Technical Reference for Garmin® NMEA 2000® Products + -
All rights reserved. Except as expressly provided herein, no part of this manual may be reproduced, copied, transmitted, disseminated, downloaded or stored in any storage medium, for any purpose without the express prior written consent of Garmin.
Introduction Introduction A NMEA 2000 network consists of connected NMEA 2000 devices that communicate using basic plug-and-play functionality. This technical reference provides basic NMEA 2000 component identification, basic NMEA 2000 network-building instructions, and a list of NMEA 2000specific data used with Garmin NMEA 2000-certified displays and sensors.
Table of Contents Table of Contents Introduction........................................................................................................................................................................................ iii Contact Garmin.......................................................................................................................................................................................................iii NMEA 2000 Fundamentals..................................
NMEA 2000 Fundamentals NMEA 2000 Fundamentals A NMEA 2000 network is made of connected NMEA 2000 devices that communicate using basic plug-and-play functionality. If your boat already contains a NMEA 2000 network and you would like to add Garmin NMEA 2000 components, see page 8. For a glossary of commonly used NMEA 2000 terms, see page 8. After you have installed your NMEA 2000 network, use the checklist on page 37 to verify the installation.
NMEA 2000 Fundamentals NMEA 2000 Components The main components of a NMEA 2000 network are T-connectors, terminators, backbone/drop cables, and a power cable. The following cables, connectors, and terminators are sold by Garmin, and as of January 2009, they are NMEA 2000 approved. NMEA 2000-approved cables sold by Garmin feature the NMEA 2000 logo on the tag with the part number.
NMEA 2000 Fundamentals Building a NMEA 2000 Network The main communication channel of a NMEA 2000 network is a backbone to which your NMEA 2000 devices connect. Each NMEA 2000 device connects to the backbone with a T-connector. The NMEA 2000 backbone must be connected to power, and terminators must be installed at both ends for the network to function correctly. When you design a NMEA 2000 network, start by creating a diagram of the network.
NMEA 2000 Fundamentals Linear Backbone Construction Use the NMEA 2000 T-connectors to construct your NMEA 2000 backbone, and extend the backbone with appropriate lengths of backbone cable if necessary. Use one T-connector per device. Use the sides of the T-connector to construct the backbone of the NMEA 2000 network, and use the top of the T-connector to attach a NMEA 2000 device.
NMEA 2000 Fundamentals Power Connection and Distribution Your NMEA 2000 network must be connected to a 12 Vdc power supply. Do not connect your NMEA 2000 network to any other voltage source, such as a 24 Vdc power supply. Use a NMEA 2000 power cable to connect your NMEA 2000 backbone to the auxiliary power switch on your boat.
NMEA 2000 Fundamentals End-powered NMEA 2000 network, incorrectly designed: + NMEA 2000compliant device LEN = 4 - Drop cable Length = 2 m Power cable Length = 2 m NMEA 2000compliant device LEN = 7 NMEA 2000compliant device LEN = 5 T C E R R O C N I Backbone cable Length = 10 m Backbone cable Length = 20 m When the voltage drop formula is applied to this example, we see that the voltage drop is greater than 3.0 Vdc, so this NMEA 2000 network will not function correctly when powered at the end.
NMEA 2000 Fundamentals Proper Termination You must install terminators at the ends of your NMEA 2000 backbone for it to function correctly. You have two options when installing terminators on your NMEA 2000 network. 1. Typical Terminators If your NMEA 2000 network is built with correct linear backbone construction, use one female terminator and one male terminator. Install the terminators at opposite ends of your NMEA 2000 network.
NMEA 2000 Fundamentals Cable Length and Device Limits When building your NMEA 2000 network, keep in mind these limitations: • The distance between any two points on the NMEA 2000 network must not exceed 100 m (328 ft). To estimate this distance, measure between the terminators on your backbone and add the length of the drop cable for the devices connected to the T-connectors at the ends of the network. • The total length of all drop cables cannot exceed 78 m (256 ft).
General NMEA 2000 Data Type Requirements General NMEA 2000 Data Type Requirements Each NMEA 2000-certified sensor provides unique information to the NMEA 2000-certified display devices (such as a GPSMAP 4000/5000 series chartplotter or a GMI 10) on the NMEA 2000 network. The data you can view on your display device depends on the sensors you have installed and configured.
