Transcription of An Introduction to NMEA 2000
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An Introduction to NMEA 2000
1 March 2, 1999 NMEA 2000 Explained - The Latest Word Frank Cassidy - Chairman, NMEA standards Committee Preview: Over the past two years a number of articles and committee reports have appeared in this magazine describing the to and from as the NMEA 2000 network standard was being developed by the NMEA standards Committee Working Group 2000. An Introduction to NMEA 2000 in the May/June 1997 issue provided an overview of the network specification and described the development process. Key to NMEA 2000 is an integrated circuit implementation of a network access protocol commonly known as CAN. The September/October 1997 issue described the features of CAN in the article NMEA 2000 & the Controller Area Network. Having selected CAN as a building block for NMEA 2000 it was possible to define the requirements of the physical layer that interconnects the nodes in an NMEA 2000 network.
At the basic level, and in wide use today, NMEA 0183 (IEC 61162-1) provides serial- ... The standard defines all of the pertinent layers of the International Standards Organization Open Systems Interconnect (ISO/OSI) model, from the Application Layer ... Of interest is the maximum wire-length of the network, now set at ...
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