Proper NMEA 2000 Installation IBEX 2012 Session 813

2y ago
11 Views
2 Downloads
3.85 MB
82 Pages
Last View : 1m ago
Last Download : 2m ago
Upload by : Raelyn Goode
Transcription

Proper NMEA 2000 InstallationIBEX 2012 Session 813Part IPhysical InstallationDave Morschhauser, Mystic Valley CommunicationsPete Braffitt, Gemeco

Overview What is NMEA 2000? What are its physical characteristics andlimits? What makes a good NMEA 2000 network? What makes a good NMEA 2000 networkfail?

NMEA 2000 Marine specific network for navigation,control, and monitoring CAN based, similar to J1939 Uses industrial quality cabling originallydeveloped for DeviceNET Certified products, based on standardcertification tool

NMEA 2000 Certification First certification program applicable torecreational marine electronic products Over 400 products certified to date Purpose: ensure products communicatecooperatively (plug and play) Based on common certification tool Cabling components are also approved

NMEA 2000

Typical rop Connection to device (FEMALE)- Accepts drop cable.

NMEA 2000 Single backbone cable snakes throughoutthe vessel No active network infrastructure to fail Standardized message structure and format– both generic and system specific messages Links vessel systems together– engines, navigation, power distribution, water& waste, etc.

NMEA 2000 Vessel Database

What can you do with NMEA 2000?

Physical Construction Building BlocksCharacteristicsPower AvailabilityOther considerations

NMEA 2000 Building BlocksPower Tee(s)Tee ConnectorsTermination ResistorsBackbone & Drop Cables

NMEA 2000 Building BlocksMini to MicroAdapterField InstallableConnectorsMini Backbonew/ Micro DropGenderChanger

NMEA 2000 CharacteristicsOverall: Capacity - 250K bits-per-second Interface operating range - 9 to 15 volts Logical network identities - 252 Minimum node separation - 0 meters Maximum bridged backbones - 10

NMEA 2000 CharacteristicsEach backbone: Length - 200 meters– 100 meters when using light cable Connected products - 50 Drop cable– 6 meters per drop– 78 meters total of all drops Power - limited by cable size and the number ofpower insertion points

NMEA 2000 kbone Length

Cable ConstructionShield BraidShield / DrainNET-SNET-CNET-HNET-LFoil -HDataWhiteNET-CPower -BlackNET-SPower Red

Product Power Sources

Cable niMax Length100 meters200 meters200 metersCapacity3 amp*4/8 amp*8* ampSignal WireGage24 AWG20 AWG18 AWGPower WireGage22 AWG16 AWG16AWG* Maximum power per backbone segment

NMEA 2000 Backbone

NMEA 2000 BackboneSingle BackboneTwo Segments

Power Sources Battery (nominally 12.0 VDC)– Allowed voltage drop 1.5 VDC Typical power supply (13.8 VDC)– Allowed voltage drop 3.0 VDC Maximum power supply (15 VDC)– Maximum allowed voltage drop 5.0 VDC

Other Considerations Products may be added to or removed fromthe backbone while operational No daisy-chaining ensures backboneremains intact when removing equipment Two terminators required, one at each endof the backbone

Making the Right Selections

Network Design Drivers Network power distribution– Segment voltage drop limit– Add power insertions points as needed Network topology– Keep it pure

Network Voltage Drop Straightforward application of Ohm’s LawE IxRwhereE voltage dropI circuit currentR wire resistance

Network Voltage Drop Wire resistanceR 2 x Length x Power Pair Resistance / 100 Network currentI LEN x 0.050 amp All togetherE 0.1 x LEN x L x 0.057 (Light)E 0.1 x LEN x L x 0.016 (Mid/ Heavy)

Estimated Length - Light7060VD 1.5 VoltsVD 3.0 l LENVD 5.0 Volts

Example Network5 LEN3 MetersTerminationResistor2 Meters6 Meters2 LEN6 Meters5 MetersTerminationResistor3 LEN6 Meters

Example Summary Total load 10 LEN Backbone length 13 meters Using light cable– Power pair resistance 0.057 Ω/meterE 0.1 x 10 x 13 x 0.057E 0.74 Volts

