GSD 20 Sounder Module

installation instructions
Copyright 2004, 2005 Garmin Ltd. or its subsidiaries Garmin International, Inc. 1200 East 151st Street, Olathe, Kansas 66062, U.S.A. Tel. 913/397.8200 or 800/800.1020 Fax 913/397.8282 Garmin (Europe) Ltd. Unit 5, The Quadrangle, Abbey Park Industrial Estate, Romsey, SO51 9DL, U.K. Tel. 44/0870.8501241 Fax 44/0870.8501251 Garmin Corporation No. 68, Jangshu 2nd Road, Shijr, Taipei County, Taiwan Tel. 886/2.2642.9199 Fax 886/2.2642.9099
All rights reserved. Except as expressly provided herein, no part of this manual may be reproduced, copied, transmitted, disseminated, downloaded, or stored in any storage medium, for any purpose without the express prior written consent of Garmin. Garmin hereby grants permission to download a single copy of this manual onto a hard drive or other electronic storage medium to be viewed and to print one copy of this manual or of any revision hereto, provided that such electronic or printed copy of this manual must contain the complete text of this copyright notice and provided further that any unauthorized commercial distribution of this manual or any revision hereto is strictly prohibited. Information in this document is subject to change without notice. Garmin reserves the right to change or improve its products and to make changes in the content without obligation to notify any person or organization of such changes or improvements. Visit the Garmin Web site (www.garmin.com) for current updates and supplemental information concerning the use and operation of this and other Garmin products. Garmin, DCG, and See-Thru are a registered trademark of Garmin Ltd. or its subsidiaries and may not be used without the express permission of Garmin.

Safety Information

WARNING: This product, its packaging, and its components contain chemicals known to the State of California to cause cancer, birth defects, or reproductive harm. This Notice is being provided in accordance with Californias Proposition 65. If you have any questions or would like additional information, please refer to our Web site at http://www.garmin.com/prop65.
This Garmin product is warranted to be free from defects in materials or workmanship for one year from the date of purchase. Within this period, Garmin will at its sole option repair or replace any components that fail in normal use. Such repairs or replacement will be made at no charge to the customer for parts or labor, provided that the customer shall be responsible for any transportation cost. This warranty does not cover failures due to installation errors, abuse, misuse, accident, or unauthorized alteration or repairs. THE WARRANTIES AND REMEDIES CONTAINED HEREIN ARE EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES EXPRESS OR IMPLIED OR STATUTORY, INCLUDING ANY LIABILITY ARISING UNDER ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, STATUTORY OR OTHERWISE. THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, WHICH MAY VARY FROM STATE TO STATE. IN NO EVENT SHALL GARMIN BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, WHETHER RESULTING FROM THE USE, MISUSE, OR INABILITY TO USE THIS PRODUCT OR FROM DEFECTS IN THE PRODUCT. Some states do not allow the exclusion of incidental or consequential damages, so the above limitations may not apply to you. Garmin retains the exclusive right to repair or replace the product or offer a full refund of the purchase price at its sole discretion. SUCH REMEDY SHALL BE YOUR SOLE AND EXCLUSIVE REMEDY FOR ANY BREACH OF WARRANTY. Products sold through online auctions are not eligible for rebates or other special offers from Garmin. Online auction conrmations are not accepted for warranty verication. To obtain warranty service, an original or copy of the sales receipt from the original retailer is required. Garmin will not replace missing components from any package purchased through an online auction. To obtain warranty service, contact your local Garmin authorized dealer or call Garmin Product Support for shipping instructions and an RMA tracking number. The product should be securely packed with the tracking number clearly written on the outside of the package. The product should then be sent, freight charges prepaid, to any Garmin warranty service station. A copy of the original sales receipt is required as the proof of purchase for warranty repairs.

