It is protected against reverse polarity, under voltage, and over voltage (for a limited
duration).
A fuse or circuit breaker should be fitted to the positive supply. For recommended fuse rating
refer to "Technical specifications" on page 43.
Key Purpose Color
A +12/24 V DC Red
B DC negative Black
C Fuse
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).
Key Purpose Color
A Power control wire, connected to supply power Yellow
Power controlled by ignition
The unit will turn on once ignition is turned on to start engines.
Ú
Note: Engine start batteries and house batteries should have a common ground
connection.
16
Wiring | NSS evo3S Installation Manual
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