Connecting to your chartplotter
NMEA 0183 port 1 is recommended for connecting to a chartplotter, operating at 38,400 baud by default. This can be changed using the configuration tools if required. Four wires are provided for a bidirectional connection, and are colour coded as shown in Figure 18.
Other manufacturers may use different signal names, however the following general guidelines will apply when connecting to other equipment:
positive signals should be connected together.
negative signals should be connected together.
transmit signals should be connected to receive signals and vice versa.
Refer to your equipment manual for more information. Both NMEA 0183 ports support multiplexing, which means that any data received on port 1 will be automatically output on port 2, and vice versa.
This can be useful when connecting to a chartplotter that only has a single NMEA 0183 port, so a sensor can be connected to port 2 on the transceiver, and the combined sensor and AIS data will be output on port 1.