First J1939 Product Guide Launched

CAN in Automation simplifies search for J1939-based devices

CAN in Automation (CiA) GmbH has launched the first Product Guide for J1939-based devices and services on the group's web site (www.can-cia.org/products/j1939pg06) and on CD-ROM. The guide lists products conforming to several J1939-based higher-layer protocols (SAE J1939-71, ISO 11992, ISO 11783, and NMEA 2000).

The aim of the product guide is to simplify the search for J1939-based devices. J1939-based higher layer protocols are commonly used in on-highway and off-highway vehicles for in-vehicle networking (SAE J1939-71) and for truck/trailer communication (ISO 11992). Other application fields include marine navigation systems (NMEA 2000) as well as agriculture and forestry machines (ISO 11783, also known as Isobus).

“We were amazed to learn that there has not been any kind of catalog of J1939 devices and services, considering how heavily this set of protocols is used”, says Holger Zeltwanger, CEO of CiA GmbH. “We were approached by our North-American members who were looking for a single information source such as the CANopen Product Guide. It really seems to work for purchasers, too – in 2005 alone our web page requests for the CANopen Product Guide increased by 27% compared to 2004.” The company is expecting to make the J1939 Product Guide as much of a landmark as the CANopen Product Guide has become. Detailed product information, convenience of listing by product type, by manufacturer, by name and by industry group (e.g. On Highway, Agricultural and Forestry Equipment, Construction Equipment) enable users to find and compare products in one location. Technical information about physical layer and application layer compliance provides the basis for informed decisions.

Background information J1939:

In the early Nineties, the SAE (Society of Automotive Engineers) Truck and Bus Control and Communications Sub-committee started the development of a CAN-based application profile for in-vehicle communication in trucks. In 1998 the SAE published the J1939 set of specifications supporting SAE class A, B, and C communication functions. A J1939 network connects electronic control units (ECU) within a truck and trailer system. The J1939 specification - with its engine, transmission, and brake message definitions - is dedicated to diesel engine applications.

Other industries adopted the general J1939 communication functions, in particular the J1939/21 and J1939/31 protocol definitions - they are required for any J1939-compatible system. They added other physical layers and they defined other application parameters. The ISO standardized the J1939-based truck and trailer communication (ISO 11992) and the J1939-based communication for agriculture and forestry vehicles (ISO 11783). The NMEA specified the J1939-based communication for navigation systems in marine applications (NMEA 2000).

CAN in Automation (CiA) hosts seminars and national as well as international CAN conferences worldwide. The company publishes the CAN Newsletter and digital product guides. CiA develops and markets the conformance test system for CANopen devices; the company also offers the CANopen Safety Chip CSC01.CAN in Automation (CiA) hosts seminars and national as well as international CAN conferences worldwide. The company publishes the CAN Newsletter and digital product guides. CiA develops and markets the conformance test system for CANopen devices; the company also offers the CANopen Safety Chip CSC01. For more information visit www.can-cia.org