®
J2K100
J1939 to NMEA 2000® Gateway
User’s Manual
Revision 1.0
Copyright © 2006 Maretron, LLC All Rights Reserved
Maretron, LLC
9034 N. 23rd Ave #13
Phoenix, AZ 85021-7850
Maretron Manual Part #: M001201
Revision 1.0
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Table of Contents
1
2
Introduction ........................................................................................................................1
1.1 Firmware Revision.................................................................................................... 1
1.2 J2K100 Features...................................................................................................... 1
1.3 Quick Install.............................................................................................................. 1
Installation..........................................................................................................................2
2.1 Unpacking the Box ................................................................................................... 2
2.2 Choosing a Mounting Location................................................................................. 2
2.3 Mounting the J2K100................................................................................................ 3
2.4 Connecting the J2K100 ............................................................................................ 4
2.4.1 Connecting the J2K100 NMEA 2000® Interface............................................. 4
2.4.2 Connecting the J2K100 J1939 Interface........................................................ 5
2.4.3 Checking Connections................................................................................... 5
2.5 Configuring the J2K100............................................................................................ 5
2.5.1 J1939 Source Address Selection................................................................... 6
2.5.2 NMEA 2000® Engine Instance Selection ....................................................... 6
2.5.3 NMEA 2000® Transmission Instance Selection ............................................. 6
2.5.4 J1939 Diagnostic Messages Enable/Disable................................................. 6
2.5.5 NMEA 2000® PGN Enable/Disable................................................................ 6
Maintenance ......................................................................................................................7
Troubleshooting .................................................................................................................8
Technical Specifications.....................................................................................................8
Technical Support ............................................................................................................10
Installation Template........................................................................................................11
Maretron (2 Year) Limited Warranty.................................................................................12
3
4
5
6
7
8
Table of Figures
Figure 1 – Mounting the J2K100................................................................................................ 3
Figure 3 – J2K100 Electrical Connections................................................................................. 4
Figure 4 – NMEA 2000® Connector Face Views ....................................................................... 5
Figure 6 – Mounting Surface Template ................................................................................... 11
Table of Appendices
Appendix A – NMEA 2000® Interfacing Translations............................................................... A1
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1 Introduction
Congratulations on your purchase of the Maretron J1939 to NMEA 2000® Gateway (J2K100).
Maretron has designed and built your gateway to the highest standards for years of
dependable and accurate service.
Maretron’s J2K100 is a gateway for bridging J1939-equipped engines and gensets with an
NMEA 2000® network. The gateway automatically converts incoming J1939 messages to
NMEA 2000® messages so you can monitor your J1939-equipped engines, transmissions, or
gensets with networked NMEA 2000® displays such as the Maretron DSM200.
The Maretron J2K100 is designed to operate within the harsh demands of the marine
environment. However, no piece of marine electronic equipment can function properly unless
installed, configured, and maintained in the correct manner. Please read carefully and follow
these instructions for installation, configuration, and usage of the Maretron J2K100 in order to
ensure optimal performance.
1.1 Firmware Revision
This manual corresponds to J2K100 firmware revision 1.0.
1.2 J2K100 Features
The Maretron J2K100 has the following features.
• NMEA 2000® and J1939 Interfaces
• Waterproof Connectors
• Sealed Waterproof Enclosure
• Translates J1939 Engine and Transmission Messages to Equivalent NMEA 2000®
Messages
• Capable of Passing J1939 Diagnostic Messages
• Passes J1939 AC Generator Parameters through to the NMEA 2000® network
• J1939 Interface is Opto-Isolated from NMEA 2000® Eliminating Potential Ground Loops
• Obtains Power from NMEA 2000® Port (No power drawn from or data transmitted on
J1939 interface).
1.3 Quick Install
Installing the Maretron J2K100 gateway involves the following five steps. Please refer to the
individual sections for additional details.
1. Unpack the Box (Section 2.1)
2. Choose a Mounting Location (Section 2.2)
3. Mount the J2K100 (Section 2.3)
4. Connect the J2K100 (Section 2.4)
5. Configure the J2K100 - Optional, only required for specialized configurations (Section 2.5)
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2 Installation
2.1 Unpacking the Box
When unpacking the box containing the Maretron J2K100, you should find the following items:
1 – J2K100 - J1939 to NMEA 2000® Gateway
4 – Mounting Screws
1 – Female Micro Field-Attachable Connector (For connecting J1939 interface)
1 – J2K100 User’s Manual
1 – Warranty Registration Card
If any of these items are missing or damaged, please contact Maretron.
