J1939 to Modbus TCP Server / RTU Slave Gateway



  • Built-in jumper to select 120 ohm terminal resistor
  • Watchdog inside
  • Transmission and reception of all types of J1939 messages, including PDU1, PDU2, broadcast and destination specific
  • J1939 Transport Protocol for transmission and reception of large messages (9 – 1785 bytes)
  • Supports BAM of Connection Management Message
  • Network addresses management
  • Supports Modbus TCP server / RTU slave protoco


J1939 is the vehicle bus standard used for communication and diagnostics among vehicle components, originally by the car and heavy duty truck industry in the United States. Because of the success of applying in vehicles, J1939 has become the accepted industry standard and the vehicle network technology of choice for off-highway machines in applications such as construction, material handling, and forestry machines. It is a higher-layer protocol based on Controller Area Network (CAN), which provides serial data communications between microprocessor systems (ECU) in any kind of heavy duty vehicles. The messages exchanged between these units can be data such as vehicle road speed, torque control message from the transmission to the engine, oil temperature, and many more.

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