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Northstar Explorer 538i/538 Installation and Operation Manual
50
Optional sensors and instruments
External alarms: Lights or sounders in the boat
to sound alarms through the boat (see section
15- 4).
GPS or DGPS antenna: For GPS navigation, see
section 15-5.
Fuel sensors: For fuel functions. The Explorer
538/538i can use these optional fuel flow sensors,
fitted to one or two engines:
• Northstar petrol/gasoline sensors (see
section 15-6)
• SmartCraft fuel sensors (see section 18-11)
SmartCraft: With one or two SmartCraft capable
Mercury engines, the Explorer 538/538i can
display engine data and trim and can control troll
speed (see section 18-10).
Other instruments: The Explorer 538/538i can
receive data from other instruments and send
data to other instruments by NavBus or NMEA
(see sections 18-12 and 18-13).
Please consult your Northstar dealer for more
information.
Connections
GPS antenna (Explorer 538, 15-5)
Power (15-4)
External alarms (15-4)
NavBus instruments (15-8)
NMEA out to instruments (15-9)
Petrol/gasoline sensors (15-6),
NMEA in (15-9)
Power/data cable
Pin Wire Function
1 Black Ground: - power in, NMEA ground. (The cable has two black wires which are
connected inside the cable and it does not matter which black wire you use)
2 Brown Power out, 9 V DC (not used)
3 White NMEA out
4 Blue NavBus-
5 Red + power in, 10 to 16 V DC
6 Orange NavBus+
7 Yellow Auto power in
8 Green External alarm out, 30 V DC 200 mA maximum.
Display unit
(15-3)
BlackBlack
WhiteWhite