Installation Instructions

24
Data cable wiring diagram: HDS-8 & HDS-10 units
NMEA 0183 wiring (data cable)
To exchange NMEA 0183 data, the HDS-8 and HDS-10 units have a NMEA 0183
version 2.0 (RS-422) communication port. Serial Communications Port one (Com
1) can be used to transmit or receive NMEA format data. Two RS-232 ports (Com 1
and Com 2) also are available via software selection. These ports transmit or receive
NMEA data.
The ve wires for the serial communications ports (Data cable) are combined with
the Power cable to form the Power/Data cable.
• Com 1 (RS-422) uses the yellow and blue wires to transmit, the
orange and green wires to receive and the shield (bare) wire for
signal ground.
Com 1 to unit
(RS-422)
To device
Yellow TX (+)
Orange RX (+)
Blue TX (-)
Green RX (-)
Shield (ground)
Receive (+)
Receive (-)
Transmit (+)
Transmit (-)
Ground
Power/Data cable
Data cable