Emerson 721NPBB - page 27

User Instructions UM582127000
Spec. No. 582127000 (Model 721NPBB) Issue AC, January 2, 2013
Chapter 3. Maintenance Page 19
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Figure 3-4
Installing a Field Expansion Module Mounting Shelf Spec. No. 588705300
1.Remove busbar rear shield from
existingrectifier/converter shelves.
Removethe cut-out panel
fromthe busbar rear shield.
2.Remove hardware from the
lowestmodule mounting shelf’s
-48V,return, and +24V (if present)
busbars.
3.Install the expansion module
mountingshelf into the rack.
4. Remove busbar rear shield from
expansionmodule mounting shelf.
5.Install the busbars provided
withthe expansion module
mountingshelf between the
shelves.Torque to 60 in-lbs.
6.Re-install the rear busbar
shieldspreviously removed.
Front
Rear
BusbarRear Shield
Cut-OutPanel
Rear