Maretron USB100 Manuel d'utilisateur

Proper NMEA 2000 Installation IBEX 2012 Session 813 Part I Physical Installation Dave Morschhauser, Mystic Valley Communications Pete Braffitt, Gemeco

Physical Construction • Building Blocks • Characteristics • Power Availability • Other considerations

NMEA 2000 Building Blocks Power Tee(s) Tee Connectors Termination Resistors Backbone & Drop Cables

NMEA 2000 Building Blocks Mini to Micro Adapter Mini Backbone w/ Micro Drop Gender Changer Field Installable Connectors

NMEA 2000 Characteristics Overall: • Capacity - 250K bits-per-second • Interface operating range - 9 to 15 volts • Logical network identities - 252 •

NMEA 2000 Characteristics Each backbone: • Length - 200 meters – 100 meters when using light cable • Connected products - 50 • Drop cable – 6 meters

NMEA 2000 Terminology Backbone Length Drop Length Power Insertion Point Backbone Length Segment

Cable Construction Shield / Drain NET-S NET-C NET-H NET-L Name Pair Color Shield Drain Bare NET-L Data Blue NET-H Data White NET-C Power - B

Product Power Sources

Cable Types Style Light Mid Heavy Connectors Micro Micro/Mini Mini Max Length 100 meters 200 meters 200 meters Capacity 3 amp* 4/8 amp* 8*

NMEA 2000 Backbone

Overview • What is NMEA 2000? • What are its physical characteristics and limits? • What makes a good NMEA 2000 network? • What makes a good NMEA 2000

NMEA 2000 Backbone Single Backbone Two 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 • Max

Other Considerations • Products may be added to or removed from the backbone while operational • No daisy-chaining ensures backbone remains intact whe

Making the Right Selections

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

Network Voltage Drop • Straightforward application of Ohm’s Law where E = voltage drop I = circuit current R = wire resistance E = I x R

Network Voltage Drop • Wire resistance • Network current • All together R = 2 x Length x Power Pair Resistance / 100 I = LEN x 0.050 amp E = 0.1 x

Estimated Length - Light 010203040506070081624324048566472808896LengthTotal LENVD = 1.5 VoltsVD = 3.0 VoltsVD = 5.0 Volts

Example Network 2 Meters 5 Meters 6 Meters 3 LEN 6 Meters 2 LEN 6 Meters 5 LEN 3 Meters Termination Resistor Termination Resistor

Example Summary • Total load = 10 LEN • Backbone length = 13 meters • Using light cable – Power pair resistance = 0.057 Ω/meter E = 0.1 x 10 x 13 x 0.

NMEA 2000 • Marine specific network for navigation, control, and monitoring • CAN based, similar to J1939 • Uses industrial quality cabling originally

Estimated Length - Light 010203040506070081624324048566472808896LengthTotal LENVD = 1.5 VoltsVD = 3.0 VoltsVD = 5.0 VoltsLEN = 25 Length = 18

Network Layout • ‘Trunk and Drop’ Topology • Determine location for each product • Determine path for trunk/backbone that: – Passes within 6 meters of

Network Layout

Layout Issues • Multiple connections in confined spaces • Sailboat masts & powerboat towers • Gateways to other protocols • Multiple backbone conf

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

Multi-tap Drop Power Tee 4-way Tap Drop Cable (6 Meters max length) Drop Cable (x Meters) 6-x Meters 6-x Meters 6-x Meters Termination Resistor Ter

Sailboat Masts • Most masts are greater than 6 Meters • Backbone termination at the top of the mast • In-Line termination resistors are used • Must b

Gateways NMEA 2000 0183 Gateway DSC VHF NMEA 2000 GPS information is sent to VHF radio for DSC broadcast Termination Resistor Termination Resistor

Gateways NMEA 2000 J1939 Gateway J1939 data is converted and transmitted on the NMEA 2000 Network Termination Resistor Termination Resistor Proprieta

NMEA 2000 Network Bridge • Connect two networks • > 50 nodes • Backbone > 200 meters • Drops > 78 meters • Separate mast backbone from main •

NMEA 2000 Certification • First certification program applicable to recreational marine electronic products • Over 400 products certified to date • Pu

Power Insertion • How many insertion points? • Common reference point • Connect shield to RF ground only once • Each leg has only one power source – c

Power Insertion Shield/Drain left unconnected at all other 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 –

