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GSD
28
™
INSTALLATION INSTRUCTIONS
Important Safety Information
WARNING
See the Important Safety and Product Information guide in the product box for product warnings and other
important information.
Failure to follow these warnings, cautions, and notices could result in personal injury, damage to the vessel or
device, or poor product performance.
You are responsible for the safe and prudent operation of your vessel. Sonar is a tool that enhances your
awareness of the water beneath your boat. It does not relieve you of the responsibility of observing the water
around your boat as you navigate.
CAUTION
To avoid possible personal injury, always wear safety goggles, ear protection, and a dust mask when drilling,
cutting, or sanding.
To avoid possible personal injury or damage to the device and vessel, disconnect the vessel's power supply
before beginning to install the device.
To avoid possible personal injury or damage to the device or vessel, before applying power to the device, make
sure that it has been properly grounded, following the instructions in the guide.
To avoid possible personal injury or damage to this device and vessel, only install this device when the vessel is
on land, or when properly secured and docked in calm water conditions.
For the best possible performance and to avoid potential injury, damage to the device, or damage to your vessel,
installation by a qualified marine installer is recommended.
NOTICE
When drilling or cutting, always check what is on the opposite side of the surface to avoid damaging the vessel.
Read all installation instructions before proceeding with the installation. If you experience difficulty during the
installation, contact Garmin Support.
Transducers
A transducer is required to send and receive a sonar signal from the sonar module. Proper transducer selection
and installation are critical to the operation of the device. Because mounting locations vary, see your local
Garmin dealer or contact Garmin Support for more information. Go to
garmin.com/transducers
to select a
transducer.
Installation Preparation
Because every boat is different, you must carefully plan the GSD 28 sonar module installation.
1 Select a mounting location.
2 Mount the sonar module.
3 Connect the sonar module to the transducer.
4 Connect the sonar module to power.
5 Connect the sonar module to the network.
October 2023
GUID-50800D0A-1ECA-4747-9356-D7ECA366DC2B v2
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Table of Contents
Related Manuals for Garmin GSD 28
Summary of Contents for Garmin GSD 28
- Page 1 Installation Preparation Because every boat is different, you must carefully plan the GSD 28 sonar module installation. 1 Select a mounting location. 2 Mount the sonar module. 3 Connect the sonar module to the transducer.
-
Page 2: Mounting Location Considerations
If you are upgrading from a GSD 26 sonar module, observe these considerations. • The GSD 28 device is horizontally smaller than the GSD 26 device. If possible, you should reuse two of the mounting holes on the right or left side of the mounting surface and drill two new holes for the opposite side. - Page 3 NOTICE The cord grips on the GSD 28 come with plugs installed. To ensure water cannot enter the transducer wiring block area and damage the device, do not remove the plug from an unused cord grip, and tighten all locking rings.
- Page 4 (Transducer Wire Color Tables, page 9) for specific examples of Garmin wire colors. 1 Connect the uninsulated section of each wire to the terminal block using a in (3 mm) flat screwdriver.
-
Page 5: Connecting The Device To Power
Connecting the Device to Power WARNING When connecting the power cable, do not remove the in-line fuse holder. To prevent the possibility of injury or product damage caused by fire or overheating, the appropriate fuse must be in place as indicated in the product specifications. -
Page 6: Networking Considerations
® 9000 series chartplotter, you should use the included Garmin BlueNet cable to connect the GSD 28 device to an open network port or to a Garmin BlueNet 20 switch. • If your boat is equipped with a Garmin BlueNet chartplotter and uses a Garmin BlueNet 30 gateway to... - Page 7 (Transducer Wire Color Tables, page 9) for more information. NOTE: For better visibility, the wiring block label is duplicated in the diagrams below. The GSD 28 device has one terminal block label, placed in front of the terminal block. Single-Element Transducers You can connect a single-element transducer to the terminals labelled LOW or HIGH, regardless of nominal frequency.
- Page 8 Dual-Element Transducers NOTICE Connecting the high-frequency wires to the low-frequency terminal block, or the low-frequency wires to the high-frequency terminal block, damages the device and the transducer. For dual-element transducers, the low-frequency element wires must be connected to the terminals labelled LOW and the high-frequency element wires must be connected to the terminals labelled HIGH.
- Page 9 To ensure proper transducer identification and safe operation, you must connect each single- element transducer to its own set of terminals. Transducer Ground SHIELD − GRND SHIELD TEMP XID GID1 GID2 Model Post Garmin GT12M- Black Bare White N/A Yellow N/A N/A Garmin GT15M- Black Bare White N/A Yellow N/A N/A...
- Page 10 Dual-Element Transducers Dual-element transducer wires must be connected to the specified terminals. HIGH Ground Transducer Model LOW + LOW − GRND SHIELD TEMP XID GID1 GID2 HIGH + HIGH − SHIELD SHIELD Post Blue/ Black/ Airmar 509LHW Bare Brown Bare White Orange N/A Blue Bare...
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Page 11: Status Led
Data output Garmin BlueNet network The device withstands incidental exposure to water of up to 1 m for up to 30 min. For more information, go to www.garmin.com/waterrating. Dependent on transducer rating and depth. Maximum depth dependent on transducer, water salinity, bottom type, and other water conditions. - Page 12 © 2023 Garmin Ltd. or its subsidiaries Garmin ® and the Garmin logo are trademarks of Garmin Ltd. or its subsidiaries, registered in the USA and other countries. Garmin BlueNet ™ and GSD are trademarks of Garmin Ltd. or its subsidiaries. These trademarks may not be used without the express permission of Garmin.