Data General AViiON 5000 Series, Customer Documentation

Page: 91 / 210

Installing and Removing VME Option Boards
3-5
014–001867
This upgrade kit consists of two metal strips that attach to the sides of the card cage
as shown in Figure 3–6. These strips provide EMI shielding and, in conjunction with
air dams on the controller boards, maintain proper cooling pressure within the card
cage. New VME controller boards and the replacement spares for your existing
boards have the new air dams that work with the EMI/Air Dam Upgrade.
CAUTION: An improper arrangement of old and new boards within a card cage
can cause boards to short out and be damaged. See Figure 3–7 for
allowed and disallowed configurations. Also, if in the same card cage
you mix a controller having the old air dam along with a controller
having the new air dam, you must install only the stick–on metal strip
of the EMI/Air Dam Upgrade kit shown in Figure 3–6.
Install the upgrade kit as follows:
1. Install the metal strip with adhesive patches as shown in Figure 3–6. Take care
that the strip is oriented as shown in the illustration (the adhesive patch at the
bottom of the strip must be aligned with the bottom of the card cage).
2. If both of the VME controller boards have the new air dams, install the angled
strip (with EMI clips) from the update kit as shown in Figure 3–6. The strip
attaches to the card cage with two screws and associated washers.
Card cage
Stick–on metal
strip (right side)
Screw–on metal
strip (left side)
Screws and washers
Computer Unit Rear View
Adhesive patch
must be at bottom
EMI clips
Figure 3–6 EMI/Air Dam Upgrade Kit Installed on an AViiON VME Card Cage