Installation Instructions

Data cable wiring diagram: HDS-5 & HDS-7 units

NMEA 0183 wiring (data cable)

To exchange NMEA 0183 data, the HDS-5 and HDS-7 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. The ve wires for the se-

rial 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