National Marine Electronics Association NMEA 2000 Network and

National Marine Electronics Association NMEA 2000 Network and

National Marine Electronics Association NMEA 2000 Network and Other Marine Networks Why NMEA 2000 June 2005 National Marine Electronics Association www.nmea.org Sampling of Networking Systems HSB2, Magic Bus, Marine Network, N2, NavNet, SeaTalk, SimNet,

SmartCraft NMEA 0183 (not a network, a serial interface) NMEA 2000 National Marine Electronics Association www.nmea.org Proprietary Manufacturer Networking Systems (sampling) HSB2, Marine Network, N2, NavNet, SeaTalk, SimNet, SmartCraft Communicate among themselves No sharing of others data National Marine Electronics Association

www.nmea.org NMEA Standards Serve the public safety Developed from manufacturers, private and government organizations, dealers and equipment operators Goals: 1. Facilitate the public interest in the interconnection and interchangeability of equipment 2. Minimize misunderstanding and confusion between manufacturers 3. Assist purchasers in selecting compatible equipment

National Marine Electronics Association www.nmea.org NMEA 0183 (Ver. 3.01) Standard Is a serial data interface Operates at 4.8 kilobits/sec Delivers 6-8 messages (sentences)/sec Terrific for simpler applications Device to device connectivity International Electrotechnical Commission (IEC) 61162-1 is harmonized with NMEA 0813 National Marine Electronics Association www.nmea.org NMEA 0183 (Ver. 3.01) Standard

Single talker multi-listener Universal method for data exchange between two devices Recommends a physical layer Complicated installation and setup Open to miss-interpretation National Marine Electronics Association www.nmea.org NMEA 0183 (Ver. 3.01) Simplified Circuit Single Talker / Multi - Listener GPS (talker) "A" "B"

Shield "A" "B" To other devices Shield (talker) (listener) (listener) RADAR National Marine Electronics Association www.nmea.org

Chart Plotter NMEA 0183 HS Standard Operates at 38.4 K baud (0183 operates at 4.8K baud) Sentences are compatible International Electrotechnical Commission (IEC) 61162-2 is harmonized with NMEA 0813 HS National Marine Electronics Association www.nmea.org NMEA 2000 Standard Open Network System Based

on CAN (Controller Area Network) Developed by a myriad of industries under NMEA guidance Academia Kansas and Oklahoma State Networking and Computer Industry U.S. Coast Guard Research and Development 40 organizations for 5 years National Marine Electronics Association www.nmea.org NMEA 2000 Standard Beta Tested 12 electronic manufacturers and the U.S. Coast Guard under the guidance of NMEA

Furuno USA, JRC, Litton Marine, Navionics, Northstar, Raymarine, Simrad, Teleflex, Trimble, Wood Freeman Kvaser, Vector Can Tech (CAN Companies) National Marine Electronics Association www.nmea.org NMEA 2000 Standard Complete network protocol Open standard for electronics, electrical and engine data all on the same network Exchange of data between multiple manufacturers equipment simultaneously Marine manufacturers collaborating and creating an open network enviornment Entrepreneurs developing NMEA 2000

diagnostic tools National Marine Electronics Association www.nmea.org NMEA 2000 Standard Mandates a physical layer Real-time data stream (single cable) Standard connectors and cables International Electrotechnical Commission (IEC) 61162-3 is NMEA 2000 National Marine Electronics Association www.nmea.org NMEA 2000 Standard Built on the OSI Model

Physical Layer Data Link Layer Network Management Application Layer National Marine Electronics Association www.nmea.org NMEA 2000 Standard Mandates Physical Layer Cables Connectors Terminators Power

National Marine Electronics Association www.nmea.org NMEA 2000 Standard Physical Layer Network Length Light < 100m (328ft) 4 Amps Heavy 200m (656ft) 8 Amps Drop 6m (19ft) National Marine Electronics Association www.nmea.org NMEA 2000 Standard Connectors Network Drop Cable to Device Female

Available in Two Sizes Micro (light) and Mini (heavy) Female Female Network Cable National Marine Electronics Association www.nmea.org Network Cable NMEA 2000 Standard Standard cables and connectors Simple installation for adding a device

"Plug and Play Waterproof Screw on connectivity Cable and connectors will not come apart Data and Power with one cable National Marine Electronics Association www.nmea.org NMEA 2000 Simplified Circuit Multi - Talker / Multi - Listener Terminating Resistor + VDC Gnd

Shield NMEA 2000 Device Backbone Cable Tap (T-connector or barrier strips) Power Supply Connection National Marine Electronics Association www.nmea.org NMEA 2000 Device

Terminating Resistor Drop Cable NMEA 2000 Simplified Network For Example Only Trunk Termination Resistor NMEA 2000 To/from RS232 Gateway

Wind Sensor Display Radar GPS Laptop Speed Transducer Compass Engine Monitor Depth Transducer

Battery Drop Line Tee Connector Trunk Line National Marine Electronics Association www.nmea.org NMEA 2000 To/from NMEA 0183 Gateway Trunk Termination Resistor

NMEA 0183 Instrument (real installation in most cases will be different) NMEA 2000 Standard Multi-Talker + Multi-Listener Multi-Master, No Single Controller Single Channel Parallel Bus 250 Kbits/sec (50 times faster than 0183) 200 Meter Length 50 Physical Nodes National Marine Electronics Association www.nmea.org

NMEA 2000 Standard CAN (Controller Area Network) Develop by Intel and Bosch Used in control processes for industrial applications Used in automotive Used in factory automation National Marine Electronics Association www.nmea.org NMEA 2000 Standard Why CAN? Proven robust error free protocol Automatically determines repeated errors

Will take node off line to protect network Priority messaging embedded Collision avoidance bit wise arbitration Critical messaging always gets thru National Marine Electronics Association www.nmea.org NMEA 2000 Standard CAN vs. Ethernet Can Ethernet Lower Higher

Bandwidth Low High (Radar, Video) Collision Avoidance Yes No Avoidance (Collision Detection)

Message Yes No Power Consumption National Marine Electronics Association www.nmea.org NMEA 2000 Standard Certification of Products Products must meet strict certification process Assure products meet the standards

To assure products will operate on the network properly and behave predictably Products must be tested by NMEA Only products that have been certified can use the LOGO National Marine Electronics Association www.nmea.org

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