General NMEA 2000 Data Type Requirements Category Data Type PGN Data Required Typical Sender Navigation Information (continued) GPS Speed 129026 - COG/SOG and 129029 - GNSS Position GPS Antenna Position 129026 - COG/SOG and 129029 - GNSS Position GPS Antenna Turn 129026 - COG/SOG, 129029 - GNSS Position, and 129284 - Nav Data Garmin Chartplotter and GPS Antenna Odometer 129026 - COG/SOG and 129029 - GNSS Position GPS Antenna Trip Odometer 129026 - COG/SOG and 129029 - GNSS Position GPS A
General NMEA 2000 Data Type Requirements Category Sailing Data Type PGN Data Required Typical Sender Cardinal Wind Direction Either: 130306 - Wind Data, 129026 - COG/SOG, 129029 - GNSS Position, 127250 - Vessel Heading, and • Wind Sensor, a Water Speed 128259 - Water Speed Sensor, a Heading Sensor, and a (If a Heading Sensor and Water Speed Sensor are GPS Antenna not present, a less-accurate reading can be calculated • Wind Sensor and a GPS Antenna using only the Wind Sensor and GPS antenna • Wind Se
General NMEA 2000 Data Type Requirements Category Data Type PGN Data Required Typical Sender Water Depth 128267 - Water Depth Depth Transducer Temperature 130312 - Temp, 130310 - Envir Param Old, or 130311 - Envir Param Water Temperature Sensor Speed 128259 - Water Speed Water Speed Sensor Set 129026 - COG/SOG, 129029 - GNSS Position, 128259 - Water Speed, and 127250 - Vessel Heading GPS Antenna, Water Speed Sensor, and Heading Sensor Drift 129026 - COG/SOG, 129029 - GNSS Position, 128259
NMEA 2000-Compatible Display Device PGN Information NMEA 2000-Certified Display Device PGN Information All data transmitted on a NMEA 2000 network are organized into groups. These groups are identified by a Parameter Group Number (PGN) that describes the type of data contained in the group. All Garmin NMEA 2000 devices use the proprietary PGN numbers 126720 and 61184. All other PGN numbers follow the NMEA 2000 standard.
NMEA 2000-Compatible Display Device PGN Information GPSMAP 4000/5000 Series Chartplotters Receive Transmit 059392 ISO Acknowledgment 059392 ISO Acknowledgment 059904 ISO Request 059904 ISO Request 060928 ISO Address Claim 060928 ISO Address Claim 126208 NMEA - Command/Request/Acknowledge Group Function 126208 NMEA - Command/Request/Acknowledge Group Function 126464 Transmit/Receive PGN List Group Function 126464 Transmit/Receive PGN List Group Function 126992 System Time 126996 Pro
NMEA 2000-Compatible Display Device PGN Information GPSMAP 700 Series Chartplotters Receive Transmit 059392 ISO Acknowledgment 059392 ISO Acknowledgment 059904 ISO Request 059904 ISO Request 060928 ISO Address Claim 060928 ISO Address Claim 126208 NMEA - Command/Request/Acknowledge Group Function 126208 NMEA - Command/Request/Acknowledge Group Function 126464 Transmit/Receive PGN List Group Function 126464 Transmit/Receive PGN List Group Function 126996 Product Information 126996 P
NMEA 2000-Compatible Display Device PGN Information GPSMAP 4x1/5x1 Series Chartplotters Receive Transmit 059392 ISO Acknowledgment 059392 ISO Acknowledgment 059904 ISO Request 059904 ISO Request 060928 ISO Address Claim 060928 ISO Address Claim 126208 NMEA - Command/Request/Acknowledge Group Function 126208 NMEA - Command/Request/Acknowledge Group Function 126464 Transmit/Receive PGN List Group Function 126464 Transmit/Receive PGN List Group Function 126996 Product Information 12699
NMEA 2000-Certified Sensor PGN Information GMI 10 Receive Transmit 059392 ISO Acknowledgment 059392 ISO Acknowledgment 059904 ISO Request 059904 ISO Request 060928 ISO Address Claim 060928 ISO Address Claim 126208 NMEA - Command/Request/Acknowledge Group Function 126208 NMEA - Command/Request/Acknowledge Group Function 126464 Transmit/Receive PGN List Group Function 126464 Transmit/Receive PGN List Group Function 126992 System Time 126996 Product Information 126996 Product Inform
NMEA 2000-Certified Sensor PGN Information NMEA 2000-Certified Sensor PGN Information The following tables list the non-proprietary PGN information for all Garmin NMEA 2000-certified sensors.
