For those of you who are not aware, NMEA is a standard backbone cabling system that allows you to connect every piece of electronic gear on. I was just reading an article on the NMEA 2000 marine network standard over at the excellent Ocean Navigator blog. An adapter such as the Actisense NGT-1-USB, Airmar U200 or Maretron USB100 is also required if NMEA 2000 messages are to be received by or transmitted from a PC. A Fundamental Danger Of NMEA 2000 Networks. These devices vary in which messages they will translate between the two networks. Examples include the Maretron USB-100, Simrad AT10 and Actisense's NGW-1. Networks on smaller vessels often are constructed entirely of Micro cable and connectors.Īn NMEA 2000 network is not electrically compatible with an NMEA 0183 network, and so an interface device is required to send messages between devices on the different types of network. The NMEA 2000 network operates on a 12-volt DC power connectors with positive and ground wires (with inline fuses for the positive wire) will allow you supply onboard power to the backbone of the network.
Mini cable is primarily used as a "backbone" (or "trunk") for networks of larger vessels (typically with lengths of 20 m and above), with Micro cable used for connections between the network backbone and the individual components. If a unit fails or is unresponsive the whole network still communicates information amongst the marine instruments connected. The smaller of the two sizes is denoted as "Micro" (or alternatively, "Thin") cable, and is rated to carry up to 3 Amperes of power supply current. The larger of the two sizes is unfortunately denoted as "Mini" (or alternatively, "Thick") cable, and is rated to carry up to 8 Amperes of power supply current. There are two sizes of cabling defined by the DeviceNet/NMEA 2000 standard. The DeviceNet standard defines levels of shielding, conductor size, weather resistance, and flexibility which are not necessarily met by other cabling solutions marketed as "NMEA 2000" compatible. Such cabling systems are permitted to be labeled "NMEA 2000 Approved". The only cabling standard approved by the NMEA for use with NMEA 2000 networks is the DeviceNet cabling standard, which is controlled by the Open DeviceNet Vendors Association.
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