Item
Wire Function
NMEA 0183 internal port Rx (in)
NMEA 0183 internal port Tx (out)
Ground (power and NMEA 0183)
Power
Connecting the Wiring Harness to Power
1
Route the wiring harness to the power source and to the
device.
2
Connect the red wire to the positive (+) battery terminal, and
connect the black wire to the negative (-) battery terminal.
NMEA 0183 Connection Considerations
• The installation instructions provided with your NMEA 0183
compatible device should contain the information you need to
identify the transmitting (Tx) and receiving (Rx) A (+) and B
(-) wires. Each port may have one or two transmitting wires,
or one or two receiving wires.
• When connecting NMEA 0183 devices to ports containing
two transmitting (Tx) wires or two receiving (Rx) wires each, it
is not necessary for the NMEA 0183 device to connect to a
common ground.
• When connecting a NMEA 0183 device to ports containing
one transmitting (Tx) wire or one receiving (Rx) wire each,
the NMEA 0183 device must be connected to a common
ground.
• When the device is mounted in a location that prevents the
internal antenna from acquiring a satellite signal, you can
connect an external GPS 19x antenna through a NMEA 0183
connection. For more information, see the GPS 19x
Installation Instructions.
NMEA 0183 Connection Diagram
Item
Description
12 Vdc power source
Wiring harness
NMEA 0183 compliant device
Item Garmin Wire
Garmin Wire
Function
Color
Power
Red
Ground
Black
Tx/Rx
Tx
Blue
Rx
Brown
Specifications
Device
Specification
echoMAP CHIRP
Dimensions (W x H x
40
D)
Display size (W x H)
Weight
Power input
Max. power usage
Compass-safe distance 25 cm (9.8 in.)
echoMAP CHIRP
Dimensions (W x H x
50
D)
Display size (W x H)
Wire Color
Brown
Blue
Black
Red
-
+
NMEA 0183 Device Wire
Function
Power
Data ground
Tx/Rx/B (-)
Rx/A (+)
Tx/A (+)
Measurement
10.2 x 16.8 x 4.6 cm (4 x
6.6 x 1.8 in.)
5.4 x 9.5 cm (2.1 x 3.7 in.)
0.4 kg (0.9 lbs.)
From 9 to 18 Vdc
5 W
17.3 x 13.5 x 4.4 cm (6.81
x 5.35 x 1.73 in.)
9 x 9 cm (3.54 x 3.54 in.)
Device
Specification
Weight
Power input
Max. power usage
Compass-safe distance 70 cm (27.6 in.)
All Models
Temperature range
Material
Water rating*
Transmit power
(RMS)**
Maximum depth***
Frequencies****
*The device withstands incidental exposure to water of up to 1 m
for up to 30 min.
**Dependent upon transducer rating and depth.
***Maximum depth, dependent upon transducer, water salinity,
bottom type, and other water conditions.
****Dependent upon echoMAP model.
NMEA 0183 Information
Type
Sentence
Transmit
GPAPB
GPBOD
GPBWC
GPGGA
GPGLL
GPGSA
GPGSV
GPRMB
GPRMC
GPRTE
GPVTG
GPWPL
GPXTE
PGRME
PGRMM
PGRMZ
SDDBT
SDDPT
SDMTW
SDVHW
Receive
DPT
DBT
MTW
RMC/GGA/GLL
VHW
WPL
Measurement
0.58 kg (1.28 lbs.)
From 9 to 18 Vdc
7.1 W
From -15 to 55°C (from 5
to 131°F)
Polycarbonate plastic
IEC 60529 IPX7
500 W
701 m (2,300 ft) at 77 kHz
• CHIRP Traditional: 50,
77, 83, or 200 kHz
• CHIRP Garmin
ClearVü: 260, 455, or
800 kHz.
Description
APB: Heading or track controller
(autopilot) sentence "B"
BOD: Bearing (origin to
destination)
BWC: Bearing and distance to
waypoint
GGA: Global positioning system
fix data
GLL: Geographic position
(latitude and longitude)
GSA: GNSS DOP and active
satellites
GSV: GNSS satellites in view
RMB: Recommended minimum
navigation information
RMC: Recommended minimum
specific GNSS data
RTE: Routes
VTG: Course over ground and
ground speed
WPL: Waypoint location
XTE: Cross track error
E: Estimated error
M: Map datum
Z: Altitude
DBT: Depth below transducer
DPT: Depth
MTW: Water temperature
VHW: Water speed and heading
Depth
Depth below transducer
Water temperature
GPS position
Water speed and heading
Waypoint location
5
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