Installing An Ioa Shelf - Juniper E120 - RELEASE 11.1.X HARDWARE GUIDE 3-25-2010 Hardware Manual

E120 and E320 11.1.x Hardware Guide
6.
CAUTION: If you meet strong resistance when attempting to seat the module using
the ejectors, remove it from the chassis and confirm that the slot is designed to hold
the module. Also, be sure that you have aligned the top and bottom edges in the
correct matching tracks.
7.
8.
NOTE: Tighten the captive screws completely before installing an adjacent module
so that proper EMI gasket compression occurs. Failure to do this can make it difficult
to install adjacent modules.
CAUTION: Do not overtighten the screws.

Installing an IOA Shelf

Use an IOA shelf (also called an IOA bracket) when installing half-height IOAs in the
router. IOA shelves screw into the midplane between the upper/right bay (Adapter
0) and lower/left bay (Adapter 1). For example, in an E320 router, IOAs in the upper
bay rest on the shelf, while IOAs in the lower bay use the guides on the bottom of
the shelf to remain vertical. See Figure 20 on page 40.
Figure 20: IOA Shelf
40
Installing an IOA Shelf
Slide the module into the chassis by placing it between the guides of the selected
slot and pushing the module until it stops.
The module stops sliding when the ejectors make contact with the front of the
chassis.
Insert the module into the backplane by simultaneously depressing both ejectors
(as shown in Figure 19 on page 39), exerting forward pressure on the module.
Tighten the module's captive screws using the No. 2 Phillips screwdriver.