small notch on the bottom of the control
module aligns it with the top of the 9U expansion module.
6 Use rack ears to fasten the control module on top of a 9U expansion
module.
7 If you placed the control module on top of an expansion module,
secure the two modules by tightening the two thumbscrews at the
base of the front of the module and the two thumbscrews located at
the base of the back of the module. Then lower the module’s guide pin
(located at the base of the front of the module) by turning it and
pushing it down.
8 Stack all expansion modules (if any) in their original positions above
the control module. Use rack ears to fasten the modules to the
rack.Then tighten all thumbscrews located at the base of the front and
back of the modules.
9 Engage the Y-rails. Tighten the thumbscrews and lower the guide
pin. Doing this aligns the Y-rail with the Y-rail of the module beneath
it.
a From the front of the library, open the I/E station and access
doors of the control module. Squeeze the handle of the Y-rail
release mechanism, lift it out of its locked position, and slide it
downward as far as it will go.
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