Limited Warranty

July 2005
Part Number 190-00225-00 Rev. E

Printed in Taiwan

INTRODUCTION
Thank you for choosing the Garmin GSD 20. The GSD 20 is an intelligent, remote sounder module designed to include powerful features as found in other Garmin sounders, including Depth Control Gain (DCG) and See-Thru technology. When used with compatible Garmin chartplotters, it provides full-featured depth sounder functions. It may interface to multiple head units, providing for complete sounder control from multiple stations, including transmit frequency, range, and gain adjustments. To get successful results from your GSD 20, take time to read through this installation guide. If any items are missing, please contact your Garmin dealer immediately.

Included Equipment:

GSD 20 Sounder Module 30 (9.1 m) Power/Data Cable Installation Guide for the GSD 20
Optional Transducers The transducer acts as the eyes and ears of your new sonar. The transducer transmits sound waves toward the bottom in a cone shape. The larger the cone angle, the larger the coverage area at a given depth. Proper transducer selection and installation are critical to the operation of your unit. Since mounting locations vary, see your local dealer or contact Garmin Product Support for further information. A full list of transducers can be found at www.garmin.com.
Power/Data Connector LED Status Indicator Transducer Connector

Mounting Holes

GSD 20 Sonar Module
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 difculty 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.
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 anges 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.

To install the GSD 20 module:
BASIC WIRING FOR THE GARMIN GSD 20 TO A SINGLE GPSMAP 2006/2006C/2010/2010C/3005C/3006C/3010C

WIRE COLOR

FUSE 5A
RED BLACK ORANGE WHITE/BLUE

FUSE 2A

GARMIN GSD 20 SOUNDER MODULE

RED BLACK

ORANGE

WHITE/BLUE WHITE/BROWN

WHITE/BROWN

TO TRANSDUCER

BATTERY 10-35 VOLTS DC

Notes:

1. 2. 3. 4.
Power and ground wires require 18 AWG. All other wires require 22 AWG. Use 4-conductor, shielded wiring for runs over 30 (9.1 m). Refer to the GPSMAP 2006/2006C/2010/2010C/3005C/3006C/3010C Installation Instructions for wiring the GPS 17 sensor and other devices. For runs over 30 (9.1 m), the drain wire must be connected to the shielding of the extension run. Do not terminate the end of the shield drain wire. When multiple GPSMAP 3005C/3006C/3010C units are in use, only wire the GSD 20 to one unit. The GSD 20 information is transmitted to all units connected to the Garmin Marnine Network.
BASIC WIRING FOR THE GARMIN GSD 20 TO A DUAL GPSMAP 2006/2006C/2010/2010C
*This diagram does not apply to the GPSMAP 3005C/3006C/3010C. Refer to Note 4 on the Single GPSMAP 2006/2006C/2010/2010C/3005/C3006C/3010C diagram.
Power and ground wires require 18 AWG. All other wires require 22 AWG. Use 4-conductor, shielded wiring for runs over 30 (9.1 m). Refer to the GPSMAP 2006/2006C/2010/2010C Installation Instructions for wiring the GPS 17 sensor and other devices. For runs over 30 (9.1 m), the drain wire must be connected to the shielding of the extension run. Do not terminate the end of the shield drain wire. Use unit #1 to update the GSD 20 software.
BASIC WIRING FOR THE GARMIN GSD 20 TO A SINGLE GPSMAP 276C/296/376C/396

FUSE 1.5A

WIRE COLOR RED RED BLACK WHITE/BLUE

ON OFF

BLACK BLUE YELLOW

SEE NOTE 3 OPTION 1

SEE NOTE 3 OPTION 2
1. Power and ground wires require 18 AWG. All other wires require 22 AWG. Use 4-conductor, shielded wiring for runs over 30 (9.1 m). 2. For runs over 30 (9.1 m), the drain wire must be connected to the shielding of the extension run. Do not terminate the end of the shield drain wire. 3. The Orange wire must be pulled low (-) in order for the GSD 20 to power on. Option 1: If the GSD 20 is wired to a circuit that is switched on the Red (+) wire, connect the Orange wire to ground. The GSD 20 and the GPSMAP 276C/296/376C/396 turn on/off when power is applied/removed to the Red wire. Option 2: If the Red (+) wire is applied directly to a power source, install a switch between the Orange wire and ground. The GSD 20 turns on/off when ground is applied/removed to the Orange wire.

