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