Simrad NSO evo3 - External Alarm

A fuse should be fitted to the positive supply, for recommended fuse rating refer to the
technical specification in the "Appendix" on page 38.
A B
C
Key Purpose Color
A +12/24 V DC Red
B DC negative Black
C Fuse, for recommended fuse rating refer to the
technical specification in the "Appendix" on page 38.
External alarm
A A
B
C
Siren Buzzer
For sirens that draw more than 1 A, use a relay.
Key Purpose Color
A External alarm output Blue
B Siren and relay
C Buzzer
Power control connection
The yellow wire in the power cable can be used to control how the unit is turned on and off.
Power controlled by power key
The unit will turn on/off when the power key on the unit is pressed.
Leave the yellow power control wire disconnected and tape or heat-shrink the end to
prevent shorting.
Power control by supply power
The unit will turn on/off without using the power key when power is applied/removed.
Connect the yellow wire to the red wire after the fuse.
Ú
Note: The unit cannot be powered down by power button, but can be put in to standby
mode (the screen backlight turns off).
Wiring | NSO-evo3 Installation Manual
13