Garmin GPSMAP 521 Technical Reference - Page 5

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Also for Garmin GPSMAP 521: Installation Instructions Manual (12 pages), Reference Manual (2 pages), Important Safety Information (48 pages), Instructions Manual (28 pages), Template (2 pages)

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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

For a glossary of commonly used NMEA 2000 terms, see

page

After you have installed your NMEA 2000 network, use the checklist on

page 37

to verify the installation.

Garmin uses NMEA 2000 micro connectors on units, sensors, and T-connectors that are compatible with other NMEA 2000 micro connectors,

cables, and NMEA 2000-compatible devices. Garmin sensors may be packaged with a drop cable and a T-connector. Garmin displays may also

include additional NMEA 2000 components (such as a power cable). The NMEA 2000 components included with a Garmin sensor or display

are listed in the product documentation. A diagram on the product box shows which NMEA 2000 components are included.

Sample Box Diagram (GFS 10)

In the sample box diagram, a complete NMEA 2000 network is shown, and the parts included with the sensor are shaded. In this example, a

T-connector is included with a Garmin GFS 10 fuel sensor. A NMEA 2000 power cable, terminators, an additional drop/backbone cable, and

additional T-connectors are not included with a GFS 10 fuel sensor. The GFS 10 fuel sensor, as shown by the shaded components in the box

diagram, is intended to be connected to an existing NMEA 2000 network on your boat. If you do not have a NMEA 2000 network on your boat,

this guide will help you assemble one.

Technical Reference for Garmin NMEA 2000 Products