04790762 is referenced by 95 patents and cites 8 patents.

A modular programmable controller having an expansible backplane formed of a plurality of structually and electrically connectable backplane units, each comprising a housing having at least a pair of side walls, corresponding edges of which define a seating surface against which an input/output module may be secured. Between the side walls are located field wiring and control bus connectors which allow plug in and removal of a module without disturbing the field wiring or control bus. The control bus segment in a backplane unit comprises an edge card receiving connector in one side wall connected to a card with conductors protruding from the other side wall, the card also being connected to a control bus connector for the module.

Title
Backplane for a modularly expandable programmable controller
Application Number
758192
Publication Number
4790762
Application Date
August 4, 1987
Publication Date
December 13, 1988
Inventor
Richard L Rowe
Warren
IL, US
Thomas A Flether
Freeport
IL, US
Joan Harms heir
Brillion
WI, US
Clarence Harms heir
Brillion
WI, US
David S Harms deceased
late of Freeport
IL, US
Agent
Charles L Rubow
Assignee
Honeywell
MN, US
IPC
H05K 1/00
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