Simrad AP21 and AP22 Autopilots
78 20220596G
4.25 External Alarm
The external alarm circuit has an open collector output for an
external alarm relay or buzzer. The operating voltage for the
circuit is the main supply voltage. Max. load on external alarm
output is 0.9 Amp.
Ext.
alarm
TB6
J300X/J300X-40 JUNCTION UNIT
POWER PCB
TB7
TB8
TB9
Figure 4-24 External alarm connection
4.26 NI300X NMEA Interface Unit
The NI300X is normally installed inside a console or locker close
to Nav receivers, radar and instruments to keep cables short. The
unit does not have controls that need to be operated during
installation or use, but you should be able to take the lid off for
inspections, to view LED indication of received signals. It should
be installed with the cable inlet and the Robnet connectors facing
down. The NI300X is designed to operate in a location that
provides ambient temperatures below +55°C (+130°F). It is
fastened to the panel/bulkhead by the external mounting
brackets.
Note ! The NI300X is not weatherproof, and must be installed in a dry
location!
The NI300X NMEA Interface (expansion) Unit is designed to
handle installations where more NMEA lines have to be tied into
the system. Four NMEA ports are available. An additional output
data-port with DATA/CLOCK signal is capable of generating
heading data in the format used by some radar displays made by
Anritsu and Furuno. This feature is thus added to the system if a
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