Seiwa Si-Tex MDA2 - Manual (Page 17)

Installation
Page 14
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 38,400baud and a low speed input port which operates at 4,800baud.
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.
Figure 9 Connecting to the NMEA0183 data port
Transmit +
Transmit –
Power in +
Power in –
Not used
Not used
Receive +
Receive –
USB
Brown
Blue
Light green
Orange
Red
Black
Grey
Yellow
NMEA0183
38,400 Baud
NMEA0183
4,800 Baud