Testing Checklist • 50 connected products or less • Drops 6 meters or less • Total drops 78 meters or less • Network 200 meters or less • All power ta

Plug and Play Limitation • Layout and power planning rules result in products communicating non-destructively • Product configuration ensures data dis

Acknowledgements and Contact Information Photos courtesy of Airmar, Actisense, Garmin, LTW, Maretron, Molex, Turck Diagrams courtesy NMEA Contact In

NMEA Software Utilities

Actisense NMEA Reader • The Actisense NMEA Reader is a great utility for testing and evaluating a NMEA 0183 or NMEA 2000™ system. • The program is

NMEA 2000

• The Actisense NGT-1-USB is a great product to deliver NMEA 2000™ data directly into the PC for use with the NMEA Reader Software. Actisense NMEA Rea

Actisense NMEA Reader • The NMEA Reader is a good utility to read what sentences are located on the network. • The data shown includes the specific P

Actisense NMEA Reader • The top selected item shows the com port, description and baud rate of the available NMEA 0183 or NMEA 2000™ Device.

Actisense NMEA Reader • The interval shows how often the data is being sent from the device. This allows the user to know how fast a sender is transm

Actisense NMEA Reader • Pictured here are the details of each individual data PGN. • This will list what data is present on the specific device as wel

Actisense NMEA Reader • The bus load can be used to check how many devices on the network. • If the NMEA 2000™ network is not functioning correctly i

Actisense NMEA Reader

Actisense NMEA Reader • This item shows which instance is assigned to the device allowing for the user to match it on the display. • Also pictured ar

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 t

Typical Tee Drop Connection to device (FEMALE)- Accepts drop cable. MALE Backbone Connection FEMALE Backbone Connection

• The Actisense NGW-1 is a great way to convert the data sent from the Sail Soft program into a NMEA 2000™ Format. It can also send AIS information i

Sail Soft NEMA Studio

Sail Soft NEMA Studio

Sail Soft NEMA Studio

• The Maretron N2KAnalyzer Software is free to download from the Maretron Web site and offers many valuable options for network evaluation and testing

Maretron N2KAnalyzer • The Maretron USB100 Gateway will allow the NMEA 2000™ network to be accessed by the N2KAnalyzer to show what devices are attach

• The Main Device page will show what devices are connected to the Network and the specific information of that device. Maretron N2KAnalyzer N2KAnalyz

• The unique instance tab allows for the user to view and assign specific instances to a sender if there are multiple versions of the same unit on the

• The Instancing tool is as simple as setting the number for any applicable device. Maretron N2KAnalyzer N2K Analyzer Software Device Page

Maretron N2KAnalyzer N2KAnalyzer Software Properties Page The PGN Page shows all transmitted and received sentences to ensure proper operation.

NMEA 2000 • Single backbone cable snakes throughout the vessel • No active network infrastructure to fail • Standardized message structure and format

Maretron N2KAnalyzer N2KAnalyzer Software Properties Page The Received PGN Page shows the specifics of what data is being sent and specifics of that d

Maretron N2KAnalyzer N2KAnalyzer Software Properties Page The transmitted PGN Page will allow for the user to view the live data coming from a sensor

Maretron N2KAnalyzer N2KAnalyzer Software Properties Page N2KAnalyzer also offers the ability to simulate a DSM250 display through the software to vie

Maretron N2KBuilder • Maretron’s unique N2KBuilder program allows dealers and installers to design and test networks before any cable is pulled throug

Maretron N2KBuilder

Maretron N2KBuilder

Maretron N2KBuilder • This build file shows a system where the end user supplies specifics to be used to generate a complete network. It is a useful

Maretron N2KBuilder • Attached is a detailed view of how the system can be used to partition specific sections of a vessel and show possible connectio

Maretron N2KBuilder • The Bill of Materials that is generated from the Builder file is an excellent way to control cost of the build as well as to gen

Maretron N2KMeter • The N2KMeter has the capability to test the physical aspects of a network. • Faults that can be detected by the N2KMeter includ

NMEA 2000 = Vessel Database

Maretron N2KMeter • The meter offers the ability to use an Auto-Search tool that will allow the dealer to locate faults. • It works by examining all m

Maretron N2KMeter • The automated error detection of the N2KMeter allows the user to view issues on the backbone live. • The technician will be able t

Maretron N2KMeter • Any error rate greater than zero is undesirable (although your network may still function since CAN automatically retransmits afte

What can you do with NMEA 2000?