ComNav Class B AIS Installation & Operation Manual page 21

Step 4 - Connecting the accessory cable
An accessory cable is supplied with the product to provide connections to power, the external switch, the NMEA0183 data ports and
USB. The cable has a pre-moulded connector at one end which should be connected to the connector on the unit marked 'PWR/DATA'.
The other end of the cable has eight colour coded bare wires ready for connection and a USB connector for use with a PC or Mac. The
table below in Figure 1 lists the function of each colour coded wire for reference.
Wire colour Description
Red Power in +
Black Power in -
Green Switch input-
Orange Switch input+
Brown NMEA0183 port 1 TX+
Blue NMEA0183 port 1 TX-
Purple NMEA0183 port 2 RX+
Yellow NMEA0183 port 2 RX-
Table 1 Colour coding of wires in the accessory cable
Please check your wiring very carefully before applying power to the product. Failure to wire the product correctly
could result in permanent damage.
Function
Power supply connections
External switch connection for silent mode
High speed NMEA0183 output (38,400baud) intended for connection
to chart plotters
Low speed NMEA0183 input (4,800baud) intended for connection to
other NMEA0183 compatible sensors for multiplexing of data to the
chart plotter
Installation
Page 18