4 Using the NMEA 0183 connector
dAISy 2+ comes with a NMEA 0183 connector. This allows to connect the AIS receiver to chartplotters
and other marine equipment. The connector also allows to power dAISy from the boat’s power system
instead of USB.
If your device only has one RX wire per port,
leave NMEA - unconnected
If your device has only one RX wire or you
connect external power, ground must be
connected.
External power for dAISy if you are not using
USB.
Below is an illustration on how to connect the dAISy NMEA connector with a compatible device using
single-wire or two-wire NMEA 0183 connection. Note that the colors may be different. Check the
installation instructions of your chartplotter to identify the proper connections.
single-wire NMEA connection
By default, dAISy is configured to output at 38400 Baud (NMEA high speed). This can be changed to
other baud rates in the configuration and debug menu. You also need to check the configuration of your
chartplotter. In many models, the NMEA port needs to be enabled in the settings menu and set to the
correct protocol, like for example NMEA high speed.
NMEA 0183 is compatible with RS-422, which means that the NMEA connector can also be used to
connect dAISy with RS-422 to serial, RS-422 to Ethernet and other RS-422 compatible equipment. You
may need to swap the NMEA + and NMEA - leads.
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