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J1939 to NMEA 2000® gateway

* J2K100 may require configuration depending on application, see User Manual (Maretron DSM570, DSM410, USB100, or IPG100 needed to configure)

Link to knowledge base and frequently asked questions

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 (DSM570) or DSM410 and GPS antenna/receiver (GPS200) and you have a system capable of displaying gallons per hour and/or miles per gallon.

  • 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

The following accessories are available for the J2K100:

Adapter Micro female to Deutsche 4 Pin 2 M Cordset

Part Number: MCF-2M-D4

Adapter Micro female to Deutsche 12 Pin 2 M Cordset

Part Number: MCF-2M-D12

Adapter Micro female to Deutsche 12 Pin 2 T Cable

Part Number: MCF-2M-D12CAT


The MCF-2M-D12CAT cable is designed to allow the J2K100 to have a parallel J1939 connection to the Caterpillar MPD display ONLY. Compatibility with other engine makes not supported.

Application note: Interface Cable for Caterpillar Engines

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