Step 2: Connect the GXM 51 Antenna to Your NMEA 2000 Network

The GXM 51 is packaged with a NMEA 2000 T-connector and a NMEA 2000/audio cable. You will use these two components to connect the GXM 51 to your existing NMEA 2000 network. If you do not have an existing NMEA 2000 network, you will need to install a NMEA 2000 network on your boat. For more information on NMEA 2000, visit www.garmin.com.

To connect the GXM 51 to your existing NMEA 2000 network:

 

1. Determine an appropriate

 

location to connect the

GXM 51

GXM 51 to your existing

antenna

NMEA 2000 backbone.

 

2.Disconnect one side of a NMEA 2000 T-connector from

the backbone nearest to the

 

 

NMEA 2000

location where you want to

 

 

 

 

device

connect the GXM 51 antenna.

NMEA 2000

 

NMEA 2000/

(not included)

 

If you need to extend the

device

 

audio cable

 

NMEA 2000 backbone,

(not included)

 

(included)

 

connect an appropriate

T-connector

 

NMEA 2000 backbone

 

extension cable (not included)

(included)

To boat

 

to the side of the T-connector

 

 

 

audio

 

you disconnected.

 

 

 

3. Connect the included

 

 

 

T-connector in the NMEA

 

 

 

2000 backbone.

 

 

 

4. Route the NMEA 2000 portion

 

 

 

of the NMEA 2000/audio cable

 

 

 

from the GXM 51 antenna to

Existing NMEA 2000 network

 

the top of the T-connector you

 

(not included)

 

added to your NMEA 2000

 

 

 

network.

 

 

 

The 19 ft., 6 in. (6 m) NMEA 2000 portion of the NMEA 2000/audio cable is the maximum length for a drop cable as defined by the NMEA 2000 standards. If more cable is needed, add an extension to your NMEA 2000 backbone, based on the NMEA 2000 guidelines.

Step 3: Connect the GXM 51 Audio Cable

To hear XM Radio through the stereo on your boat, connect the audio adapter cable to the audio portion of the NMEA 2000/audio cable and to an audio input on the stereo. Refer to the manual provided with your stereo for audio input installation and operation.

Step 4: Update Your Chartplotter

To ensure compatibility with the GXM 51, upgrade your Garmin chartplotter with the latest software. A GPSMAP 4/5000 series chartplotter must be at software v5.0 or later to use the GXM 51. For more information, visit http://www8.garmin.com/support/download.jsp.

GXM 51 Installation Instructions