AISS120 Instruction Manual
13
Step 4 - Connecting to NMEA0183 Compatible Equipment
The two independent NMEA0183 data ports provide connection to your chart plotter
and other NMEA0183 compatible equipment. Each port consists of two wires colour
coded as shown in the table in Figure 8 and in the diagram in Figure 9. Connect the
wires to the appropriate connections on your NMEA0183 compatible equipment. Please
refer to your equipment manual for more information.
The AIS receiver has a high speed output port which operates at 38400baud and a low
speed input port which operates at 4800baud. The high speed port is intended primarily
to connect to a chart plotter, while the low speed port is intended to connect to other
NMEA0183 devices. A multiplexing feature is provided, which means any messages
which are received via the low speed port are automatically transmitted via the high
speed port. This is particularly useful when using a chart plotter having only a single
NMEA0183 port as any other sensor (such as a gyro-compass) can be connected to
the AIS receiver via the low speed port and the AIS receiver can be connected via the
high speed port to the chart plotter resulting in the chart plotter receiving both AIS
information and heading information simultaneously. Please ensure your equipment is
configured to use the correct baud rate for the port it is connected to.
Tr
Transmit –
Power in +
Power in –
Not used
Not used
R
Receive –
USB
Brown
Blue
Light green
Orange
Red
Black
Grey
Yellow
NMEA0183
38.4K Baud
NMEA0183
4.8K Baud
Figure 9 Connecting to the NMEA0183 data port
