Garmin NMEA 0183 Installation Instructions Manual page 11

NMEA 0183 Connection Exceptions
The orange accessory on wire is used when connecting the antenna to a Garmin chartplotter, or other NMEA
0183 device that has a defined accessory signal wire. If you are connecting the antenna to a device that does
not have an accessory signal wire, connect the orange wire from the antenna to ground and connect the
antenna power wire to the ignition or install an in-line switch. The antenna will drain the battery of the boat if it
is not switched.
• If your NMEA 0183 compliant device has only one receiving wire (Rx), connect it to the gray wire (Tx/A (Out
+)) from the antenna, and leave the white/red wire (Tx/B (Out -)) from the antenna unconnected.
• If your NMEA 0183 compliant device has only one transmitting wire (Tx), connect it to the white wire (Rx/A
(In +)) from the antenna, and connect the white/orange wire (Rx/B (In -)) from the antenna to ground.
Heading Calibration
After installation is complete, you must calibrate the heading and perform the auto heading alignment to
receive magnetic heading data.
CAUTION
11