Combo ST1, STng, NMEA2K network

[Chuck - Raymarine - Moderator]

Welcome to the Raymarine Forum 370Dancer,

There are a couple of issues which you will run into with the system as shown within your diagram. First, it is recommended that the a SeaTalk to SeaTalkng Converter not be used backfeed power into a SeaTalk bus. Accordingly, it would be recommended that SeaTalk bus be powered from a 12V power insertion spur. This would necessitate taht the red lead of the SeaTalk cable connecting the SeaTalk bus to the SeaTalk to SeaTalkng Converter not be connected to the red terminal of the S1G's SeaTalk port.
Second, Raymarine products of this vintage did not support multiple sources of any one type of data (ex. GPS, heading, wind, depth, etc.). Accordingly, the second source of GPS data would need to be removed from the system.