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I just bought a new boat with twin 175 suzuki's. It has cable controls and the c10 didital gauges. No analog gauges. I installed a garmin 7610 xsv head unit. When i recieved the boat each gauge had its own nmea 2000 back bone. Consisting of 3 tees. Gauge, interface, and power. I didnt like this because the gauges could not talk to eachother. I biult my own backbone adding the head unit and gps antenna. I used the power from the original port engine backbone to power the new backbone and left the starboard power plug unplugged. My question is does the power from either ignition absolutely have to be plugged into backbone or can i run a seperate power from my fuse panel and disregard the 2 power cables that come from ignition. I know that y gauges will be on even if ignition switches are off. Any help on best way to set up my backbone would be great
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You can power it as you have proposed. The only issue as you are already aware will be that the network, and thus the C-10 gauges, will always be on whenever the network has power on. So it's a good idea to have a switch on the network power source so you can turn it off when you choose to.
There are quite a few alternative approaches that can be taken with this issue. People will argue about it all the time!
For example, Suzuki makes a dual power node that would allow you to keep both of your current power sources (the engine ignitions) as it automatically selects the first one that is on, so whichever engine key is turned on would power the whole network. If one is turned off the other one is automatically activated.
This is a pretty good option IMO.
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