Estimated Length - Light7060VD 1.5 VoltsVD 3.0 VoltsVD 5.0 VoltsLEN 25Length 1840302010Length9688807264564840322416800Total LEN50

Network Layout ‘Trunk and Drop’ Topology Determine location for each product Determine path for trunk/backbone that:– Passes within 6 meters of each product– Total of all drops 78 meters Determine number and location of powerinsertion points

Network Layout

Layout Issues Multiple connections in confined spacesSailboat masts & powerboat towersGateways to other protocolsMultiple backbone configurations

Multiple Connectionsin Confined Spaces Multi-tap tee is used just like multiple tees Multi-drop splitter has some limitations

Multi-tap DropTerminationResistorTerminationResistorPower TeeDrop Cable(6 Meters max length)Drop Cable(x Meters)6-x Meters6-x Meters6-x Meters4-way TapMax length of each drop must be reduced by the length of the drop cablebetween the Tee and the multi-tap

Sailboat Masts Most masts are greaterthan 6 Meters Backbone termination atthe top of the mast In-Line terminationresistors are used Must be within 6 metersof last device Some manufacturers havea built-in terminationresistors on cables 6metersIn-LineTerminationResistorLocationMast backbonecable shown inorange forillustrationpurposes only.

GatewaysNMEA 2000 GPS information is sent toVHF radio for DSC broadcastTerminationResistorTerminationResistorDSC VHFNMEA 20000183 Gateway

GatewaysJ1939 data is converted and transmittedon the NMEA 2000 roprietary2000J1939GatewayGateway

NMEA 2000 Network Bridge Connect two networks 50 nodesBackbone 200 metersDrops 78 metersUseful For: Separate mastbackbone from main Separate criticalequipment Port/stbd redundancy

Power Insertion How many insertion points?Common reference pointConnect shield to RF ground only onceEach leg has only one power source –consecutive legs not connected– Risk of harmonics between power supplies– Risk of cumulative voltage drop exceedingcommon mode offset limits

Power InsertionShield/Drain leftunconnected at allother insertion points

Power Insertion Building Blocks

Testing

Testing Checklist Loose connections Voltage fluctuations & data errors– Voltage consistent and 9 VDC at all tees Correct termination– Approximately 60 Ω across data pair whenpower off No sustained error rate

Testing Checklist 50 connected products or lessDrops 6 meters or lessTotal drops 78 meters or lessNetwork 200 meters or lessAll power tap leads powered

Plug and Play Limitation Layout and power planning rules result inproducts communicating non-destructively Product configuration ensures datadisplayed is data intended Manufacturer configurability may vary New Label and Configuration messages willunify methods in use

Acknowledgementsand Contact InformationPhotos courtesy of Airmar, Actisense, Garmin, LTW,Maretron, Molex, TurckDiagrams courtesy NMEAContact Information:David lutions.com

NMEA Software Utilities

Actisense NMEA Reader The Actisense NMEA Reader is a great utility for testing and evaluating a NMEA 0183or NMEA 2000 system. The program is free to download from the Actisense web site and will work greatwith a compatible serial or USB adapter. This software will allow the user to view real time data flow and buffer rates. Certain Actisense gateways can be programmed by this software such as the NGW-1and NGT-1. Manufacturer and LEN numbers can be obtained from this software for certain NMEA2000 devices.

Actisense NMEA ReaderActisense NGT-1-USB The Actisense NGT-1-USB is a great product to deliver NMEA 2000 datadirectly into the PC for use with the NMEA Reader Software.

Actisense NMEA Reader The NMEAReader is a goodutility to readwhat sentencesare located onthe network. The data shownincludes thespecific PGN,Sentence Name,Transmit Intervaland the actualdata itself.

Actisense NMEA Reader The top selecteditem shows thecom port,description andbaud rate of theavailable NMEA0183 or NMEA2000 Device.

Actisense NMEA Reader The intervalshows how oftenthe data is beingsent from thedevice. Thisallows the user toknow how fast asender istransmitting.

Actisense NMEA Reader Pictured here arethe details ofeach individualdata PGN.This will list whatdata is present onthe specificdevice as well aswhat makes upthe sentencestructure.Also located onthis page is theNMEA 2000 BusLoad as well asthe PC Loadthrough theGateway.

