3.4.4 NMEA communication protocol:
NMEA 0183 RECEIVER SENTENCE:
When NMEA sentence $IIACK,000*55<CR><LF> is received, external audio alarm is accepted.
NMEA 0183 TRANSMITTER SENTENCES:
If there is no external alarm, NMEA sentence $IIALR,,,V,V,*73<CR><LF> is sent.
If external alarm occures, NMEA sentence $IIALR,,,A,V,*64<CR><LF> is sent.
If external alarm is accepted, NMEA sentence $IIALR,,,A,A,*73<CR><LF> is sent. 10s after,
NMEA sentence $IIALR,,,V,V,*73<CR><LF> is sent, indicating there is no alarm any more.
Sentences for no alarm situation and alarm situation are transmitted approx. each 10s, if there is no
change in alarm state. Sentence for alarm acknowledgement is transmitted only once, in situation
as described above.
3.4.4 Powering up
After all connections have been made, double check all connections. After checking apply power supply
and turn on main power supply fuse and spare power supply fuse.
First start-up
In case that configuration is different than factory one (factory configuration: ITNL-10 and ITSL-13) during first
start up main unit will check for modules connected and register/unregister modules accordingly. Message of
this changes will appear on during start up.
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