NMEA 2000 Technical Reference Guide for Garmin Marine Devices

Garmin® has created an NMEA 2000 Technical Reference for all NMEA 2000 products made by Garmin. The Technical Reference for Garmin NMEA 2000 Products manual is searchable on the Marine Support Center's manuals pages. 

This document will provide basic and advanced installation instructions for the NMEA 2000 network. It will also provide details (i.e., LEN number, PGN data supported) about all Garmin NMEA 2000 devices and accessories.

Here is a direct link to the Technical Reference.