NMEA 2000-Certified Sensor PGN Information Transmit Receive 126464 Transmit/Receive PGN List Group Function 126996 Product Information 127488 Engine Parameters - Rapid Update 126208 NMEA - Command/Request/Acknowledge Group Function GFL 10 (Garmin Fluid Level Adapter) Transmit Receive 059392 ISO Acknowledgment 059392 ISO Acknowledgment 060928 ISO Address Claim 059904 ISO Request 126208 NMEA - Command/Request/Acknowledge Group Function 060928 ISO Address Claim 126464 Transmit/Receive
NMEA 2000-Certified Sensor PGN Information GWS 10 (Garmin Wind Sensor) Transmit Receive 059392 ISO Acknowledgment 059392 ISO Acknowledgment 060928 ISO Address Claim 059904 ISO Request 126208 NMEA - Command/Request/Acknowledge Group Function 060928 ISO Address Claim 126464 Transmit/Receive PGN List Group Function 126208 NMEA - Command/Request/Acknowledge Group Function 126996 Product Information 130306 Wind Data 130312 Temperature 130314 Actual Pressure GHP 10 (Marine Autopilot Sys
NMEA 2000-Certified Sensor Configuration Information GXM 51 (XM Weather and Radio - North America Only) Transmit Receive 059392 ISO Acknowledgment 059392 ISO Acknowledgment 060928 ISO Address Claim 059904 ISO Request 126208 NMEA - Command/Request/Acknowledge Group Function 060928 ISO Address Claim 126464 Transmit/Receive PGN List Group Function 126208 NMEA - Command/Request/Acknowledge Group Function 126996 Product Information VHF 200 Transmit Receive 059392 ISO Acknowledgment 05939
NMEA 2000-Certified Sensor Configuration Information AIS 300 Receive Transmit 059392 ISO Acknowledgment 059392 ISO Acknowledgment 059904 ISO Request 060928 ISO Address Claim 060928 ISO Address Claim 126208 NMEA Request/Command/Acknowledge Group Function 126208 NMEA - Command/Request/Acknowledge Group Function 126464 PGN List 126992 System Time 126996 Product Information 129038 AIS Class A Position Report 129039 AIS Class B Position Report 129040 AIS Class B Extended Position Repo
NMEA 2000-Certified Sensor Configuration Information NMEA 2000-Certified Sensor Configuration Information Garmin NMEA 2000-certified sensors each have a Sensor Configuration Guide included in the package. For convenience, this section contains the configuration information for all Garmin NMEA 2000 sensor. All NMEA 2000 device configuration options are set from the NMEA 2000 configuration menu on your NMEA 2000 display device.
NMEA 2000-Certified Sensor Configuration Information GFS 10 (Garmin Fuel Sensor) Caution: The GFS 10 is a sensor that helps you better determine the amount of fuel used on your boat. You should not rely solely on the GFS 10 for fuel-level information. Carefully compare information displayed on the unit to all available fuel-level instruments and sources.
NMEA 2000-Certified Sensor Configuration Information Configuring Engine and Tank Information If you have a multi-engine or a multi-tank setup on your boat, specify which engine or tank is associated with each GFS 10. Tip: The serial number of each GFS 10 is shown on the NMEA 2000 device configuration menu to help differentiate among multiple GFS 10 devices. To configure tank and engine information for the GFS 10: 1.
NMEA 2000-Certified Sensor Configuration Information GRA 10 (Garmin Rudder Angle Adapter) NOTE: This section provides specific configuration information for the GRA 10 adapter using your compatible Garmin display device. To access the NMEA 2000 configuration menu on your display device, consult the documentation provided with your display device. Calibrating the Rudder Angle To use the GRA 10 adapter, you must calibrate the angle of the rudder that the adapter is associated with. 1.
NMEA 2000-Certified Sensor Configuration Information 6. After the command, enter the angle of the starboard rudder position as a whole number greater than 0 and less than 180, in degrees, followed by Done. For example, RUDDERPOS=45Done. 7. Center the rudder. 8. Enter the following command: “RUDDERPOS=0Done” 9. Move the rudder fully to port and observe the angle of the rudder position, in degrees. 10.Enter the following command: “RUDDERPOS=” 11.
