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[CA] A97 to Axiom 9RV Upgrade and additional new electronics
03-28-18, 10:58 AM (This post was last modified: 03-28-18 11:10 AM by Chuck - Raymarine - Moderator.)
Post: #4
RE: [CA] A97 to Axiom 9RV Upgrade and additional new electronics
Q. I would appreciate any overall advice or comments you might have when looking at the schematic. Nothing new is set in stone.
A. The communications diagram does not presently include a power insertion spur for the SeaTalkng / NMEA 2000 backbone. It is considered to be best practice to power the backbone via a dedicated switched 12VDC power circuit rather than relying on an autopilot ACU or course computer to provide power.
R. Thank you. My Diagram is a bit confusing. In the middle-left, there is a box with "+12 V Switched @ Helm". That connects to the SeaTalkng spur cable connection of the ITC5 to provide power to the SeaTalkng backbone.
AR. Noted.

Q6b. Is my estimate of 11 Amps reasonable?
A6b. How will the radome and thermal camera be powered?
R6b. I was intending to to power the Radome and Camera via the same NP-12. I am attaching my power budget spreadsheet. Values come from the web site or product documentation. The assumption when calculating Amps from Watts where needed is 12V are available. Any comments are, of course, appreciated.
AR6b. The chart looks good. The power consumption posted for the Axiom 9 RV assumes that an RV transducer alone has been interfaced to the MFD. The power required to drive and process RealVision, DownVision, SideVision, and high CHIRP would likely be less than that required for a 600W 50kHz/200kHz transducer. As Raymarine has not specified a power consumption value for an Axiom 9 RV which has been interfaced to a 600W 50kHz/200kHz transducer, it is quite likely no more than that of the a97 MFD (15.1W). This would make the total current draw rise to 11.3A, which is 77.5 percent of the NP-12's rating. While 70% loading is typically the cutoff for circuit protection, you may want to consider checking with Newmar regarding whether the proposed loading is acceptable. The safe choice would be to install a pair of NP-12s.
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RE: [CA] A97 to Axiom 9RV Upgrade and additional new electronics - Chuck - Raymarine - Moderator - 03-28-18 10:58 AM

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