Actisense NMEA Reader The bus load canbe used to checkhow manydevices on thenetwork. If the NMEA2000 network isnot functioningcorrectly it couldbe due to excessload or adefective sender. The NMEA 0183version allows forthe same reading.

Actisense NMEA Reader

Actisense NMEA Reader This item showswhich instance isassigned to thedevice allowingfor the user tomatch it on thedisplay. Also pictured arethe serial numberand functionwhich can behelpful foridentification ofthe device.

Actisense NMEA Reader

Sail Soft NEMA Studio The Sail Soft program will allow data to be sent from a PC via NMEA 0183 on a user selected Com Port. This will allow for testing of displays or networks by sending out select amounts of data which iscontrolled through the software. The data that is being transmitted via NMEA 0183 can then be converted to NMEA 2000 using eitheran NGW-1, AT-10 or any other NMEA approved device.

Sail Soft NEMA StudioActisense NGW-1 The Actisense NGW-1 is a great way to convert the data sent from the Sail Softprogram into a NMEA 2000 Format. It can also send AIS information into aBus with the proper Firmware update provided from the Actisense website.

Sail Soft NEMA Studio

Sail Soft NEMA Studio

Sail Soft NEMA Studio

Maretron N2KAnalyzer The Maretron N2KAnalyzer Software is free to download from the Maretron Web siteand offers many valuable options for network evaluation and testing. The N2KAnalyzer requires the use of a Maretron USB100 Gateway to properly connectto a NMEA 2000 system. Maretron’s software will allow a user to assign device instances to components directly. The software also shows software version, manufacturer, serial numbers and muchmore data specific to a sensor.

Maretron N2KAnalyzerUSB100 Gateway The Maretron USB100 Gateway will allow the NMEA 2000 network to be accessed bythe N2KAnalyzer to show what devices are attached. The Gateway will also allowdevices to be programmed for instances and queried for transmitted and received PGN’s.

Maretron N2KAnalyzerN2KAnalyzer Software Device Page The Main Device page will show what devices are connected to the Network and the specific information ofthat device.

Maretron N2KAnalyzerN2KAnalyzer Software Device Page The unique instance tab allows for the user to view and assign specific instances to a sender if there aremultiple versions of the same unit on the network.

Maretron N2KAnalyzerN2K Analyzer Software Device Page The Instancing tool is as simple as setting the number for any applicable device.

Maretron N2KAnalyzerN2KAnalyzer Software Properties PageThe PGN Pageshows alltransmitted andreceived sentencesto ensure properoperation.

Maretron N2KAnalyzerN2KAnalyzer Software Properties PageThe Received PGNPage shows thespecifics of whatdata is being sentand specifics ofthat data.

Maretron N2KAnalyzerN2KAnalyzer Software Properties PageThe transmitted PGN Page will allow for the user to view the live data comingfrom a sensor which will show if it is actually transmitting and if the data iscorrect.

Maretron N2KAnalyzerN2KAnalyzer Software Properties PageN2KAnalyzer alsooffers the ability tosimulate a DSM250display throughthe software toview live data aswell as changesettings just as if alive display wereonboard.

Maretron N2KBuilderN2KBUILDER NMEA 2000 NETWORK DESIGN SOFTWARE Maretron’s unique N2KBuilder program allows dealers andinstallers to design and test networks before any cable ispulled through the vessel. The software will calculate voltage drop, connector gender,and cable lengths as well as allow the use of customparameters to meet most design needs. When used properly, a configuration file can be generated tocreate a bill of material that will include all Maretron partsused in the build that makes ordering parts much moreefficient.

Maretron N2KBuilder

Maretron N2KBuilder

Maretron N2KBuilder This build file shows a system where the end user supplies specifics to be used togenerate a complete network. It is a useful program to start a system and explainto customers not familiar with NMEA 2000 how the parts are utilized.

Maretron N2KBuilder Attached is a detailed view of how the system can be used to partition specific sections of avessel and show possible connection and integration points. The more detailed acustomer’s requirements are, the more data can be added to the builder file. This alsohelps generate a very specific BOM to give an accurate estimate of what parts will berequired as well as total component cost.

