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Browse Prior Art Database

Packaging of Printed Circuit Cards

IP.com Disclosure Number: IPCOM000114882D
Original Publication Date: 1995-Feb-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 84K

Publishing Venue

IBM

Related People

Dimmick, RF: AUTHOR [+5]

Abstract

Described is the mechanical packaging provided to replace the rear Direct Access Storage Device (DASD) drawer in the storage expansion unit of a Control Electronics Complex (CEC) with a drawer which provides capability to hold Peripheral Component Interconnect (PCI) cards. The DASD drawer and the PCI drawer must be interchangeable, although there is no requirement that the two drawers provide the same characteristics such as concurrent maintenance of their contents or docking to the storage expansion unit connectors. The PCI drawer must be capable of connecting to half or all of the eight DASD in the front of the storage expansion unit.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Packaging of Printed Circuit Cards

      Described is the mechanical packaging provided to replace the
rear Direct Access Storage Device (DASD) drawer in the storage
expansion unit of a Control Electronics Complex (CEC) with a drawer
which provides capability to hold Peripheral Component Interconnect
(PCI) cards.  The DASD drawer and the PCI drawer must be
interchangeable, although there is no requirement that the two
drawers provide the same characteristics such as concurrent
maintenance of their contents or docking to the storage expansion
unit connectors.  The PCI drawer must be capable of connecting to
half
or all of the eight DASD in the front of the storage expansion unit.

      Fig. 1 shows the PCI Card drawer 6 extended out from the
Storage Expansion Unit.  The drawer is mounted to the storage
expansion unit with slides 8 which lock in the extended position for
ease of maintenance.  The drawer can contain up to eight PCI form
factor cards, and a bridge card.  The drawer must contain a 120-watt
regulator card 9 which connects (docks) to the storage expansion
units source of +29 volts.  (The same power source used by the eight
DASD devices which could also use this space).  The PCI bridge card 5
splits the input PCI bus into two separate PCI busses each containing
a maximum of four PCI cards.  The two busses are contained on a
backplane (not shown) which, in addition to containing the busses,
also distributes power at the PCI voltage levels from the regulator
card 9 to each of the eight cards which plug into it.  There is a
stiffener (also not shown) behind the backplane which accepts the
plugging forces when the PCI cards are being plugged.  T...