Lowrance nmea 2000 general information pamplet 用户手册

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The NMEA 2000 Network DeviceNet is the communication bus stan-

dard developed by the National Marine Electronics Association 

(NMEA) for use in boats. Lowrance has introduced a line of products 

that can communicate over a NMEA 2000 network, helping you get the 

most out of this technology. 
This instruction sheet will show how a NMEA 2000 network is created, 

configured and installed.  
Read the next few pages to become familiar with some of the following 

terms: NMEA 2000 Network/LowranceNET, NMEA 2000 Bus/Network 

Bus, Network Backbone, Network Nodes and Linear Architecture.  

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A NMEA 2000 network is a communications link between two or more 

devices that transfer NMEA 2000 information. LowranceNET is the 

NMEA 2000 networking system developed by Lowrance Electronics. A 

NMEA 2000 network functions like the phone wiring in a house. If, for 

example, you pick up a phone in the living room you will be able to 

hear the conversation someone is having on a phone in the bedroom.  
In similar fashion, a NMEA 2000 network allows multiple display units 

to receive data from a GPS antenna or multiple sonar units to receive 

messages sent by a temperature sensor. A NMEA 2000 network gives 

you the flexibility to view engine diagnostics and fuel level data on digi-

tal gauges or display units located anywhere on your boat. 
If you have a Lowrance display unit with a LGC-3000 GPS module in-

stalled, you have a NMEA 2000 network. The connectors and cables 

that came with your LGC-3000 function as a dedicated NMEA 2000 

network, passing GPS data along the network to the GPS display unit. 

This is a simple form of a NMEA 2000 network.   
On the other end of the scale is a large network bus. You can easily ex-

pand a network bus by adding multiple NMEA 2000 devices, even add-

ing the same type of device more than once.  
The network could share information with a sonar-GPS combo unit 

mounted in the dash, a sonar-only unit mounted at the stern and an-

other display unit mounted on the bow. In that scenario, all three dis-

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