Abstract: An electronic equipment drawer 20 is aligned with an electrical connector in a tunnel in the horizontal and vertical directions with alignment pins and holes. A screw drive 34 and cam 36 mounted on the drawer engages a tunnel wall and controls insertion into the tunnel to provide proper electrical contact and lock the drawer in place in the tunnel. A bus extender card 25 inserted in a connector 26 centrally located on a mother board 21 is supported by surfaces on a bar 28 extending between end walls 24 of the drawer. The end walls 24 include pairs of channels 31 on opposed walls which support feature cards inserted into connectors mounted on the bus extender card 25.

Abstract: An electronic equipment drawer is aligned with an electrical connector in a tunnel in the horizontal and vertical directions with alignment pins and holes. A screw drive and cam mounted on the drawer engages a surface of an opening in a wall of the tunnel and controls insertion into the tunnel to provide proper electrical contact and lock the drawer in place in the tunnel. Within the drawer a bus extender card inserted in a connector centrally located on a mother board is supported by surfaces on a bar extending between end walls of the drawer. The end walls include pairs of channels on opposed walls which support feature cards inserted into connectors mounted on the bus extender card.

Abstract: A methodology for packaging and grounding electronic devices including distributive data processing systems wherein a Main Processing Unit (MPU) and power supply are packaged within a common housing. The MPU and other electrical components are placed on a common support card or substrate. The substrate is provided with plugs for mating with the power supply and I/O connectors for mating with devices which may be remotely attached thereto. Each connector is fitted with a shielded receptacle that coacts with the common housing to provide EMC shielding for the MPU and other electrical components. The packaging is such that an untrained person may replace the card without compromising the integrity of the EMC shield.