Installation Instructions
Page 1
... GMI 20 Installation Instructions To obtain the best possible performance, install this device is on the opposite side of the surface. Mounting the Device NOTICE If you are mounting the device in fiberglass, when drilling the pilot holes, it to the location where you plan to mount the marine instrument. 3 If you experience difficulty during the installation, contact Garmin® Support...
... GMI 20 Installation Instructions To obtain the best possible performance, install this device is on the opposite side of the surface. Mounting the Device NOTICE If you are mounting the device in fiberglass, when drilling the pilot holes, it to the location where you plan to mount the marine instrument. 3 If you experience difficulty during the installation, contact Garmin® Support...
Installation Instructions
Page 2
...In +) Green Rx/B (In -) NMEA 0183 Connection Diagrams This diagram is used only when connecting the marine instrument to a Garmin HVS GPS antenna. This wire is an example of the Technical Reference for the ...battery if the NMEA 2000 power cable is used only when connecting the marine instrument to a Garmin HVS GPS antenna. If you are replacing a legacy Garmin marine instrument that currently uses a NMEA data cable, you do not need to replace the quarter-turn locking ring with two Tx wires. 2 GMI 20 Installation Instructions Wind transducer GND 10 black box bridge Marine...
...In +) Green Rx/B (In -) NMEA 0183 Connection Diagrams This diagram is used only when connecting the marine instrument to a Garmin HVS GPS antenna. This wire is an example of the Technical Reference for the ...battery if the NMEA 2000 power cable is used only when connecting the marine instrument to a Garmin HVS GPS antenna. If you are replacing a legacy Garmin marine instrument that currently uses a NMEA data cable, you do not need to replace the quarter-turn locking ring with two Tx wires. 2 GMI 20 Installation Instructions Wind transducer GND 10 black box bridge Marine...
Installation Instructions
Page 3
... Humidity Actual pressure GMI 20 Installation Instructions 3 Item Description Marine instrument with a NMEA data cable (not included) NMEA 2000 network (must connect to the same ground as the NMEA data cable) Power source NMEA 0183 compliant device Item Garmin Wire Function Garmin Wire Color N/A N/A N/A N/A Rx/B (In -) Green Rx/A (In +) Brown NMEA 0183 Device Wire Function Power Power ground Data ground Tx This diagram is an...
... Humidity Actual pressure GMI 20 Installation Instructions 3 Item Description Marine instrument with a NMEA data cable (not included) NMEA 2000 network (must connect to the same ground as the NMEA data cable) Power source NMEA 0183 compliant device Item Garmin Wire Function Garmin Wire Color N/A N/A N/A N/A Rx/B (In -) Green Rx/A (In +) Brown NMEA 0183 Device Wire Function Power Power ground Data ground Tx This diagram is an...
Installation Instructions
Page 4
NMEA 0183 Information When connected to destination) DBT Depth below transducer DTM Datum being used without the express permission of Garmin Ltd. GMI 20 is a trademark of the National Marine Electronics Association. © 2014 Garmin Ltd. NMEA®, NMEA 2000®, and the NMEA 2000 logo are trademarks of Garmin. Sentence Description BOD Bearing (origin to an optional NMEA...
NMEA 0183 Information When connected to destination) DBT Depth below transducer DTM Datum being used without the express permission of Garmin Ltd. GMI 20 is a trademark of the National Marine Electronics Association. © 2014 Garmin Ltd. NMEA®, NMEA 2000®, and the NMEA 2000 logo are trademarks of Garmin. Sentence Description BOD Bearing (origin to an optional NMEA...