2.2 Choosing a Mounting Location
The J2K100 is mounted between the J1939 network and the NMEA 2000® network. Please
consider the following when choosing a mounting location.
1. The J2K100 is waterproof, so it can be mounted in a damp or dry location.
2. The orientation is not important, so the J2K100 can be mounted on a horizontal deck,
vertical bulkhead, or even upside down if desired.
3. The J2K100 is temperature rated to 55°C (130°F), so it should be mounted away from
engines or engine rooms where the operating temperature exceeds the specified limit.
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2.3 Mounting the J2K100
Attach the J2K100 securely to the vessel using the included brass mounting screws or other
fasteners as shown in Figure 1 below.
Figure 1 – Mounting the J2K100
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J2K100 User’s Manual
2.4 Connecting the J2K100
The J2K100 requires two electrical connections as shown in Figure 2. Refer to Section 2.4.1
for making the NMEA 2000® connection and Section 2.4.2 for making the J1939 connection.
Figure 2 – J2K100 Electrical Connections
2.4.1 Connecting the J2K100 NMEA 2000® Interface
Vertical text on the J2K100 label identifies the NMEA 2000® connector. With the label right
side up, the NMEA 2000® connector can be found on the right side of the enclosure. The
NMEA 2000® connector is a five pin male connector (see Figure 3). You connect the J2K100
to an NMEA 2000® network using a Maretron NMEA 2000® cable (or compatible cable) by
connecting the female end of the cable to the J2K100 (note the key on the male connector and
keyway on the female connector). Be sure the cable is connected securely and that the collar
on the cable connector is tightened firmly. Connect the other end of the cable (male) to the
NMEA 2000® network in the same manner. The J2K100 is designed such that you can plug or
unplug it from an NMEA 2000® network while the power to the network is connected or
disconnected. Please follow recommended practices for installing NMEA 2000® network
products.
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Figure 3 – NMEA 2000® Connector Face Views
2.4.2 Connecting the J2K100 J1939 Interface
Vertical text on the J2K100 label identifies the J1939 connector. With the label right side up,
the J1939 connector can be found on the left side of the enclosure. In order to make the J1939
connection, you will need to locate the supplied female field attachable connector. This
connector is fitted to one end of a 3-conductor cable (not supplied). Make the connections
between the 3-conductor cable and the field attachable connector by following the instruction
contained within the bag. Although the field attachable connector has 5 terminals, you only
need to connect the CAN bus signals and ground signal (NET-H white terminal, NET-L blue
terminal, and ground or NET-C black terminal). The other end of the 3-conductor cable needs
to be tied into the J1939 network. You will need to identify the CAN bus signals on the J1939
network by reviewing the manufacturer’s documentation. Most likely, they will identify the CAN
bus signals as CAN-H and CAN-L which corresponds to the field attachable terminals NET-H
and NET-L respectively. You will also need to connect the NET-C or ground signal found within
the field attachable connector to the J1939 ground connection.
2.4.3 Checking Connections
Once the NMEA 2000® and J1939 connections to the J2K100 have been completed, check to
see that information is being properly transmitted by observing an appropriate NMEA 2000®
display. If you don’t see engine and/or generator data, refer to Section 4, “Troubleshooting”.
2.5 Configuring the J2K100
As shipped from the factory, the J2K100 does not require any special configuration and will
work for most applications. However, there are several configurable items within the J2K100,
including: 1) J1939 source address selection, 2) NMEA 2000® engine instance selection, 3)
NMEA 2000® transmission instance selection, 4) J1939 diagnostic messages enable/disable,
and 4) NMEA 2000® PGN enable/disable.
