The E-TEC network interface is probably consuming only one or two LEN units of power Please review my primer on NMEA-2000 network construction and powering, which you will find atĪ basic network power node is usually fused at 3-Amperes, which is provides a capacity of 60 LEN. It is a bad practice to have the network powered by the network interface of a single device on the network. It sounds like he is looking for some other gear to blame for a problem with his product.ĮV-Diagnostic cables are currently SOLD OUT. If this is a support technician from the audio company making the device, you probably should as him what the LEN is of his device. But, again, the technician ought to know this and not be asking you to look it up for him.
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However, for any NMEA-2000 device that has its own power cord and gets its own power from another source, the LEN rating of the network interface is probably LEN = 1. Manufacturers of NMEA-2000 devices are supposed to publish the LEN rating of their devices, so to find the rest of the network devices LEN ratings, you would look up their specifications. he would realize that a lost connection between some sort of audio entertainment device ("the stereo'") and the NMEA-2000 network is not likely to be caused by the electrical power consumed from the network by the E-TEC engine's connection. he would realize that the EMM in an E-TEC probably has a very low LEN rating, and he would know where to find the LEN of any device himself, If the technician is really versed in NMEA-2000 networking, then: The technician that is asking you to dig up this information is also something of an enigma for me. My basis for this is the 133-Amperes of power generation contained in the E-TEC, the usual 40-Ampere-hour battery attached to it, and the notion that the host device, the EMM itself, is not in any way powered by the NMEA-2000 network. However, you can consider that it will be extremely low, probably LEN =1. I don't know of any published specification for the LEN of the E-TEC's EMM NMEA-2000 connection. View Member Profile Find Member's Topics Find Member's Posts jimh