Maretron N2KBuilder The Bill of Materials that isgenerated from the Builderfile is an excellent way tocontrol cost of the build aswell as to generateequipment costs for a job.

Maretron N2KMeter The N2KMeter has thecapability to test the physicalaspects of a network. Faults that can be detected bythe N2KMeter include: Opens and Shorts Incorrect Topology Bad Nodes Bad Termination Improper Shield Connection Intermittent Problems Excessive Scan Rate Common Mode Voltage

Maretron N2KMeter The meter offers the ability touse an Auto-Search tool thatwill allow the dealer to locatefaults. It works by examining allmeasurements and thenpinpointing any that exceedor are close to specifiedlimits. The N2KMeter tracks networkdata transmission errors inreal-time and lets you know ifthe error rate is acceptable,marginal or unacceptablewith the use of a simple signalinterface.

Maretron N2KMeter The automated errordetection of the N2KMeterallows the user to view issueson the backbone live. The technician will be able todetermine if the error was anisolated event or if it isrecurring which wouldindicate a problem on theNMEA 2000 network. The error detection will scrollnumerically as issues arisefrom the time it is connectedto a node.

Maretron N2KMeter Any error rate greater thanzero is undesirable (althoughyour network may stillfunction since CANautomatically retransmitsafter errors). An error rate greater than10/s indicates a problem thatshould be investigated. The N2KMeter uses uniquetechnology to accuratelydetermine which node wasattempting to transmit whena bus error occurs.

Backbone termination at the top of the mast In-Line termination resistors are used Must be within 6 meters of last device Some manufacturers have a built-in termination resistors on cables 6 meters In-Line Termination Resistor Location Mast backbone cable shown in orange for illustration purposes only.

Related Documents:

iBex can cancel the warranty with 10 days notice if a payment is missed and 30 days notice due to material misrepresentation. In the event you threaten to harm or actually harm the safety or well-being of: (i) iBex Home Warranty; (ii) any employee of iBex Home Warranty; (iii) a Service Contractor; or (iv) any property of iBex

Maretron NMEA 2000 Network Installation Guide Installing an NMEA 2000 Network Installing an NMEA 2000 network consists of interconnecting NMEA 2000 electronic devices using plug-and-play cables and connectors. The following pages provide a brief

-NMEA 2000 —Connect the sensor(s) to the NMEA 2000 network. NOTE: When an external speed sensor is connected to both an NMEA 0183 device and an NMEA 2000 network, the WeatherStation Instrument will use NMEA 2000 data. Speed-through-water sensor—An external speed sensor can be installed, such as a

NMEA 2000 —Connect the sensor(s) to the NMEA 2000 network. NOTE: When an external speed sensor is connected to both an NMEA 0183 device and an NMEA 2000 network, the WeatherStation Instrument will use NMEA 2000 data. Speed-through-water sensor—An external speed sensor can be installed, such as a

Alpine Ibex hunting in Switzerland Highlights: We have a unique opportunity of hunting for the most prestigious Alpine Ibex in Switzerland and Austria. Ibex hunt in Europe is a real treat for the mountain enthusiasts. The Swiss Ibex is the rarest and most robust bodied subspecies. It has impressive size horns that can reach the 100-110cm length.

Hunting Marco polo and Ibex in Kyrgyzstan Kyrgyzstan is a small landlocked country in Central Asia bordered by Kazakhstan to the north, Uzbekistan to the west, Tajikistan to the south and China to the east. Kyrgyzstan has long been renowned for its mid Asian ibex or Tian Shan ibex as it is sometimes called. There are also 3 subspecies of Argali

Hi). The CEU contains all but one of the high voltage power supplies (the last is integral to IBEX-Lo), support electronics for both sensors, and the digital data processing unit for the entire payload. The CEU also includes data storage for the entire IBEX spacecraft. The principle of operation for the two sensors is the same2 and is .

TURKEY The Bezoar Ibex is the largest of the members of the ibex family and Turkey is one of the only countries where you can hunt this impressive ibex. Difficult hunt Requires good level of fitness Accommodation in a house Mountain Hunt Spot-and-Stalk Hunt Tel.: ( 45) 62 20 25 40 www.diana-hunting.com info@diana.dk