NorthStar 972 Installation Manual page 15

Table 6: Interface connector functions
Connector name
POWER (3-pin
connector)
NMEA
(18-pin connector)
AUX
(6-pin connector)
GPS
(7-pin connector)
VGA (15-pin D
connector)
CONTROL (8-pin
connector)
Ethernet
(RJ-45 connector)
NTSC VIDEO INPUTS
(BNC coaxial 75 Ohm)
DVI video
Electrical power requirements
The 972 is a negative-ground system that's reverse-polarity protected. Power requirement is 10 VDC
minimum to 32 VDC maximum, using at least 16-gauge connecting wire.
Connecting the 972 to ship's power
The 972 is shipped with 10-foot power cables for the processor and control head that you can
lengthen to a maximum of 25 feet:
• for a cable length up to 15 feet, use 16-gauge wire or heavier
• for a cable length from 15 to 25 feet, use 14-gauge wire or heavier
972 Installation Manual, Rev. B
Connector function(s)
Power input
NMEA Port 1 input/output
NMEA Port 2 input/output
RS-232 Port
RS-422/NMEA input/output
GPS antenna input
Video output
Control signals to display
Networking
Video inputs (up to 4
sources)
Video output
CAUTION! To protect the power wiring, Northstar strongly recommends
that you connect the 972 to a circuit breaker or 7-amp fuse
located at the power source (battery or switch panel).
SECTION TWO: Installing and wiring the 972
Connects to...
10 to 32 VDC, 30 watts
NMEA devices: autopilot, heading
sensor, etc.
NMEA devices: autopilot, heading
sensor, etc.
NMEA devices, or PC interface
Northstar 491 echo sounder, or
older Northstar navigators for
database transfer
2301 GPS antenna
Remote display
Control head
Another 972 and/or radar
Any NTSC- or PAL-compatible video
sources
Control head
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