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2.5.1 J1939 Source Address Selection
The J2K100 connects into a J1939 network and translates messages from a single J1939
device into NMEA 2000® messages. By default, the J2K100 only translates J1939 messages
from a J1939 device with a source address of zero. If the J1939 source address of the engine,
transmission, or genset to be monitored is different than zero, then the J2K100 must be
programmed with the appropriate J1939 source address. This can be done with the Maretron
DSM200 display or other NMEA 2000® display unit that is capable of configuring the J2K100.
Please refer to the Maretron DSM200 User’s Manual for details.
2.5.2 NMEA 2000® Engine Instance Selection
NMEA 2000® provides a unique engine instance for each engine on a vessel. Single engine
vessels use engine instance zero (0) while dual engine vessels use engine instance zero (0)
for the port engine and engine instance one (1) for the starboard engine. By default the
J2K100 uses engine instance zero (0). If you are installing the J2K100 on a single engine
vessel, then you don’t have to configure this parameter. However, if you install two J2K100s
for dual engine vessels, then you will need to configure the starboard engine J2K100 to use
engine instance one (1). You configure the J2K100 using a Maretron DSM200 display or other
NMEA 2000® display unit that is capable of configuring the J2K100. Please refer to the
Maretron DSM200 User’s Manual for details.
2.5.3 NMEA 2000® Transmission Instance Selection
NMEA 2000® provides a unique transmission instance for each transmission on a vessel.
Single transmission vessels use transmission instance zero (0) while dual transmission
vessels use transmission instance zero (0) for the port transmission and transmission instance
one (1) for the starboard transmission. By default the J2K100 uses transmission instance zero
(0). If you are installing the J2K100 on a single transmission vessel, then you don’t have to
configure this parameter. However, if you install two J2K100s for dual transmission vessels,
then you will need to configure the starboard transmission J2K100 to use transmission
instance one (1). You configure the J2K100 using a Maretron DSM200 display or other NMEA
2000® display unit that is capable of configuring the J2K100. Please refer to the Maretron
DSM200 User’s Manual for details.
2.5.4 J1939 Diagnostic Messages Enable/Disable
The J2K100 is capable of re-broadcasting J1939 diagnostic messages output by the monitored
engine, transmission, or genset onto the NMEA 2000® network. As shipped from the factory,
the J2K100 does not transmit J1939 diagnostic messages over the NMEA 2000® network. If
this behavior is desired, it may be enabled with the Maretron DSM200 display or other NMEA
2000® display unit that is capable of configuring the J2K100. Please refer to the Maretron
DSM200 User’s Manual for details.
2.5.5 NMEA 2000® PGN Enable/Disable
The J2K100 is capable of transmitting several different kinds of NMEA 2000® messages (or
PGNs) associated with engines, transmissions, and gensets. The J2K100 automatically
detects incoming messages from the J1939 network and translates them into corresponding
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NMEA 2000® PGNs. For example, if the J2K100 receives engine related messages from the
J1939 network but no transmission or genset messages, then the J2K100 will generate the
corresponding NMEA 2000® engine PGNs but it will not transmit any NMEA 2000®
transmission or genset messages. As another example, let’s say that there is an engine and a
genset connected to the J1939 network yet we are only interested in having the engine
messages translated to corresponding NMEA 2000® PGNs. In this case, the J2K100 can be
configured to enable engine PGNs while disabling genset PGNs. You can configure the
J2K100 using a Maretron DSM200 display or other NMEA 2000® display unit that is capable of
configuring the J2K100. Please refer to the Maretron DSM200 User’s Manual for details.
3 Maintenance
Regular maintenance is important to ensure continued proper operation of the Maretron
J2K100. Perform the following tasks periodically:
• Clean the unit with a soft cloth. Do not use chemical cleaners as they may remove
paint or markings or may corrode the J2K100 enclosure or seals.
• Ensure that the unit is mounted securely and cannot be moved relative to the mounting
surface. If the unit is loose, tighten the mounting screws.
• Check the security of the cable connected to the NMEA 2000® and J1939 connectors
and tighten if necessary.
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4 Troubleshooting
If you notice unexpected operation of the Maretron J2K100, follow the troubleshooting
procedures in this section to remedy simple problems.
Symptom
Troubleshooting Procedure
No engine, transmission Ensure that the J1939 network is operational by observing J1939
or genset data visible on gauges or displays. You should see information transmitted from
NMEA 2000® network.
the engine, transmission, or genset displayed on the J1939
displays. If you don’t see data, try disconnecting the J1939
connection you made to the J2K100 as something may have been
connected incorrectly.