NMEA 2000-Certified Sensor Configuration Information 1. From the NMEA 2000 Devices list, select the GET 10 device. 2. Select an option: • For most Garmin chartplotters, select Review > Engine Number. • For other Garmin marine devices, select Config > Engine Number. 3. Select the number of the engine that the adapter is associated with. 4. Select Done.
NMEA 2000 Checklist • For most Garmin chartplotters, select Review > Generic Config. • For other Garmin marine devices, select Config >Generic Configuration. 3. Enter the following command: “INSTANCE=” 4. After the command, enter a whole number between 1 and 253, which indicates the engine number, followed by Done. For example, INSTANCE=2Done indicates that the adapter is associated with engine number 2.
NMEA 2000 Checklist • For other Garmin marine devices, select Config > Tank Number. 3. Select a tank number. 4. Select OK. Configuring the NMEA 2000 Tank Capacity You can indicate the capacity of the fluid tank that the GFL 10 adapter is associated with. 1. From the NMEA 2000 Devices list, select the GFL 10 device. 2. Select an option: • For most Garmin chartplotters, select Review > N2K Tank Capacity. • For other Garmin marine devices, select Config > N2K Tank Capacity. 3. Select the tank capacity. 4.
NMEA 2000 Checklist To test the gauge-type setting: 1. When the boat is not moving, put the engine in neutral. 2. Use the throttle to increase the engine RPM. If the fluid-level reading changes with the engine RPM, change the gauge type. To change the gauge type: 1. From the NMEA 2000 Devices list, select the GFL 10 device. 2. Select an option: • For most Garmin chartplotters, select Review > Gauge Type. • For other Garmin marine devices, select Config > Gauge Type. 3.
NMEA 2000 Checklist For example, FLUIDTYPE=1Done indicates that the tank contains fresh water. Fluid Type FLUIDTYPE Value Fluid Type FLUIDTYPE Value Fuel 0 Live well 3 Fresh water 1 Oil 4 Waste water 2 Black water (sewage) 5 Restoring Factory Default Settings When you restore factory default settings, you will lose all custom configuration settings except fluid-level calibration. 1. From the NMEA 2000 Devices list, select the GFL 10 device. 2.
NMEA 2000 Checklist 8. Enter the following command: “TRIMTABPOS=” 9. After the command, enter the percentage of the lowest trim tab position as a whole number between 0 and 100, and select Done. For example, TRIMTABPOS=100Done. 10.To enter an additional, optional trim tab position, move both trim tabs to a new position, and observe the trim tab position as a percentage of the full range of motion of the trim tab. 11. Enter the following command: “TRIMTABPOS=” 12.
NMEA 2000 Checklist 4. Select Done. Troubleshooting the Sensor Number If multiple GST 10 adapters are assigned to the same NMEA 2000 temperature source, each adapter is assigned a unique sensor number automatically. If the “Invalid NMEA 2000 temperature configuration” error message appears, you must assign a unique sensor number to each adapter.
NMEA 2000 Checklist Location TEMPSOURCE Value Location TEMPSOURCE Value Water 0 Live well 5 Air outside 1 Bait well 6 Air inside 2 Refrigeration 7 Engine room 3 Heating system 8 Main cabin 4 Freezer 13 To configure the temperature offset if the menu option is not displayed: If the temperature data displayed on the gauge connected to the GST 10 adapter is not the same as temperature data displayed on other devices, you can configure the temperature offset to increase or decrease the
NMEA 2000 Checklist Intelliducer (Intelligent Depth Transducer–Transom Mount and Thru-Hull) Setting the Keel Offset Adjust the Keel Offset to display a depth reading from the water line or from the lowest point of the boat (keel) rather than the actual location of the Intelliducer. To adjust the keel offset: 1. While viewing the NMEA 2000 device configuration menu, select a specific Intelliducer and select Config > Keel Offset. 2.
NMEA 2000 Checklist Configuring the Wind Angle Filter The wind angle filter governs how quickly the NMEA 2000-compatible display device shows a change in the wind angle. A lower filter setting shows changes in the wind angle more gradually, and may stabilize the display. To configure the wind angle filter: 1. While viewing the NMEA 2000 device information, select Config > Wind Angle Filter. 2. Choose from the following options to adjust the filter settings. • Off—the wind angle data is not filtered.
NMEA 2000 Checklist Use this checklist to confirm your NMEA 2000 installation.
