B&G Vulcan 12, Инструкция по эксплуатации

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External alarm
The external alarm can be a small piezo buzzer connected directly,
or a horn siren connected through a relay.
Alarms are configured globally in the system. That is, they can be
configured on any one networked multifunction device or
instrument, and be seen, heard, and acknowledged from all devices.
Individual devices can also be configured to not sound their internal
buzzer, but still display the alarm information. For information about
configuring alarms, refer to the Alarms section in the Operator
Manual.
For sirens that draw more than 1 Amp, use a relay.
+ _
A
B
D
C
Buzzer
+ _
A
B
D
C
Siren
A
Negative power wire (black)
B
Positive power wire (red)
C
Power control wire (yellow)
D
Alarm wire (blue)
Connecting control devices
The unit can be controlled with an ZC1 or ZC2 Remote controller
connected on the NMEA 2000 network.
NMEA 2000
The NMEA 2000 data port allows receiving and sharing of a
multitude of data from various sources.
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Wiring | Vulcan Series Installation Manual