From what I have read NMEA 2000 and the industrial DeviceNet standard use a 4 wire cable with two conductors for data and two for Gnd and power. NMEA 2000 uses 12v and DeviceNet uses 24v for power. I believe the interface is supposed to provide electrical isolation.
I see the Analog Devices ADM3052 mentioned in the context of DeviceNet as it has a bus side regulator to power the 5v isolated bus side of the CAN transceiver.
Is the ADM3052 the de facto standard for this sort of thing?
https://au.mouser.com/datasheet/2/609/ADM3052-3121380.pdf