My ST 60 wind
, ST 50 speed and ST 50 Depth
are only hooked to the NMEA 2000
bus, nothing else except their sensors of course, they are bus powered. They daisy chain together and only one has a direct bus connection, although you can directly connect all three. I do not know if there is an advantage to direct connection.
It started when I had a Maretron wind sensor installed. The installer assured me he could make it drive my old ST60 wind, I was pretty sure he couldnít but he was the expert, right?
Anyway, you canít drive an old ST60 off of the bus, so I ended up with a new ST60 wind flanked by two old ST60ís. That worked but it wouldnít give me true wind without the speed sensor and I didnít like the way it looked so I replaced the other two as well.
I donít know if the Vesper and Zeus will talk to each other without powering the bus, I too have a Vesper and a Zeus, but have never turned them on without powering the bus too.