Once you are sure that the J1939 network is operational with a
J2K100 connected, ensure that the NMEA 2000® network is
operational by observing displays. You should see information
from components besides the ones attached to the J2K100 which
verifies an operational NMEA 2000® network. If you don’t see data,
try disconnecting the NMEA 2000 connection you made to the
J2K100 as something may have been connected incorrectly.
Once you are sure that the J1939 and NMEA 2000 networks are
operational with a connected J2K100, ensure that the NMEA
2000® connector is securely connected to the NMEA 2000®
network and the J1939 connector is securely connected to the
J1939 network.
Ensure that the J2K100 has the appropriate NMEA 2000® PGNs
enabled as described in 2.5.5.
If these steps do not solve your problem, please contact Maretron Technical Support (refer to
Section 6 for contact information).
Warning: There are no user-serviceable components inside the Maretron J2K100. Opening
the J2K100 will expose the sensitive electronic components to adverse environmental
conditions that may render the unit inoperative. Please do not open the J2K100, as this will
automatically void the warranty. If service is required, please return the unit to an authorized
Maretron service location.
5 Technical Specifications
As Maretron is constantly improving its products, all specifications are subject to change
without notice. Maretron products are designed to be accurate and reliable; however, they
should be used only as aids to navigation and not as a replacement for traditional navigation
aids and techniques.
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J1939 Data Translated to NMEA 2000® Data
J1939 SPG/PGN
Description
NMEA 2000® PGN
127488
127488
127489
127489
127489
127489
127489
127489
127489
127489
127489
127489
127498
127498
127498
127493
127493
127493
190 / 61444
102 / 65270
100 / 65263
175 / 65262
110 / 65262
167 / 65271
183 / 65266
247 / 65253
109 / 65263
94 / 65263
Engine Speed
Engine Turbocharger Boost Pressure
Engine Oil Pressure
Engine Oil Temperature 1
Engine Coolant Temperature
Alternator Potential (Voltage)
Engine Fuel Rate
Engine Total Hours of Operation
Engine Coolant Pressure
Engine Fuel Delivery Pressure
Engine Percent Load at Current Speed
Actual Engine – Percent Torque
Engine Rated Speed
92 / 61443
513 / 61444
189 / 65214
237 / 65260
234 / 65242
523 / 61445
127 / 65272
177 / 65272
Vehicle Identification Number
Software Identification
Transmission Current Gear
Transmission Oil Pressure
Transmission Oil Temperature
Certifications
Parameter
Comment
NMEA 2000®
Level B+
Maritime Navigation and Radiocommunication Equipment & Systems
FCC and CE Mark
IEC 60945
Electromagnetic Compatibility
NMEA 2000® Parameter Group Numbers (PGNs)
Description
PGN #
PGN Name
Default Rate
10 times/second
1 time/second
N/A
Periodic Data PGNs
127488 Engine Parameters, Rapid Update
127489 Engine Parameters, Dynamic
127498 Engine Parameters, Static
127493 Transmission Parameters, Dynamic
10 times/second
65030
65226
65227
65228
65229
65230
65231
65232
65234
65235
65236
J1939 Generator Average Basic AC Quantities
J1939 Diagnostic Message #1
J1939 Diagnostic Message #2
J1939 Diagnostic Message #3
J1939 Diagnostic Message #4
J1939 Diagnostic Message #5
J1939 Diagnostic Message #6
J1939 Diagnostic Message #8
J1939 Diagnostic Message #10
J1939 Diagnostic Message #11
J1939 Diagnostic Message #12
10 times/second
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Response to Requested PGNs
Protocol PGNs
126464 PGN List (Transmit and Receive)
126996 Product Information
126998 Configuration Information
059392 ISO Acknowledge
059904 ISO Request
N/A
N/A
N/A
N/A
N/A
060928 ISO Address Claim
065240 ISO Address Command
126208 NMEA
N/A
N/A
N/A
Maretron Proprietary PGN’s
128720 Configuration
N/A
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J2K100 User’s Manual
Electrical
Parameter
Value
9 to 16 Volts
<150mA
3
Comment
Operating Voltage
DC Voltage
Power Consumption
Load Equivalence Number (LEN)
Reverse Battery Protection
Load Dump Protection
Average Current Drain
NMEA 2000® Spec. (1LEN = 50 mA)
Indefinitely
Yes
Yes
Energy Rated per SAE J1113
Mechanical
Parameter
Size
Value
4.50” x 3.20” x 2.09”
8 oz.
