St1 depth -> StNg -> N2k -> cortex powering options

adamv

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May 17, 2022
78
Newport 28 mkII Bowen island
Hi, we have an old st40 depth which is currently isolated. I'd love to be able to connect this to my cortex with minimal power usage (so i can remotely monitor depth when on the hook etc). Network wise, I have:
* a ST1->StNg converter
* a StNg to N2k cable (sadly the white spur one). The StNg network is soley handling auto pilot currently.
* I'll soon have a N2K starter kit to connect to the cortex.

I guess I have two questions:
1. I dont really want to have the autopilot on all night- I'm assuming all three networks need to be continually powered, so are there any options to disable auto pilot components (via 12v switches or maybe a blue backbone with a switch in between each connection block)?
2. Do the N2k and StNG networks both need their own power connections? I know Raymarine stress that you must only have one power source and im concerned that the two networks share the same power bus.
Thanks