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GPSMAP 400/500 Series Installation Instructions

Your GPSMAP 400/500 series chartplotter must be properly installed according to the following instructions. You need the appropriate 

fasteners, tools, and mounts listed in each section. 

If you experience difficulty installing the chartplotter, seek the assistance of a 

professional installer, or contact Garmin Product Support.

Before installing your GPSMAP 400 or 500 series chartplotter, confirm that the package contains the items listed on the box. If any parts are 

missing, contact your Garmin dealer immediately.

WARNING

: See the 

Important Safety and Product Information

 guide in the product box for product warnings and other important 

information.

 

WARNING: 

Always wear safety goggles, ear protection, and a dust mask when drilling, cutting, or sanding.

 

NotIce: 

When drilling or cutting, always check the opposite side of the drilling or cutting surface.

To install and use your chartplotter:

1  Select a mounting location (

page 2

).

2.  Mount the chartplotter (

page 2

).

3.  Install the transducer, if applicable (

page 3

). 

4.  Install the wiring harness (

page 6

).

5.  Connect the chartplotter to a NMEA 2000 network (optional, if applicable) (

page 8

).

6.  Connect the cables to the chartplotter (

page 9

).

7.  Test the installation (

page 9

).

Chartplotter Functionality Matrix

The chartplotters in the GPSMAP 400/500 series have different functionality based on model number. Use this matrix to determine the feature 

set and installation requirements of your chartplotter.

Chartplotter

NMEA 2000

NMEA 0183

Garmin CANet Sonar

GPSMAP 420/430/430x/440/440x/450

No

Yes

Yes

“s” version only

GPSMAP 520/525/530/535/540/545/550/555

No

Yes

Yes

“s” version only

GPSMAP 421/441/451

Yes

Yes

No

“s” version only

GPSMAP 431/531

No

Yes

No

“s” version only

GPSMAP 521/526/536/541/546/551/556

Yes

Yes

No

“s” version only

September 2009 

190-01074-02 Rev. B 

Printed in Taiwan

Summary of Contents for GPSMAP 420

Page 1: ...ing always check the opposite side of the drilling or cutting surface To install and use your chartplotter 1 Select a mounting location page 2 2 Mount the chartplotter page 2 3 Install the transducer...

Page 2: ...unting the Chartplotter Use the included bracket to surface mount the chartplotter You will need the following tools and fasteners Drill Phillips or flat screwdriver Three 8 4 mm pan head machine bolt...

Page 3: ...If the transducer lead is too short extension cables are available from your Garmin dealer Assembling the Transducer 1 Insert the rubber washer H and the plastic spacer G into the transducer at the sa...

Page 4: ...distance between the transducer and the top of the transom 6 Mark the location Drill a 1 8 in 3 2 mm pilot hole approximately 3 8 in 9 5 mm deep 7 Attach the cable clamp using one of the 4 12 mm scre...

Page 5: ...GPSMAP 525 535 545 555 526 536 546 556 or with non s models compatible with a GSD 22 When installing a transducer consider the following The hull must be composed of solid fiberglass without air bubb...

Page 6: ...ss Do not cut the transducer cable because this voids your warranty Notice The maximum input voltage is 32 Vdc Do not exceed this voltage because this can damage the chartplotter and void the warranty...

Page 7: ...ce 3 Repeat step 2 using the grey and violet wires for an additional NMEA 0183 device 4 Set the serial port s on the chartplotter to use NMEA 0183 data standard or high speed See the GPSMAP 400 500 Se...

Page 8: ...n existing NMEA 2000 network on your boat you will need to build one See www garmin com for more information NOTE NMEA 2000 compatible GPSMAP 400 500 series chartplotters are not packaged with NMEA 20...

Page 9: ...6 GPSMAP 420 430 431 440 and 450 GPSMAP 430x and 440x GPSMAP 421 441 and 451 GPSMAP 521 541 551 GPSMAP 530 535 540 and 545 Testing the Installation To turn on your chartplotter for the first time pres...

Page 10: ...l 12 7 cm Full VGA display with adjustable brightness 640 480 pixels capable of 4 096 colors Case Fully gasketed high impact plastic alloy waterproof to IEC 529 IPX7 standards Temp Range From 5 F to 1...

Page 11: ...roduct Information 126996 Product Information 127250 Vessel Heading 127250 Water Depth 127488 Engine Parameters Rapid Update 128259 Speed Water Referenced 127489 Engine Parameters Dynamic 128267 Water...

Page 12: ...py 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 unauthori...

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