Comment
Including Flanges for Mounting
Weight
Environmental
Parameter
Value
Exposed
IP66
IEC 60954 Classification
Degree of Protection
Operating Temperature
Storage Temperature
Relative Humidity
Vibration
-25°C to 55°C
-40°C to 70°C
93%RH @40° per IEC60945-8.2
2-13.2Hz @ ±1mm, 13.2-100Hz @ 7m/s2 per IEC 60945-8.7
12.5mm Nozzle @ 100liters/min from 3m for 30min per IEC 60945-8.8
Ultraviolet B, A, Visible, and Infrared per IEC 60945-8.10
Rain and Spray
Solar Radiation
Corrosion (Salt Mist)
4 times 7days @ 40°C, 95%RH after 2 hour Salt Spray Per IEC 60945-8.12
Conducted and Radiated Emission per IEC 60945-9
Conducted, Radiated, Supply, and ESD per IEC 60945-10
Dangerous Voltage, Electromagnetic Radio Frequency per IEC 60945-12
Electromagnetic Emission
Electromagnetic Immunity
Safety Precautions
6 Technical Support
If you require technical support for Maretron products, you can reach us in any of the following
ways:
Telephone: 1-866-550-9100
Fax: 1-602-861-1777
E-mail: [email protected]
Mail: Maretron, LLC
Attn: Technical Support
9034 N. 23rd Ave Suite 13
Phoenix, AZ 85021 USA
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7 Installation Template
Please check the dimensions before using the following diagram as a template for drilling the
mounting holes because the printing process may have distorted the dimensions.
2.35”
3.90”
Figure 4 – Mounting Surface Template
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8 Maretron (2 Year) Limited Warranty
Maretron warrants the J2K100 to be free from defects in materials and workmanship for two (2) years from the
date of original purchase. If within the applicable period any such products shall be proved to Maretron’s
satisfaction to fail to meet the above limited warranty, such products shall be repaired or replaced at Maretron’s
option. Purchaser's exclusive remedy and Maretron’s sole obligation hereunder, provided product is returned
pursuant to the return requirements below, shall be limited to the repair or replacement, at Maretron’s option, of
any product not meeting the above limited warranty and which is returned to Maretron; or if Maretron is unable to
deliver a replacement that is free from defects in materials or workmanship, Purchaser’s payment for such
product will be refunded. Maretron assumes no liability whatsoever for expenses of removing any defective
product or part or for installing the repaired product or part or a replacement therefore or for any loss or damage
to equipment in connection with which Maretron’s products or parts shall be used. With respect to products not
manufactured by Maretron, Maretron’s warranty obligation shall in all respects conform to and be limited to the
warranty actually extended to Maretron by its supplier. The foregoing warranties shall not apply with respect to
products subjected to negligence, misuse, misapplication, accident, damages by circumstances beyond
Maretron’s control, to improper installation, operation, maintenance, or storage, or to other than normal use or
service.
THE FOREGOING WARRANTIES ARE EXPRESSLY IN LIEU OF AND EXCLUDES ALL OTHER EXPRESS OR
IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND OF FITNESS FOR A PARTICULAR PURPOSE.
Statements made by any person, including representatives of Maretron, which are inconsistent or in conflict with
the terms of this Limited Warranty, shall not be binding upon Maretron unless reduced to writing and approved by
an officer of Maretron.
