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Installation | NAIS-500 User Manual
Step 4 - Connecting the accessory cable
An accessory cable is supplied with the product to provide connec-
tions to power, the external switch and the NMEA 0183 data ports.
The cable has a pre-moulded connector at one end which should
be connected to the connector on the unit marked ‘PWR/0183’. The
other end of the cable has eight color-coded bare wires ready for
connection. The table below lists the function of each color-coded
wire for reference.
Wire color
Pin
no.
Description Function
Red 8 Power in + Power supply
connections
12 V to 24 V DC
Black 9
Power in -
Light green 12 Switch input- External switch
connection for silent
mode
Orange 10 Switch input+
Brown 1
NMEA 0183 port 1
TX+ (Transmit +)
High speed NMEA 0183
- Port 1: (38,400 baud)
intended for connection
to chartplotters
Blue 2
NMEA 0183 port 1
TX- (Transmit -)
White 3
NMEA 0183 port 1
RX+ (Receive +)
Green 4
NMEA 0183 port 1
RX- (Receive -)
Purple 11
NMEA 0183 port 2
TX+ (Transmit +)
Low speed NMEA 0183
- Port 2: (4,800 baud)
intended for connection
to other NMEA 0183
compatible devices
Pink 7
NMEA 0183 port 2
TX- (Transmit -)
Grey 6
NMEA 0183 port 2
RX+ (Receive +)
Yellow 5
NMEA 0183 port 2
RX- (Receive -)
Color-coding of wires in the accessory cable
Warning: Please check your wiring very carefully before ap-
plying power to the product. Failure to wire the product correctly
could result in permanent damage.
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