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  1. I know the J2K100 receives messages from the J1939 network and subsequently transmits them over the NMEA 2000 network, but does the J2K100 transmit any messages on the J1939 network? By default, the J2K100 transmits no messages onto the J1939 network. As shipped from the factory, the J2K100 only listens for J1939 messages and creates no bus traffic on the J1939 network. The J2K100 does however acknowledge received messages, which... Read More
  2. How is J1939 different from NMEA 2000? J1939 and NMEA 2000 networks are both based on the same hardware (Controller Area Network (CAN)), and both protocols use the same message format (the messages are actually compatible and can coexist on the same network), however, NMEA uses different ... Read More
  3. Is J1939 similar to NMEA 2000 in that the J1939 network requires terminators? Yes, J1939 and NMEA 2000 both use CAN technology where network topology requires terminators on both ends of the trunk or backbone. Please refer to the application note entitled, "Interfacing J1939 Engines and/or Gensets to an NMEA 2000® Network Usin... Read More
  4. What information does the J2K100 provide over the NMEA 2000 network? As long as the engine or generator is providing the appropriate information via the J1939 interface, the J2K100 is capable of producing the following NMEA 2000 information:engine speed (tachometer)engine boost pressureengine oil pressureengine oil te... Read More
  5. I see that Maretron’s DSM150, DSM200, and DSM250 displays have a J2K100 configuration setting called "NMEA 2000 Engine Instance:"; what is this? Maretron's DSM150, DSM200, and DSM250 displays have a J2K100 configuration setting called "NMEA 2000 Engine Instance:" which is used to program the J2K100 to transmit the appropriate NMEA 2000 instance. For example, if the J2K100 is connected to... Read More
  6. How do I set the J2K100 configuration setting called "NMEA 2000 Engine Instance:" using Maretron’s DSM150 or DSM250 display? You set the J2K100 configuration setting called "NMEA 2000 Engine Instance:" using Maretron's DSM150, DSM200, or DSM250 display in the following way. Enter menu mode, scroll to "Configuration?" and press enter. Scroll to "Device Configuration?" and p... Read More
  7. I see that Maretron’s DSM150, DSM200, and DSM250 displays have a J2K100 configuration setting called "NMEA 2000 Transmission Instance:"; what is this? Maretron's DSM150, DSM200, and DSM250 displays have a J2K100 configuration setting called "NMEA 2000 Transmission Instance:" which is used to program the J2K100 to transmit the appropriate NMEA 2000 instance. For example, if the J2K100 is connec... Read More
  8. How do I set the J2K100 configuration setting called "NMEA 2000 Transmission Instance:" using Maretron’s DSM150 or DSM250 display? You set the J2K100 configuration setting called "NMEA 2000 Transmission Instance:" using Maretron's DSM150, DSM200, or DSM250 display in the following way. Enter menu mode, scroll to "Configuration?" and press enter. Scroll to "Device Configuration?"... Read More
  9. I see that Maretron’s DSM150, DSM200, and DSM250 displays have a J2K100 configuration setting called "NMEA 2000 PGN Enable/Disable..."; what is this? Maretron's DSM150, DSM200,and DSM250 displays have a J2K100 configuration setting called "NMEA 2000 PGN Enable/Disable?" which is used to turn on and off specific messages that are transmitted by the J2K100.... Read More
  10. Is it possible to turn on or off J2K100 NMEA 2000 transmitted messages (or PGNs)? Yes, it is possible to turn on and off the J2K100 transmitted messages (or PGNs) using Maretron's DSM150, DSM200, or DSM250 display. On the display, enter menu mode, scroll to "Configuration?" and press enter. Scroll to "Device Configuration?" and pr... Read More
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