This SAE Recommended Practice document defines a recommended practice for implementing a bidirectional, serial communication link among modules containing microcomputers. This document defines those parameters of the serial link that relate primarily to hardware and basic software compatibility such as interface requirements, system protocol, and message format. The actual data to be transmitted by particular modules, which is an important aspect of communications compatibility, is not specified in this document. These and other details of communications link implementation and use should be specified in the separate application documents referenced in Section 2.
Save money while getting up-to-date access to the standards you need! Subscribe to the SAE J1939 Standards Collection on the Web and get one year of anytime access and automatic updates to the J1939 family of documents, plus all cross-referenced and selected related documents.