Technical Help with GPS Plotter

[jusw]

I am replacing an old Navman plotter with a new Garmin 50s

The installation is very simple - just power to the plotter and NMEA out put to the DSC radio

I'm perfectly happy with the power and return connections, but a little hazy on the NMEA 0183 connections.

As I understand it as the radio only received info from the plotter and does not send any back the other way so, I connect the T+ on the plotter to R+ on the radio and the R+ on the plotter to ground.
Does the radio (Raymarine)need another connection?

Does that make sense? I assume I ignore the other NMEA pair.

Any help would be appreciated.

JuSw

 

[pvb]

I am replacing an old Navman plotter with a new Garmin 50s

The installation is very simple - just power to the plotter and NMEA out put to the DSC radio

I'm perfectly happy with the power and return connections, but a little hazy on the NMEA 0183 connections.

As I understand it as the radio only received info from the plotter and does not send any back the other way so, I connect the T+ on the plotter to R+ on the radio and the R+ on the plotter to ground.
Does the radio (Raymarine)need another connection?

Does that make sense? I assume I ignore the other NMEA pair.

The Garmin 50s, like most Garmin plotters, has the ability to display DSC distress and position information. To enable this, the NMEA must be configured so that the plotter can receive information from the radio, as well as transmitting GPS information to the radio. So you can't ignore the other NMEA pair. The installation instructions will have a detailed wiring diagram for this.
.

 

[rgarside]

You need to connect Plotter T+ to Radio R+, and connect the data grounds. Connecting the Plotter R+ to ground won't help.

If you want to receive DSC data from the radio on the plotter you'll need to connect the other data line.