Actisense QNB-1, N2K breakout box

Ben Ellison

Ben Ellison

Panbo editor, publisher & chief bottlewasher from 4/2005 until 8/2018, and now excited to have Ben Stein as very able publisher, webmaster, and editing colleague. Panbo is going to the next level in 2019 and beyond.

7 Responses

  1. artist/scientist says:

    Just used the box. Wonderful in many ways but one oops.
    Grommet spec is for 10mm diameter cable max. Mini backbone is 12mm. Despite the thickness of the line implying a mini backbone – that install (which we made with peeling back the cable sleeve) is not so clean as to be desireable. QNB-2?

  2. artist/scientist says:

    Actisense folks are very responsive. Already looking to offer larger grommets for mini backbone!!

  3. Drew says:

    You commented that the actisense box may not work for the simnet cables since they don’t have a shield wire. I am using the box as the main connection behind the helm between a standard devicenet (maretron) cable and a simrad autopilot with no issues just ignoring the lack of a shield wire. There are two simnet drops, to the AP24 control head and to the FC42 rate compass. Neither shows issues without the ground wire for the relatively short length of the drop (not the main bus). Note that the AC12 autopilot computer hooks wires to the simnet connection with no connection of the shield either. Seems like significant overkill to get an adapter for each interface unless there are significant emi issues. Do you think this is risky?

  4. Ben Ellison Ben Ellison says:

    I really don’t know, Drew. I’ve used SimNet cable in the QNB too, without problem, but I know the ActiSense folks are leery about it. Just because it works for us in our given electrical environments doesn’t mean it will work flawlessly elsewhere.

  5. Anonymous says:

    Very disapointed with Actisense and their NMEA 2000 to NMEA 0183 converter
    They have been promising this “next month” for nearly 2 years now !

  6. Drew says:

    I understand that different electrical environments may be an issue. I guess the alternative if necessary would be to try to kludge a drain wire to the simnet shield or alternatively lop off the simnet cables close to the device and run the devicenet cable properly shielded as much as possible. BTW, the AP24 has a nice simnet status display that shows load and any parity errors. It is a nice advantage for those of us without a real breakout box to a pc. I haven’t found a similar capability in my NavNet3D MFD yet. It identifies the topology and devices it sees on the devicenet but I haven’t seen transmission stats.

  7. Brad says:

    Those screw grommets are have a standard thread. If one is too small (or too big, in my case) they can easily be replaced with the correct size. Just go down the the electrical section of your local marine store – they are a couple bucks.

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