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GSD 20 Sonar Module
INSTALLATION INSTRUCTIONS
INSTALLATION INSTRUCTIONS
The GSD 20 must be properly installed according to the following instructions to get the best possible performance. To complete the
installation, you need the appropriate fasteners. If you experience difficulty with the installation, contact Garmin Product Support.
The module should be mounted in an out-of-the-way location that is dry and well ventilated. Avoid mounting the module where it can be
submerged in liquids or exposed to extreme temperatures. Be sure to mount the module so that the LED is visible.
To install the GSD 20 module:
1. Once the location is chosen, place the unit. Be sure to allow enough clearance for attaching the cables. Using the module as a template,
mark the location of the four mounting holes. If needed, additional mounting holes may be drilled in the side mounting flanges of the
module.
2. Attach the GSD 20 to the mounting location using the appropriate fasteners.
3. Mount the transducer according to the instructions provided with the transducer.
4. Route the cables to the mounting location of the display unit. Use the appropriate tie-wraps, fasteners, and sealant to secure the cable
along the route and through any bulkhead or deck.
5. Once the GSD 20 module has been installed, connect the power/data and transducer cables to the appropriate receptacle.
6. Refer to the following wiring diagrams for connecting the GSD 20 to compatible Garmin units.
NOTE: You can extend the wiring of the GSD 20 power/data cable up to 100’ (30 m) total length. Use 22 AWG, 4-conductor shielded cable for data
cable and 18 AWG for power. Transducer cable extensions are available through your Garmin dealer.