seamaster:
ISO1050 from Texas Instruments is the transceiver that is isolated and designed for NMEA2000. I believe that even mentions NMEA2000 in the data sheet. http://www.ti.com/lit/ds/symlink/iso1050.pdf
Thanks I'll check it out!
Yes that takes care of the signal isolation thanks. What about isolating 12VDC from the N2K bus if I want to use it to power my device?