I want to connect my Garmin chart plotter to my Raymarine ST2000 auto pilot
The Garmin has a NMEA 0183 Rx and Tx data lines. Ie, one wire for the Rx and one wire for the Tx.
The Raymarine ST2000 has an input NMEA set of wires noted as NMEA + and NMEA - which get connected to an instrument with an NMEA output.
The NMEA + and - is a little confusing as this implies a "differential" input. The chart plotter does not have a differential Tx, only a single wire Tx output. So I am assuming that I would connected the chart plotter Tx line to the NMEA + input line on the Raymarine ST2000 and then ground the NMEA - line on the ST2000. The ST2000 manual calls this input on the ST2000 NMEA 0183. Or.. do I have this wrong?
FYI, assuming the NMEA - input does get grounded, I think the ST2000 NMEA - input will get its ground from the chart plotter ground over the data transmission cable rather than using the ground on the power input to the ST2000.
The Garmin has a NMEA 0183 Rx and Tx data lines. Ie, one wire for the Rx and one wire for the Tx.
The Raymarine ST2000 has an input NMEA set of wires noted as NMEA + and NMEA - which get connected to an instrument with an NMEA output.
The NMEA + and - is a little confusing as this implies a "differential" input. The chart plotter does not have a differential Tx, only a single wire Tx output. So I am assuming that I would connected the chart plotter Tx line to the NMEA + input line on the Raymarine ST2000 and then ground the NMEA - line on the ST2000. The ST2000 manual calls this input on the ST2000 NMEA 0183. Or.. do I have this wrong?
FYI, assuming the NMEA - input does get grounded, I think the ST2000 NMEA - input will get its ground from the chart plotter ground over the data transmission cable rather than using the ground on the power input to the ST2000.
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