Raymarine C90w - Manual (Page 34)

3.7 Alarm connection
An alarm buzzer can be connected using the power / data cable
provided with the display.
Typical alarm connection
C-Series display
Red Black
Black
Alarm
Grey Black
D11216-1
-ve supply
(from battery/
breaker)
19 way multi-cable
Power, data and video
Note: The alarm output is rated for 100 mA maximum load
34 C-Series Widescreen installation