However, the QPD has been discontinued, although there are many still in the supply chain and this is not the sort of product where you have worry about updates.īut how about that simple yet fully split A2K-MPT-1 Micro Power T-Piece? It will certainly get the job done, but also leads to an extra subtle N2K gender issue. Or at its simplest, just two T-pieces connected together. On a large yacht this could be made up of multiple cables connected in series running through the whole vessel. Meanwhile, the two QPD Quick Power Drop models, which I discussed in 2012 along with other N2K network details, offer dual power entries and split feeds along with other QNB goodies like reverse polarity and data activity LEDs, as shown in the Actisense Power Feed Guide (PDF) seen in part above. The first part of any NMEA 2000 network installation must be to decide the route taken by the backbone cable. It’s subtle indeed, but possibly important to someone who wants to keep part of an N2K network constantly alive on a meager power budget. This standard enables a multi talk and multi listen network so devices on a boat from different manufacturers can send and receive data at the same time. You can feed the internal power terminal block with a heavy gauge wire fused at 8 or more amps, and each side of the network will get 4 amps to supply each device N2K processor plus any N2K-powered sensors, but you can not switch the sides separately. NMEA stands for National Marine Electronics Association and the NMEA 2000 is a communications standard used for connecting display units and marine sensors on boats. So as rugged and flexible as the Actisense QNB is - note the choice of gland or Micro C port models, or you can mix your own with A2K-PMW connectors - it does not have separate power feeds.
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