Eagle Electronics SeaCharter 502cDF - Manual (Page 40)

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Power connections for the sonar unit.
WARNING:
This product must be independently fused with the en-
closed 3-amp fuse (or equivalent), even if you connect to
a fused accessory or power buss.
If a malfunction happens inside the unit, extensive dam-
age can occur if the enclosed fuse is not used. As with all
electrical devices, this unit could be damaged to a point
that it is unrepairable and could even cause harm to the
user when not properly fused.
CAUTION:
Failure to use the enclosed 3-amp fuse will void your warranty! For
a replacement, use a type 3AG 3-amp fuse.
This unit has reverse polarity protection. No damage will occur if the
power wires are reversed. However, the unit will not work until the
wires are attached correctly.
GPS Internal Antenna
The unit has a built-in 12-parallel channel GPS + WAAS antenna.
NMEA Cable Connections
NMEAis a standard communications format for marine electronic
equipment. For example, an autopilot can connect to the NMEA inter-
face on the unit and receive positioning information. The unit is capable
of exchanging information with any device that transmits or receives
NMEA 0183 data, however, a communications cable is not available for
the unit at this time. If you need to create a NMEA 0183 connection,
consult customer service. Service contact information is located in the
back of this manual.
NMEA Wiring
To exchange NMEA data, the unit has one NMEA 0183 version 2.0
communication port. Com port one (Com-1) can be used to receive
12 volt
battery
Black wire
Red wire with
3 amp fuse
To unit
Optional power off switch for
saltwater installations