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The network and any NMEA 2000 devices, including the GPS
module, will not operate unless the NMEA 2000 Power Cable is
connected to power. The NMEA 2000 power cable must be connected
to power even if your only NMEA 2000 device is the GPS module and it
is connected to the display unit's Network socket. (However, never con-
nect multiple power sources to a NMEA 2000 network. If you have
a network that is already powered, see diagram B.)
To unit
All unused Data
or NMEA 2000
power wires
should be
capped with wire
nuts and electri-
cal tape to pre-
vent shorts.
Data Cable
Use this method if you are only powering your display unit and are not
powering a NMEA 2000 network or any NMEA 2000 accessory device,
The method in diagram B is also used when your display unit is connected
to a NMEA 2000 network that is already connected to power (Never con-
nect multiple power sources to a NMEA 2000 network.)
Powering a NMEA 2000 Network Bus
A NMEA 2000 bus must be connected to a power source to operate. NMEA
2000 devices, including GPS modules, draw their power from the network bus.
If you have a pre-existing NMEA 2000 network installation, it may already be
connected to another power source. If you are not sure about a network's power
status, consult the boat manufacturer or dealer. If your NMEA 2000 bus is al-
ready powered, you do not need to connect the NMEA 2000 Power cable and
Power Diagram B
Recommended
power off switch
NMEA 2000 Power Cable
including a GPS module.
Display Unit
Power Cable
Black wire
13
Red wire with
3-amp fuse
12 volt DC
power source
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