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J1939 to NMEA 2000® Bridge

Maretron’s J2K100 attaches directly into J1939 networks of compatible engines, transmissions, and gensets and converts the J1939 engine data to the NMEA 2000® marine digital interface. Critical engine, transmission, and genset data is then distributed throughout the vessel over a single cable where it can be monitored by any NMEA 2000® compatible display. All the information you need is available anywhere and everywhere you need it. The J2K100 only listens to the J1939 network and draws no power from it (power is derived from the NMEA 2000® interface). The J2K100 does not transmit any information over the J1939 network so it will not interfere with existing engine control or status data in any way. The J2K100 can also be used as part of a complete fuel computer. Simply connect the J2K100 together with the Maretron universal display (DSM250) and GPS antenna/ receiver (GPS100) and you have a system capable of displaying gallons per hour and/or miles per gallon. The J2K100 is compatible with any engine, transmission, or genset equipped with a J1939 interface.


Converts the following:

  • AC Generator Current
  • AC Generator Frequency
  • AC Generator Voltage
  • Tachometer
  • Engine Hours
  • Coolant Pressure
  • Coolant Water Temperature
  • Engine Oil Pressure
  • Engine Oil Temperature
  • Boost Pressure
  • Fuel Rate Monitoring
  • Charging Voltage
  • Percent Engine Load
  • Percent Engine Torque
  • Rated Engine Speed
  • VIN
  • Software ID
  • Transmission Gear
  • Transmission Oil Pressure
  • Transmission Oil Temperature

The J2K100 is compatible with J1939 products, including those from:

  • Caterpillar
  • Cummins
  • Detroit Diesel
  • John Deere
  • Kohler
  • Onan
  • Perkins
  • Steyr
  • Volvo Penta
  • Yanmar

Available Accessories:

  • MCF-2M-D4 J2K100 adapter Micro female to Deutsch 4 Pin 2 Meter Cordset
  • MCF-2M-D12 J2K100 adapter Micro female to Deutsch 12 Pin 2 Meter Cordset
  • MCF-2M-D12CAT J2K100 adapter Micro female to Deutsch 12 Pin 2 T cable


  • Operating Voltage: 9 to 16 Volts (DC Voltage)
  • Power Consumption: <150mA (Average Current Drain)
  • Load Equivalence Number (LEN): 3 (NMEA 2000® Spec. [1LEN = 50 mA])
  • Reverse Battery Protection: Yes (Indefinitely)
  • Load Dump Protection: Yes (Energy Rated per SAE J1113)


Brand: Maretron Comm Method: J1939/NMEA 2000® Connector: NMEA2000® Micro Country of Origin: USA Exterior Color: Black Exterior Color: Black


J2K100-brochure J2K100-installation Maretron-2020-catalog

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