Installing and Removing VME Option Boards3-5014–001867This upgrade kit consists of two metal strips that attach to the sides of the card cageas shown in Figure 3–6. These strips provide EMI shielding and, in conjunction withair dams on the controller boards, maintain proper cooling pressure within the cardcage. New VME controller boards and the replacement spares for your existingboards 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 cagecan cause boards to short out and be damaged. See Figure 3–7 forallowed and disallowed configurations. Also, if in the same card cageyou mix a controller having the old air dam along with a controllerhaving the new air dam, you must install only the stick–on metal stripof 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 carethat the strip is oriented as shown in the illustration (the adhesive patch at thebottom 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 angledstrip (with EMI clips) from the update kit as shown in Figure 3–6. The stripattaches to the card cage with two screws and associated washers.Card cageStick–on metalstrip (right side)Screw–on metalstrip (left side)Screws and washersComputer Unit Rear ViewAdhesive patchmust be at bottomEMI clipsFigure 3–6 EMI/Air Dam Upgrade Kit Installed on an AViiON VME Card Cage
