Garmin GPSMAP 4208 - Marine GPS Receiver Technical Reference - Page 8

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Also for Garmin GPSMAP 4208 - Marine GPS Receiver: Important Safety Information (4 pages), Important Information (2 pages), Owner's Manual (2 pages), Installation Instructions Manual (19 pages), Installation Instructions Manual (25 pages), Installation Instructions Manual (25 pages), Quick Reference Manual (2 pages), Declaration Of Conformity (1 pages), Supplement Manual (24 pages)

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Garmin GPSMAP 4208 - Marine GPS Receiver Technical Reference
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. By using only the sides of the T-connectors to construct the backbone, you create
a linear construction to your NMEA 2000 network. T-connectors can be separated by backbone cables or connected directly together.
Although the male and female connectors on the T-connectors and backbone cables will fit on all sides of a T-connector, it is very important to
use only the top of the T-connector to attach NMEA 2000 devices, not to attach other T-connectors or backbone cables.
To NMEA 2000 devices
and power
Female
terminator
Male
Backbone extension cable
terminator
Correct Linear Backbone Construction
To NMEA 2000 devices
and power
T-connector
installed incorrectly
Male
terminator
Male
Backbone extension cable
(also installed
terminator
incorrectly)
Incorrect Linear Backbone Construction
Technical Reference for Garmin NMEA 2000 Products