Dealer CertificationDealer Certification

Section 3: Finalizing the NetworkSection 3: Finalizing the Network

Connecting to Other Data SourcesConnecting to Other Data Sources

Network SetupNetwork Setup

TroubleshootingTroubleshootingCopyright © 2011 NMEA

Connecting to Other Data Sources:Connecting to Other Data Sources:-NMEA 2000 to NMEA 0183-NMEA 2000 to NMEA 0183

NMEA 20000183 Gateway

DSC VHF

NMEA 2000 GPS information is sent to VHF radio for DSC broadcast

Connecting to Other Data Sources:Connecting to Other Data Sources:-NMEA 0183 to NMEA 2000 Gateways-NMEA 0183 to NMEA 2000 Gateways

Gateways can convert this data bi-directionally– NMEA 0183 to 2000 and NMEA 2000 to 0183

Important for older vessel installations– Existing & functioning NMEA 0183 installation on-board– Upgrading some (but not all) electronics on-board– Important data may only be available via NMEA 0183– EX- New NMEA 0183 Heading sensor installed last month

• This information that is needed on N2k network

Most DSC VHF Radios have NMEA 0183 I / O– Allows for DSC and AIS information on NMEA 2000

NMEA 20000183 Gateway

NMEA 0183 Multiplexer

Connecting to Other Data Sources:Connecting to Other Data Sources:-NMEA 0183 to NMEA 2000-NMEA 0183 to NMEA 2000

NMEA 0183 Wind Data

The gateway translates the NMEA 0183 data stream to a corresponding PGN.

These translated PGN’s will show up on the network.

NMEA 0183 device will not appear on the network, but the gateway does because it has a NMEA 2000 product code.

Connecting to Other Data Sources:Connecting to Other Data Sources:-NMEA 2000 to NMEA 0183 Gateways-NMEA 2000 to NMEA 0183 Gateways

Connecting to Other Data Sources:Connecting to Other Data Sources:-NMEA 2000 to Computers-NMEA 2000 to Computers

NMEA 2000USB Gateway

Sends NMEA 2000 data to a PC via USB connection.

Ideal for bringing data to Marine Software Programs– Device calibration- Transducer depth, speed, & temp offsets

For use with NMEA 2000 diagnostic PC Programs.– Analyze power distribution & PGN transmissions

Update firmware to NMEA 2000 devices on network.– Not all manufacturers support this feature

Connecting to Other Data Sources:Connecting to Other Data Sources:-NMEA 2000 to Computers-NMEA 2000 to Computers--USB Gateways--USB Gateways

Connecting to Other Data Sources:Connecting to Other Data Sources:-Engine Data on NMEA 2000 Bus-Engine Data on NMEA 2000 Bus

CertifiedGateway

Engine info to displays GPS info to engine

SmartCraft Gateway & Cable

NMEA 2000 Certification is Pending

Connecting to Other Data Sources:Connecting to Other Data Sources:-Engine Data on NMEA 2000 Bus-Engine Data on NMEA 2000 Bus

J 1939 Converter

Connecting to Other Data Sources:Connecting to Other Data Sources:-Engine Data on NMEA 2000 Bus-Engine Data on NMEA 2000 Bus

Connecting to Other Data Sources:Connecting to Other Data Sources:-Engine Data on NMEA 2000 Bus-Engine Data on NMEA 2000 Bus

Engine manufacturers do this differently Data protocols such as J1939 can be converted through

gateways Some manufacturers have NMEA 2000 certified

products for transferring engine data– Some connect directly to the bus as a device– See website for certified manufacturers

Network Setup:Network Setup:-PGN’s-PGN’s

Stands for Parameter Group Number. NMEA 2000’s version of an NMEA 0183 sentence

– Sentence structure is not the same– NMEA 2000 is binary, NMEA 0183 is ASCII– PGN’s & 0183 sentences have NO 1 to 1 correlation

A PGN defines the data coming from a device.

Most NMEA 2000 products output several PGN’s. Examples of PGN’s include Position, Heading etc. All PGN’s are defined in the NMEA 2000 spec.

Mandatory PGN’s – Define the device characteristics and are required by each

device– NMEA certifies the product to the mandatory PGN’s

Network Setup:Network Setup:-PGN’s-PGN’s

– The NMEA.org website has detailed information on all released PGN’s

– Easy lookup by PGN #, PGN name, or category

Network Setup:Network Setup:-PGN Information-PGN Information

– The full, released PGN list with detailed information is also available as a .pdf on the NMEA.org website.