IN NO CASE WILL MARETRON BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES, DAMAGES
FOR LOSS OF USE, LOSS OF ANTICIPATED PROFITS OR SAVINGS, OR ANY OTHER LOSS INCURRED
BECAUSE OF INTERRUPTION OF SERVICE. IN NO EVENT SHALL MARETRON’S AGGREGATE LIABILITY
EXCEED THE PURCHASE PRICE OF THE PRODUCT(S) INVOLVED. MARETRON SHALL NOT BE SUBJECT
TO ANY OTHER OBLIGATIONS OR LIABILITIES, WHETHER ARISING OUT OF BREACH OF CONTRACT OR
WARRANTY, TORT (INCLUDING NEGLIGENCE), OR OTHER THEORIES OF LAW WITH RESPECT TO
PRODUCTS SOLD OR SERVICES RENDERED BY MARETRON, OR ANY UNDERTAKINGS, ACTS OR
OMISSIONS RELATING THERETO.
Maretron does not warrant that the functions contained in any software programs or products will meet
purchaser’s requirements or that the operation of the software programs or products will be uninterrupted or error
free. Purchaser assumes responsibility for the selection of the software programs or products to achieve the
intended results, and for the installation, use and results obtained from said programs or products. No
specifications, samples, descriptions, or illustrations provided Maretron to Purchaser, whether directly, in trade
literature, brochures or other documentation shall be construed as warranties of any kind, and any failure to conform
with such specifications, samples, descriptions, or illustrations shall not constitute any breach of Maretron’s limited
warranty.
Warranty Return Procedure:
To apply for warranty claims, contact Maretron or one of its dealers to describe the problem and determine the
appropriate course of action. If a return is necessary, place the product in its original packaging together with
proof of purchase and send to an Authorized Maretron Service Location. You are responsible for all shipping and
insurance charges. Maretron will return the replaced or repaired product with all shipping and handling prepaid
except for requests requiring expedited shipping (i.e. overnight shipments). Failure to follow this warranty return
procedure could result in the product’s warranty becoming null and void.
Maretron reserves the right to modify or replace, at its sole discretion, without prior notification, the warranty listed
above. To obtain a copy of the then current warranty policy, please go to the following web page:
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Appendix A – NMEA 2000® Interfacing
J2K100 NMEA 2000® Periodic Data Transmitted PGNs
PGN 127488 – Engine Parameters, Rapid Update
The J2K100 uses this PGN to transmit rapidly changing engine data.
Field 1: Engine Instance – This field indicates the particular engine for which this data
applies. A single engine will have an instance of 0. Engines in multi-engine boats will
be numbered starting at 0 at the bow of the boat incrementing to n going in towards
the stern of the boat. For engines at the same distance from the bow are stern, the
engines are numbered starting from the port side and proceeding towards the
starboard side.
2: Engine Speed – This field indicates the rotational speed of the engine in units of ¼
RPM.
3: Engine Boost Pressure – This field indicates the turbocharger boost pressure in units
of 100 Pa.
4: Engine tilt/trim – This field indicates the tilt or trim (positive or negative) of the engine
in units of 1 percent.
5: Reserved – This field is reserved by NMEA; therefore, the J2K100 sets all bits to a
logic 1.
PGN 127489 – Engine Parameters, Dynamic
The J2K100 uses this PGN to transmit more slowly changing engine data.
Field 1: Engine Instance – This field indicates the particular engine for which this data
applies. A single engine will have an instance of 0. Engines in multi-engine boats will
be numbered starting at 0 at the bow of the boat incrementing to n going in towards
the stern of the boat. For engines at the same distance from the bow are stern, the
engines are numbered starting from the port side and proceeding towards the
starboard side.
2: Engine Oil Pressure – This field indicates the oil pressure of the engine in units of
100 Pa.
3: Engine Oil Temperature – This field indicates the oil temperature of the engine in
units of 0.1°K.
4: Engine Temperature – This field indicates the temperature of the engine coolant in
units of 0.1°K.
5: Alternator Potential – This field indicates the alternator voltage in units of 0.01V.
6: Fuel Rate – This field indicates the fuel consumption rate of the engine in units of
0.0001 cubic meters / hour.
7: Total Engine Hours – This field indicates the cumulative runtime of the engine in units
of 1 second.
8: Engine Coolant Pressure – This field indicates the pressure of the engine coolant in
units of 100 Pa.
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Appendix A – NMEA 2000 Interfacing
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9: Fuel Pressure – This field indicates the pressure of the engine fuel in units of 1000
Pa.
10: Reserved – This field is reserved by NMEA; therefore, the J2K100 sets all bits to a
logic 1.
