B–3
Grounding
To prevent electrical shock and mutual interference, run a ground wire between the earth
terminal on the unit and ship’s superstructure.
Cabling schedules
The signal cable should be a twisted-pair, double-screened cable. Ground the signal cable at
the cable clamp.
Connections
Power supply
J1 (10 to 35 VDC)
Pin no. Designation
#1 +
#2 –
Input signal (NMEA)
The signal from DGPS is connected to J2 and J3. Data being fed to J2 has higher priority
than J3.
J2 J3
Pin no. Designation Pin no. Designation
#3 NMEA RD1-H #3 NMEA RD2-H
#4 NMEA RD1-C #4 NMEA RD2-C
#6 GND #6 GND
Output signal (RS-422 or NMEA)
J4, J5, J6, J7, J8, J9
Pin no. Designation
#1 TD-H
#2 TD-C
#4 GND
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