* 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:
%20lo-res.png) | Adapter Micro female to Deutsche 4 Pin 2 M Cordset Part Number: MCF-2M-D4 Note: Typically used with Steyr Engines |
%20lo-res.png) | Adapter Micro female to Deutsche 12 Pin 2 M Cordset Part Number: MCF-2M-D12 Note: Typically used with Onan Generators |
%20lo-res.png) | 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
J2K100 - Software Revision History
Note: Maretron monitoring sensors are updated using Maretron’s N2KAnalyzer application on a PC paired with an approved NMEA 2000® gateway.
2.4.2.1 (2024-05-08) – Current Release (HW 2.0)
- Support SPN selection for 127493 Transmission oil pressure. (SPN 123 and SPN 127)
2.4.1.10 (2022-02-22) (Not Released)
- Sends ISO request for 65259 using Global ISO Request instead of using specific destination address. ress.
2.4.1.9 (2021-11-29) (Not Released)
- Correctly parsing PGN 64946 and 64976.
2.4.1.8 (2021-10-22) (Not Released)
- Change field #9 of 130850 from Engine Serial Number to all data payload of 65259.
- Transmit request for all data from J1939 side on unit reset
2.4.1.7 (2021-08-09) (Not Released)
- Change default J1939 node address to 0xF2.
- Add programmable filed for storing the J1939 node address in EEPROM
(The address can be changed and stored to EEPROM with special test mode command)
2.4.1.6 (2021-06-18) (Not Released)
- Support Siren Marine Mode (with SM appended to the SW version when SM feature enabled)
2.3.1.4 (2019-02)
- Support CAN Frame Forwarding PGN (130841)
- Support Electronic Transmission Controller 1 PGN (61442) forwarding (4028)
- Support Heartbeat PGN (126993)
- Change NMEA Certification Level to 2
1.2.1.1 & 2.2.1.1 (2015-03) – Current Release (HW 1.0)
- Corrected a problem with not sending a Check Engine engine warning indicator when receiving J1939 DM1 messages sent by CAI TMT7839 J1708/J1939 converter (3368)
1.2.0.3 & 2.2.03 (2015-01)
- Now translates DM1 fault messages from Canadian Instruments TMT7839 to equivalent NMEA 2000 engine and transmission warning flags
- Now translates DM1 fault messages to equivalent NMEA 2000 engine and transmission warning flags
2.1.1.1 (2013-8-29
- Added the ability for the J2K100 to periodically request the 65266 Engine Hours parameter group from the monitored engine. This allows the display of Engine Hours on NMEA 2000 networks for engines which require the 65266 Engine Hours parameter group to be requested from the engine. This parameter is disabled by default, and may be enabled using a DSM150 or DSM250 display or the N2KAnalyzer software (using the DSM250 emulator).
1.0.13.2 (2011-10-25)
- Corrects an issue with controlling multiple Dometic Icemakers/AC's on an NMEA 2000 network.
1.0.11 (2010-11-18)
- Add programmable damping for Engine Speed.
- Add programmable damping for Fuel Rate.
1.0.10 (2010-08-17)
- Improvements to manufacturing.
1.0.9 (2010-03-18)
- Added support for use as a gateway for a Dometic (Marine Air Elite and CruiseAir Q-Logic)Air Conditioner or a Dometic (Eskimo) Icemaker.
1.0.7 (2009-03-04)
- Added support for labeling so that the device can easily be identified with a user-programmable string.
- Added ability to configure transmission periods for periodic PGN's