Network Setup:Network Setup:-PGN Information-PGN Information

Network Setup:Network Setup:-PGN’s on Product Data Sheets-PGN’s on Product Data Sheets

Network Setup:Network Setup:-Selecting Data On a Display-Selecting Data On a Display

Allows a display to show various pieces of data from the network.Depth

Speed

Heading

Network Setup:Network Setup:-Viewing PGN Data On A Display-Viewing PGN Data On A Display

Network Setup:Network Setup:-Proprietary PGN’s-Proprietary PGN’s

May be used for device calibration & setup – Engine Calibration Parameters– Depth offsets– Water speed offsets– Heading Sensor Calibration

New, un-released PGN’s – Manufacturers can use these to get a leg up on the market

in anticipation of new technology.– NMEA 2000 committee reviews, approves, then publishes

Network Setup:Network Setup:-Device Instances-Device Instances

A numerical value which can be assigned to a device

Mandatory that every NMEA 2000 device has an instance number and the ability for a user to change this number.

Allows for installers to configure the network when multiple devices are outputting the same data– Dual transducers, one in the bow, one in the stern

– Dual GPS installations

– Fluid levels ( Fuel Tank A, Fuel Tank B, Water tank A, etc.)

Stbd. Fuel Tank-(Instance 5)

Water Tank- (Instance 1)

Holding Tank- (Instance 0)

Port Fuel Tank- (Instance 4)

Device Device InstancesInstances

Multi-Function Display

Fluid level page displaysFour fluid levels

Testing & Troubleshooting:Testing & Troubleshooting:-Checklist-Checklist

Total device network current draw does not exceed power supply current limit.

Voltage drop does not exceed limits

Less than 50 physical devices connected on the network.

No single drop over 6m (20 ft.)

Cumulative drop length does not exceed 78 meters

Testing & Troubleshooting:Testing & Troubleshooting:-Checklist (continued)-Checklist (continued)

Total network length does not exceed 100m (lite cable) or 250m (mid & heavy cable).

Terminating resistors are on each end of the trunk line and are properly connected

Network is grounded, at only one location, preferably in the center of the network 

All connections are inspected for loose wires or coupling nuts. Check for opens and shorts.

Testing and Troubleshooting:Testing and Troubleshooting:--Change ONE Variable at a Time!Change ONE Variable at a Time!

Loose connections– Check entire network

Voltage fluctuations & data errors– Poorly made field-attachable connectors– Open & check screw terminals & be sure heat shrink is over

the shield / drain wire(bare)

Devices not outputting specific PGN’s– Check manufacturers datasheets for PGN’s that are ON or

OFF by default

Not enough power insertion points (Power Tees)– Low power across the network due to voltage drops

Testing and Troubleshooting:Testing and Troubleshooting:-Termination Resistors-Termination Resistors

Check that termination resistors are properly connected at each end of the backbone– Measure the resistance on the communications pair.– Blue & White wires (Pins 4 & 5)– 60 ohms = OK – 120 ohms = missing one terminator. – 40 ohms or less = extra terminators on the network.

Testing and Troubleshooting: Testing and Troubleshooting: -Terminal Strip Tester (Shop-Made)-Terminal Strip Tester (Shop-Made)

Consists of a micro / lite male & female drop cable connected to a terminal strip

Simple way of tapping into a network Checks can easily be performed with a meter

Testing and Troubleshooting:Testing and Troubleshooting:--With Network Power ONWith Network Power ON

Pin/Signal Measurement Nominal Value

Tolerance

(2) PWR +

(RED)

Voltage Between PWR + and Pin (3) PWR- (Ground)

12 V to

13.84V

≥ 9 V to

≤ 15.75 V

Testing and Troubleshooting:Testing and Troubleshooting:--With Network Power OFFWith Network Power OFF

Pin/Signal Measurement Nominal Value

Tolerance

(5) CAN-H

(4) CAN-L

Resistance between CAN-H(Blue) and CAN-L(White)

60 Ω ≥ 54 Ω

≤ 71 Ω

End of Training PresentationsEnd of Training Presentations

ExamExam

Copyright © 2011 NMEA