Remote I/O - J1939

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J1939/Modbus RTU Slave Gateway

The GW-7228 is a solution that provides a protocol conversion between J1939 and Modbus RTU. For J1939 network, the GW-7228 supports PDU1, PDU2, broadcast and destination specific type of J1939 messages. From the view of Modbus RTU network, the GW-7228 is a Modbus RTU slave to reply the request from Modbus RTU master. We provide Utility software for users to configure the parameters of J1939 / Modbus RTU of the GW-7228. The application fields can be Diesel power-train applications, In-Vehicle networks for trucks and buses, etc.

The following figure shows the application architecture for the GW-7228


  • Provide PWR / J1939 / MODBUS indication LED
  • Built-in jumper to select 120 ohm terminal resister
  • Watchdog inside

J1939 Features

  • 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)
  • Supported BAM of Connection Management Message
  • Network addresses management

Modbus RTU Features

  • Support RS-232, RS-485 and RS-422
  • interfacesSupported Modbus RTU slave protocol
  • Configurable for Modbus Network ID(1~250)
  • Configurable baud rates of 2400, 4800, 9600, 19200, 38400, 57600, 115200 bps
  • Configurable for no, odd, or even parity and 1 or 2 stop bits
  • Support Function Code 03 / 04 / 06 / 16 of Modbus functions for reading and writing J1939 Messages

Ordering Information

GW-7228:  J1939/Modbus RTU Slave Gateway included CA-0910 cable

1 Serial PortIsolated I/O PortsModbus RTU ProtocolRS422 RS485 InterfaceRS485 Serial Port-25C to 75C Operating3KV ESD ProtectionDIN Rail MountJ1939 Product Group10V to 30VDC Power

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