- ページ 7

船舶用GPSシステム Garmin GPSMAP 421のPDF テクニカル・リファレンスをオンラインで閲覧またはダウンロードできます。Garmin GPSMAP 421 42 ページ。 Marine navigation equipment
Garmin GPSMAP 421 にも： 取付説明書 (12 ページ), リファレンス・マニュアル (2 ページ), 重要な安全情報 (48 ページ), 取付説明書 (28 ページ), テンプレートマニュアル (2 ページ), 適合宣言 (1 ページ)

ページを印刷する
Garmin GPSMAP 421 テクニカル・リファレンス

Building a NMEA 2000 Network

The main communication channel of a NMEA 2000 network is a backbone to which your NMEA 2000 devices connect. Each NMEA 2000
device connects to the backbone with a T-connector. The NMEA 2000 backbone must be connected to power, and terminators must be installed
at both ends for the network to function correctly.
When you design a NMEA 2000 network, start by creating a diagram of the network. When creating the diagram, be as detailed as possible:
•
Include all of the devices you intend to connect to your network
•
Note the approximate location of the backbone and devices on your boat
•
Measure the distances between devices and the backbone, as well as the overall length of the backbone
•
Note the power consumption of each device (Load Equivalency Number)
Intelligent transducer
Female
terminator
Note: This diagram illustrates the NMEA 2000 data connections to each device or sensor. Some devices or sensors can be powered by the NMEA
2000 network; others may require a separate power connection. Consult the installation instructions for each device you connect to your NMEA 2000
network to be sure you supply power to the device appropriately.
When building a NMEA 2000 network, you must follow certain rules to make sure your NMEA 2000 network functions correctly. Be sure to
understand the following concepts:
•
Linear backbone construction
•
Power connection and distribution
•
Proper termination
(page
•
Cable length and device limits
Technical Reference for Garmin NMEA 2000 Products
Fuel sensor
Ignition or
in-line switch
+
Battery - 12 Vdc
Backbone extension cable
Sample NMEA 2000 Network
(page
4)
(page
5)
7)
(page
8)
Marine instrument
Fuse
-
Power cable
NMEA 2000 backbone
NMEA 2000 Fundamentals
Chartplotter
Drop cable
T-connector
Male
terminator