ISO 11992: Communication Standard for Trailers

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ISO 11992 is a communication protocol developed for data exchange between trucks and trailers, based on CAN (Controller Area Network) technology. This standard enables reliable and secure communication, particularly for monitoring brake systems, lights, ABS, and other electronic trailer modules.

How ISO 11992 Works

ISO 11992 uses a CAN bus adapted for transport systems. The data transmission speed is typically 125 kb/s or 250 kb/s, depending on the configuration. The protocol allows the tractor and trailer to share critical information in real time, enhancing safety and optimizing vehicle performance in transport operations.

Launch OBD-II adapters that support the protocol:

DBScar IV, DBScar V, DBScar VII

ThinkDiag devices that support the protocol:

ThinkDiag 2

Ediag devices that support the protocol:

Ediag Plus, Ediag Elite

Vehicle types and brands supported by the protocol:

Heavy-duty commercial vehicles and trailers, primarily Volvo Trucks, Scania, MAN, Mercedes-Benz Trucks, DAF, Iveco, Freightliner, as well as buses and construction trailers.

ISO 11992 is used for communication between the tractor and trailer, enabling diagnostics and control of electrical and braking systems.

Advantages of ISO 11992

  • Reliable communication between truck and trailer
  • Enables real-time diagnostics and system monitoring
  • Standardized and widely accepted in the transport industry
  • Reduces the risk of errors in trailer electronic systems
  • Supports complex functions such as braking, lighting, and trailer stability

Disadvantages and Limitations

  • Applicable only to heavy-duty trucks and trailers
  • Requires specialized diagnostic tools
  • Limited data rate compared to modern protocols (e.g., CAN FD or DoIP)
  • Compatibility with new electric and hybrid transport systems may require additional configuration

Applications of ISO 11992

ISO 11992 is used for monitoring trailer performance, diagnosing brakes, overseeing lights, and ensuring safety systems in truck fleets and the transport industry. This protocol is crucial for optimizing vehicle operations and improving road safety.

Conclusion

ISO 11992 provides a standardized solution for communication between trucks and trailers. Its reliability and real-time diagnostic capabilities make it indispensable in the transport and logistics industry, ensuring both safety and operational efficiency.