Remote I/O - J1939

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J1939 to Modbus TCP Server / RTU Slave Gateway

The GW-7238D is a gateway that provides conversion between J1939 and Modbus TCP/RTU protocol. For J1939 network, the GW-7238D supports PDU1, PDU2, broadcast and destination specific type of J1939 messages. For Modbus TCP/RTU network, the GW-7238D is a Modbus TCP server / RTU slave to reply the request from Modbus TCP client / RTU master. Utility software is provided for users to configure J1939 and Modbus TCP/RTU setting in the GW-7238D. 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-7238D


Module specs

  • RoHS Design
  • Provide PWR / ERR / J1939 / MODBUS indication LEDs
  • The built-in jumper to select 120 ohm terminal resister of CAN bus
  • 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 Features

  • Support RS-232, RS-485 and Ethernet interfaces
  • Support Modbus TCP server / RTU slave protocol
  • Communication support both Modbus TCP / RTU to J1939 at the same time
  • Configurable UART baud rates of 9600, 19200, 38400, 57600, 115200 bps
  • Allow Max 5 Modbus TCP clients to access GW-7238D simultaneously
  • Support Function Code 03 / 04 / 06 / 16 of Modbus functions for reading and writing J1939 Messages

Ordering Information

GW-7238D:  J1939 to Modbus TCP Server / RTU Slave Gateway included CA-0910 cable

2 Serial PortsIsolated I/O PortsModbus RTU ProtocolModbus TCP ProtocolRS485 Serial Port-25C to 75C Operating3KV ESD ProtectionDIN Rail MountJ1939 Product Group10V to 30VDC Power

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