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SAE J1850 (DEC2022)

Current Revision

Class B Data Communications Network Interface

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This SAE Standard establishes the requirements for a Class B Data Communication Network Interface applicable to all On-and OffRoad Land-Based Vehicles. It defines a minimum set of data communication requirements such that the resulting network is cost effective for simple applications and flexible enough to use in complex applications. Taken in total, the requirements contained in this document specify a data communications network that satisfies the needs of automotive manufacturers. This specification describes two specific implementations of the network, based on media/Physical Layer differences. One Physical Layer is optimized for a data rate of 10.4 Kbps while the other Physical Layer is optimized for a data rate of 41.6 Kbps (see Appendix A for a checklist of application-specific features). The Physical Layer parameters are specified as they would be detected on the network media, not within any particular module or integrated circuit implementation. Although devices may be constructed that can be configured to operate in either of the two primary implementations defined herein, it is expected that most manufacturers will focus specifically on either the 10.4 Kbps implementation or the 41.6 Kbps implementation depending on their specific application and corporate philosophy toward network usage. However, low-volume users of network-interface devices are expected to find it more effective to use a generic interface capable of handling either of the primary implementations specified in this document. This SAE document is under the control and maintenance of the Vehicle Networks for Multiplexing and Data Communications (Multiplex) Committee. This committee will periodically review and update this document as needs dictate.

SDO SAE: SAE International
Document Number J1850
Publication Date Dec. 20, 2022
Language en - English
Page Count 54
Revision Level 202212
Supercedes
Committee
Publish Date Document Id Type View
Dec. 20, 2022 J1850_202212 Revision
Oct. 14, 2015 J1850_201510 Revision
June 7, 2006 J1850_200606 Revision
May 30, 2001 J1850_200105 Revision
Nov. 1, 1996 J1850_199611 Revision
July 1, 1995 J1850_199507 Revision
May 1, 1994 J1850_199405 Revision
Feb. 1, 1994 J1850_199402 Revision
Aug. 1, 1991 J1850_199108 Revision
July 1, 1990 J1850_199007 Revision
Nov. 1, 1988 J1850_198811 Revision