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EngNate · 18-07-2007, 11:13

NMEA is the data protocol, the connection specifications (for a generic GPS) is RS-232 (old) or RS-422 (new & usually backward-compatible). These are serial data connections, as is SeaTalk. Seatalk is compatible with NMEA serial devices, with one distinction: Seatalk is bi-directional - it sends and recieves data on one wire. You can connect either Tx or Rx data to/from an NMEA device directly - Data Rx or Tx to Yellow. With an adapter from Raymarine you can connect both Tx and Rx data.

The RL80C has NMEA inputs and outputs, so just use that. You'll have to go into the installation setup to select the correct position data source.

18-07-2007, 11:13	#4
EngNate Commercial Vendor Join Date: Apr 2006 Location: Dryad Point, BC Central Coast, Canada Posts: 92	NMEA is the data protocol, the connection specifications (for a generic GPS) is RS-232 (old) or RS-422 (new & usually backward-compatible). These are serial data connections, as is SeaTalk. Seatalk is compatible with NMEA serial devices, with one distinction: Seatalk is bi-directional - it sends and recieves data on one wire. You can connect either Tx or Rx data to/from an NMEA device directly - Data Rx or Tx to Yellow. With an adapter from Raymarine you can connect both Tx and Rx data. The RL80C has NMEA inputs and outputs, so just use that. You'll have to go into the installation setup to select the correct position data source. __________________ Money can't buy you happiness, but it will get you a boat to enjoy it on!