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5.3.1 Backlight
The backlight input is an auto sense input
which means that the applied voltage is
relative to the battery voltage. If the bat-
tery voltage is 12V the backlight setting
is maximum when the applied voltage to
pin 2 is 12V. If the battery voltage is 24V
and the applied voltage to pin 2 is 12V the
brightness will be dimmed.
PIN 2: Backlight dim input (0 to 12V or 0 to
24V, auto sense)
See chapter 8 Options.
5.3.2 NMEA0183 echo
The NMEA echo pin is used for connecting
other devices who also need the NMEA
messages from the compass sensor.
PIN 8: NMEA0183 output, in combination
with GND pin 7
See chapter 8 Options.
5.3.3 Alarm output
The Alarm output is used for connect-
ing an external warning device such as a
buzzer. If more than 100 mA is needed a
small relay should be used.
PIN 12: Alarm output, in combination with
the battery + pin
See chapter 8 Options.
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100505.01
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