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The LEN is given as a whole number and provides a quick overview of the power distribution and helps to avoid unwanted voltage losses and resulting malfunctions in the backbone. This factor indicates how much power the device needs from the NMEA network and thus helps to calculate how many devices can be integrated into an NMEA2000 system, depending on the power requirements of the devices and the cable length of the network. A lot of money for a couple of cables, but Suzuki have you over a barrel. You also need an ‘SMIS to SDS adaptor’ (49.95. NMEA 2000 network is made up of lots of components, but they can be classified into five major components: Physical Layer-This layer defines the electrical and mechanical aspects of the physical link between network connections and references the characteristics of the devices and network interfaces to be used in NMEA 2000. ) to connect the engine to the NMEA network. Instead you need: an ‘SMIS engine interface cable’ (106.02. LEN stands for Load Equivalency Number and refers to the load factor of a device in the network. However you can’t just attach a NMEA 2000 cable. The best way to do this is to place the power supply in the middle of the network.Īn important term in this context is the so-called LEN value. It is recommended to connect the NMEA2000 network power supply so that the network is evenly loaded. In any case, make sure that the backbone is terminated at both ends with a terminal resistor. Assuming the voltage distribution is correct, the backbone or the master cable (depending on the type of cable) must not be longer than 200 m. When planning your network, make sure you keep in mind the maximum possible length of backbone cables.
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Set up the NMEA2000 network backbone / master cable Information can usually be found in your product‘s respective operating instructions. Before you connect twoĭevices to an NMEA2000 network, you should check whether their PGN (data sets) are compatible. Number and is used to identify the NMEA2000 data sets. The abbreviation PNG stands for Parameter Group