11: Engine Discrete Status 1 – This field indicates warning conditions of the engine with
the following bit assignments (value of 1 indicates warning present):
Bit 0: Check Engine
Bit 1: Over Temperature
Bit 2: Low Oil Pressure
Bit 3: Low Oil Level
Bit 4: Low Fuel Pressure
Bit 5: Low System Voltage
Bit 6: Low Coolant Level
Bit 7: Water Flow
Bit 8: Water in Fuel
Bit 9: Charge Indicator
Bit 10:Preheat Indicator
Bit 11:High Boost Pressure
Bit 12:Rev Limit Exceeded
Bit 13:EGR System
Bit 14:Throttle Position Sensor
Bit 15: Emergency Stop Mode
12: Engine Discrete Status 2 – This field indicates warning conditions of the engine with
the following bit assignments (value of 1 indicates warning present):
Bit 0: Warning Level 1
Bit 1: Warning Level 2
Bit 2: Power Reduction
Bit 3: Maintenance Needed
Bit 4: Engine Comm Error
Bit 5: Sub or Secondary Throttle
Bit 6: Neutral Start Protect
Bit 7: Engine Shutting Down
Bit 8-15: These bits are reserved and should be masked when read
13: Percent Engine Load – This field indicates the percent load of the engine in units of 1
percent.
14: Percent Engine Torque – This field indicates the percent torque of the engine in units
of 1 percent.
PGN 127498 – Engine Parameters, Static
The J2K100 uses this PGN to transmit unchanging engine data.
Field 1: Engine Instance – This field indicates the particular engine for which this data
applies. A single engine will have an instance of 0. Engines in multi-engine boats will
be numbered starting at 0 at the bow of the boat incrementing to n going in towards
the stern of the boat. For engines at the same distance from the bow are stern, the
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engines are numbered starting from the port side and proceeding towards the
starboard side.
2: Rated Engine Speed – This field indicates the maximum rated rotational speed of the
engine in units of ¼ RPM.
3: VIN – This field indicates the Vehicle Identification Number of the engine as a textual
representation.
4: Software ID – This field indicates the version number or other identifying information
for the software in the engine as a textual representation.
PGN 127493 – Transmission Parameters, Dynamic
The J2K100 uses this PGN to transmit rapidly changing transmission data.
Field 1: Transmission Instance – This field indicates the particular transmission for which this
data applies. A single transmission will have an instance of 0. Transmissions in multi-
transmission boats will be numbered starting at 0 at the bow of the boat incrementing
to n going in towards the stern of the boat. For transmissions at the same distance
from the bow are stern, the transmissions are numbered starting from the port side
and proceeding towards the starboard side.
2: Transmission Gear – This field indicates the current gear the transmission is
operating in.
3: Reserved – This field is reserved by NMEA; therefore, the J2K100 sets all bits to a
logic 1.
4: Transmission Oil Pressure – This field indicates the oil pressure of the transmission
in units of 100 Pa.
5: Transmission Oil Temperature – This field indicates the oil temperature of the
transmission in units of 0.1°K.
6: Transmission Discrete Status – This field indicates warning conditions of the
transmission with the following bit assignments (value of 1 indicates warning
present):
Bit 0: Check Transmission
Bit 1: Over Temperature
Bit 2: Low Oil Pressure
Bit 3: Low Oil Level
Bit 4: Sail Drive
Bit 5-8: These bits are reserved and should be masked when read
7: Reserved – This field is reserved by NMEA; therefore, the J2K100 sets all bits to a
logic 1.
PGN 65030 – Generator Average Basic AC Quantities
The J2K100 uses this PGN to transmit data concerning the electrical output from a
genset.
Field 1: Generator Average Line-Line AC RMS Voltage – This field indicates the average line
to line voltage measured at the generator output in units of 1 Volt.
2: Generator Average Line-Neutral AC RMS Voltage – This field indicates the average
line to neutral voltage measured at the generator output in units of 1 Volt.
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3: Generator Average AC RMS Frequency – This field indicates the average frequency
of the generated power measured at the generator output in units of 1/128 Hz.
4: Generator Average RMS Current – This field indicates the average current measured
at the generator output in units of 1 Ampere.
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