Aligning and connecting modules
Aligning the modules ensures that the accessor can move freely between the modules.
About this task
Skip this step if the library does not have Expansion Modules.
Aligning the modules ensures that the accessor can move freely between the modules. The library
cannot operate unless the alignment mechanisms of the upper modules are in the locked position, and
the alignment mechanism of the lowest module is unlocked.
- From the front of the library, loosen the screws on each of the modules where they are attached to the rails two full turns.
- From the back of the library, starting with the bottom pair of modules, align each module with
the module below it. Repeat for each pair of modules. Refer to Figure 3.
- Move the alignment lever of the upper of the pair of modules to the locked or engaged position.
If you encounter resistance, adjust the position of the upper module so the pin in the alignment
mechanism moves into the mating hole in the lower module. If you still encounter
resistance, check to see if the rack rails are installed correctly. Check that the hole for the
alignment pin is on the left rail (looking from the front) toward the back of the rack. See
1 in Figure 1.
Figure 1. Hole for alignment pin 
Note: If a blue alignment lever lock is attached to the rear of the module, slide it to the left, then move the alignment lever. The lever lock has an internal spring, so hold it while the alignment lever is moved, and it automatically springs back into place after the lever is moved. See Figure 2.Figure 2. Alignment lever lock 
Figure 3. Alignment lever locked or engaged to lower module 
Figure 4. Alignment lever unlocked or disengaged 
- Move the alignment lever of the upper of the pair of modules to the locked or engaged position.
If you encounter resistance, adjust the position of the upper module so the pin in the alignment
mechanism moves into the mating hole in the lower module. If you still encounter
resistance, check to see if the rack rails are installed correctly. Check that the hole for the
alignment pin is on the left rail (looking from the front) toward the back of the rack. See
1 in Figure 1.
- Verify that the lowest module in the library has its alignment lever is in the unlocked or
disengaged position.
Figure 5. Two modules in rack, seen from the rear 
1 Locked 2 Unlocked - From the front of the library, tighten the Philips screws on each of the modules to secure the modules to the rack.
- From the back of the library, connect the modules of each pair to its
adjacent module by using the expansion interconnect cables ( 1 ) as shown
in Figure 6.Note: The top module's top connector and the bottom module's bottom connector has nothing plugged into them.
