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Ã
Ignition or in-line switch
Ä
12 Vdc power source
Å
Drop cable
Æ
GDT 43 transducer
Ç
NMEA 2000 terminator or backbone cable
È
NMEA 2000 T-connector
É
Existing NMEA 2000 network
Nexus
®
Wiring
When you connect the GDT 43 to a Nexus system, you must cut
the GDT 43 cable to the desired length and connect the wires to
the dedicated depth port on the Nexus device.
GDT 43 Nexus
Black Black
Red Blue
Screen Screen
White Do not use
Transducer Calibration
NOTE: If you are using a Nexus system or if the transducer data
does not appear, the transducer must be calibrated.
You can use the NexusRace
software to calibrate the
transducer. To download the NexusRace software, go to
garmin.com/NexusRace.
Maintenance
Testing the Installation
NOTICE
You should check your boat for leaks before you leave it in the
water for an extended period of time.
The transducer must be in the water to work properly.
1
When your boat is in the water, check for leaks near the
transducer installation site.
2
If leaks are found, apply marine sealant around the
installation site, let the sealant cure, and repeat step 1.
Cleaning the Transducer
Aquatic fouling accumulates quickly and can reduce your
device's performance.
1
Remove the fouling with a soft cloth and mild detergent.
2
If the fouling is severe, use a scouring pad or putty knife to
remove growth.
3
Wipe the device dry.
Specifications
GDT 43 Specifications
Dimensions (W x L) 42 x 86 mm (1.65 x 3.38 in.)
Hull thickness Min. 6 mm (0.24 in.)
Max. 42 mm (1.65 in.)
Temperature range Operating: From -10 to 70ºC (from 14 to
158°F)
Storage: From -35 to 70ºC (from 31 to 158°F)
Transducer cable length 6 m (19.7 ft.)
Sonar frequency 200 kHz
Sonar depth* 275 m (900 ft.)
*Dependent upon the water conditions.
NMEA 2000 Adapter Specifications
Dimensions (W x L x D) 101.4 x 116.3 x 76.2 mm (4 x 4
19
/
32
x 3 in.)
Weight Adapter: 120.9 g (4.26 oz.)
With bracket: 200.7 g (7.08 oz.)
Power input From 9 to 16 Vdc
Power consumption Max. 2.4 W
Temperature range From -15 to 70ºC (from 5 to 158°F)
NMEA 2000 PGN
Type PGN Description
Transmit and
receive
005932 ISO acknowledgment
059904 ISO request
060928 ISO address claim
126208 NMEA
®
:Command, request, and
acknowledge group function
126464 Transmit and receive PGN list group function
Transmit 126996 Product information
128267 Water depth
130312 Temperature
© 2017 Garmin Ltd. or its subsidiaries
Garmin
®
, the Garmin logo, and Nexus
®
are trademarks of Garmin Ltd. or its subsidiaries,
registered in the USA and other countries. GDT
, GST
, and NexusRace
are
trademarks of Garmin Ltd. or its subsidiaries. These trademarks may not be used
without the express permission of Garmin.
NMEA 2000
®
and the NMEA 2000 logo are registered trademarks of the National Marine
Electronics Association.
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