RED RED BLACK WHITE/BLUE BLACK BLUE BROWN
BASIC WIRING FOR THE GARMIN GSD 20 TO A SINGLE GPSMAP 182/182C/192C/232
1. Power and ground wires require 18 AWG. All other wires require 22 AWG. Use 4-conductor, shielded wiring for runs over 30 (9.1 m). 2. For runs over 30 (9.1 m), the drain wire must be connected to the shielding of the extension run. Do not terminate the end of the shield drain wire. 3. The Orange wire must be pulled low (-) in order for the GSD 20 to power on. Option 1: If the GSD 20 is wired to a circuit that is switched on the Red (+) wire, connect the Orange wire to ground. The GSD 20 and the GPSMAP 182/182C/192C/232 turns on/off when power is applied/removed to the Red wire. Option 2: If the Red (+) wire is applied directly to a power source, install a switch between the Orange wire and ground. The GSD 20 turns on or off when ground is applied or removed to the Orange wire.
BASIC WIRING FOR THE GARMIN GSD 20 TO A SINGLE GPSMAP 172/172C
BLACK BLUE BROWN ORANGE ORANGE
1. Power and ground wires require 18 AWG. All other wires require 22 AWG. Use 4-conductor, shielded wiring for runs over 30 (9.1 m). 2. Refer to the GPSMAP 172/172C Owners Manual for wiring the GPS 17 sensor and other devices. 3. For runs over 30 (9.1 m), the drain wire must be connected to the shielding of the extension run. Do not terminate the end of the shield drain wire.

Blink Codes

Once the unit is installed, it switches on when the display unit is powered on (or the GSD remote power line is pulled low, with power applied). The two-color (Green/Red) LED on the GSD 20 indicates the current operational status of the module. Codes are:
Green blinking, on for 1 second, off for 1/2 second (slow blink)

Status

GSD 20 is servicing one directly wired connection and the display device is operating properly. The user should see sonar data on the display unit. GSD 20 is servicing two dirctly wired connections and the two display devices are operating properly. The user should see sonar data on both display units. GSD 20 is powered on but is waiting to connect to a display device. In this state, the GSD 20 does not transmit any sonar signals and is not sending out any sonar information to display units. If a display unit is connected and this code persists, check the wiring. Software failure - Call Garmin Product Support. If the cause is a software error, the display unit can show the error. Power must be cycled to clear the error. System alarm. The display device gives a message indicating the type of failure. After the alarm condition is xed, power must be cycled on the GSD 20 to clear the alarm.
Green blinking, on for 1/2 second, off for 1/4 second (fast blink)

Red blinking, on for 1 second, off for 1/2 second (slow blink)

Solid Red (no blink)

Red blinking, on for 1/10 second, off for 1/10 second (very fast blink)

Physical Specications

6.75 L x 4.75 W x 2.00 H (17.2cm x 12.1cm x 5.1cm) Weight: 1.5 lbs. (.680Kg) Case: Fully gasketed, high-impact plastic and aluminum alloy, waterproof to IEC 529-IPX-7 Temp Range: 5F to 158F (-15C to 70C) Source: Usage: Fuse: 10-35 Vdc 18 watts max. AGC/3AG - 2.0 Amp
Sounder Power: 500 watts (RMS) 4000 watts (peak to peak) Frequency: 50/200 kHz Depth: 1500 foot max depth*
* Depth capacity is dependent on water salinity, bottom type, and other water conditions.

Data Output

Source:
Proprietary Garmin data format.
Copyright 2004, 2005 Garmin Ltd. or its subsidiaries Garmin International, Inc. 1200 East 151st Street, Olathe, Kansas 66062, U.S.A. Garmin (Europe) Ltd. Unit 5, The Quadrangle, Abbey Park Industrial Estate, Romsey, SO51 9DL, U.K. Garmin Corporation No. 68, Jangshu 2nd Road, Shijr, Taipei County, Taiwan www.garmin.com Part Number 190-00255-00 Rev. E