Most modern electronic engines have a digital interface called J1939. Maretron’s J2K100 is a gateway that converts the J1939 protocol to marine industry standard digital protocol called NMEA 2000. The J2K100 converts many engine parameters including RPM, boost and oil pressure, oil and coolant temperature, voltage, fuel rate, engine hours and more depending on the particular engine. The GPS antenna/receiver (GPS200) provides the vessel’s speed that allows the display to compute and show the fuel economy (gallons/hour or liters/kilometer).
The following table shows the products included within this example system plus a list of the information or data available for display.
| Product | Description | Available Data List |
| DSM250 | Display | 5.7” Display shows data in this list, monitors the data and sounds an internal buzzer if there is a problem |
| J2K100 | Port Engine | Monitors RPM, boost and oil pressure, oil and coolant temp, voltage, fuel rate, hours, and more depending on the particular engine |
| J2K100 | Starboard Engine | Monitors RPM, boost and oil pressure, oil and coolant temp, voltage, fuel rate, hours, and more depending on the particular engine |
| GPS200 | Cabin Top GPS | Position, speed over ground, course over ground, time, date, magnetic variation and more |
This file requires Maretrons free NMEA 2000® network design tool N2KBuilder® to be installed on your PC.
The following screenshots are examples of how the engine status will be displayed on the DSM250.
COG Course Up Rose
Engine Battery
Engine Coolant and Oil
Engine Fuel Economy
Engine Fuel Rate
Engine Hours
Engine Pressures and Load
Engine Tachometer Gauge
GPS Status
Lat Lon
Local Time and Date
Moon
SOG and COG Digital
SOG Gauge
UTC Time and Date
Variation
