1992-02-01

Development of an On-Board Class A Local Area Network System 920229

The growing number of electronic components used in automobiles lately has given rise to problems concerning the increasing number, size and weight of the wiring harnesses. As one approach to resolving these problems, the authors proposed a multiplex method based on the direction of signal flow in 1988 (SAE880589). However, the need to reduce the number of wiring harnesses circuits further made it necessary to develop a more sophisticated system. This paper presents an on-board Class A local area network (LAN) system that overcomes the problems in conventional multiplexing systems through the use of a master-slave configuration, a polling selection method and a system that integrates of electronic circuits with switch modules.

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