Garmin GPS 400W User manual

190-00356-08 August 2012 Rev. G

GNS 400W Series Installation Manual Page A
190-00356-08 Rev. G
© Copyright 2009 - 2012
Garmin International, Inc., or its subsidiaries
All Rights Reserved
Except as expressly provided herein, no part of this manual may be reproduced, copied, transmitted,
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and of any revision to 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 or revision 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.
GNS is a trademark of Garmin Ltd. or its subsidiaries and may not be used without the express
permission of Garmin.
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Radio Inc. All other marks and logos are property of their respective owners. All rights reserved
At Garmin, we value your opinion. For comments about this guide, please e-mail:
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1200 E. 151st Street
Olathe, KS 66062 USA
Telephone: [phone]
Aviation Panel-Mount Technical Support Line (Toll Free): 1-888-606-5482
Web Site Address: www.garmin.com
Garmin (Europe) Ltd.
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Bull Copse Road
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Telephone: [phone]
RECORD OF REVISIONS
Revision
Revision
Date
Description
A
12/11/09
Initial Release
B
2/5/10
Update for main SW version 4.00 and adding of HTAWS.
C
6/14/10
Add main software version 4.01.
D
5/3/11
Updated HTAWs unlocking procedure.
E
9/7/11
Removed BNC connector part number 330-00087-00 and added
Section 1.6.5, ―AFM/AFMS/POH Considerations.‖
F
1/6/12
Remove TSO-C194, change HTAWS to Advisory Terrain
function.
G
8/30/12
Added main software version 5.00. See Current Revision
Description for details.

Page B GNS 400W Series Installation Manual
Rev. G 190-00356-08
CURRENT REVISION DESCRIPTION
Section
Number
Description of Change
ii
Added Garmin Aviation Product Support phone number.
1.1
Expanded introduction section for clarity.
Table 1-3
Updated software part numbers.
1.6.1
Added information related to compliance with ADS-B output.
1.6.5, 2.1,
and 2.4.1
Updated AC 20-138A to AC 20-138C. Also in
4.4.2.2
Updated TO/FROM output specs.
4.4.2.3
Updated lateral and vertical flag specs.
4.11.2.1
Clarified description of the output for Terrain Not Available.
5.3.1
Added GDL 88 and GTN crossfill information to ARINC 429 configuration page.
5.3.2
Added GDL 88 and GTN crossfill information to the RS-232 configuration page.
5.3.20
Added GDL 88 to note.
5.3.25, and
5.3.26
Added GDL 88 information.
5.5.6.14
and
5.5.6.15
Added GDL 88 and GTN Crossfill interface checks.
Appendix H
Added wiring diagrams for GTN 6XX/7XX Crossfill and GDL 88.
DOCUMENT PAGINATION
Section
Pagination
Table of Contents
i –x
Section 1
1-1 through 1-20
Section 2
2-1 through 2-10
Section 3
3-1 through 3-10
Section 4
4-1 through 4-24
Section 5
5-1 through 5-46
Section 6
6-1 through 6-2
Section 7
7-1 through 7-2
Section 8
8-1 through 8-2
Appendix A
A-1 through A-2
Appendix B
B-1 through B-2
Appendix C
C-1 through C-2
Appendix D
D-1 through D-4
Appendix E
E-1 through E-6
Appendix F
F-1 through F-8
Appendix G
G-1 through G-2
Appendix H
H-1 through H-54

GNS 400W Series Installation Manual Page i
190-00356-08 Rev. G
INFORMATION SUBJECT TO EXPORT CONTROL LAWS
This document may contain information which is subject to the Export Administration Regulations
("EAR") issued by the United States Department of Commerce (15 CFR, Chapter VII, Subchapter C) and
which may not be exported, released, or disclosed to foreign nationals inside or outside of the United
States without first obtaining an export license. A violation of the EAR may be subject to a penalty of up
to 10 years imprisonment and a fine of up to $1,000,000 under Section 2410 of the Export
Administration Act of 1979. Include this notice with any reproduced portion of this document.
SOFTWARE LICENSE NOTIFICATION
AES Encryption
The 400W Series units use AES encryption and decryption routines initially written by Dr. Brian
Gladman. The source code for these routines is available under an open source BSD or GPL license from
Dr. Gladman's web site.
DEFINITIONS OF WARNINGS, CAUTIONS, AND NOTES
WARNING
Warnings are used to bring to the installer‘s immediate attention that not only
damage to the equipment but personal injury may occur if the instruction is
disregarded.
CAUTION
Cautions are used to alert the individual that damage to equipment may result
if the procedural step is not followed to the letter.
NOTE
Notes are used to expand and explain the preceding step and provide further
understanding of the reason for the particular operation.

Page ii GNS 400W Series Installation Manual
Rev. G 190-00356-08
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 California's Proposition 65. If you have any questions or
would like additional information, please refer to our web site at
www.garmin.com/prop65
Perchlorate Material –special handling may apply, see
www.dtsc.ca.gov/hazardouswaste/perchlorate/
WARNING
This product contains a Lithium battery that must be recycled or disposed of properly.
Battery replacement and removal must be performed by professional services.
Lamp(s) inside this product contains mercury and must be recycled or disposed of
according to local, state, or federal laws.
For more information go to:
www.garmin.com/aboutGarmin/environment/disposal.jsp.
NOTE
Garmin recommends installation of the GNS 400W Series by a Garmin-authorized
installer. To the extent allowable by law, Garmin will not be liable for damages resulting
from the improper or negligent installation of the GNS 400W Series by anyone other
than a Garmin-authorized installer. It is the responsibility of the installer to ensure the
latest revision of the applicable installation manual is used for any installation of a
Garmin product. For questions, or to request the latest revision of a Garmin installation
manual, please contact Garmin Aviation Product Support at 888-606-5482.
Hg

GNS 400W Series Installation Manual Page iii
190-00356-08 Rev. G
TABLE OF CONTENTS
PARAGRAPH PAGE
1GENERAL DESCRIPTION.........................................................................................................1-1
1.1 Introduction...................................................................................................................................1-1
1.2 RESERVED..................................................................................................................................1-2
1.3 Equipment Description.................................................................................................................1-2
1.4 Technical Specifications...............................................................................................................1-3
1.4.1 Physical Characteristics........................................................................................................1-3
1.4.2 General Specifications..........................................................................................................1-3
1.4.3 GPS Specifications...............................................................................................................1-4
1.4.4 COM Transceiver Specifications (GNC 420W and GNS 430W Only) **..........................1-5
1.4.5 VOR Specifications (GNS 430W Only)...............................................................................1-6
1.4.6 LOC Specifications (GNS 430W Only)...............................................................................1-6
1.4.7 Glideslope Specifications (GNS 430W Only)......................................................................1-7
1.4.8 GPS Antenna Requirements.................................................................................................1-8
1.5 License Requirements...................................................................................................................1-9
1.6 Regulatory Compliance ..............................................................................................................1-10
1.6.1 TSO Authorization and Advisory Circular Reference .......................................................1-10
1.6.2 TSO Deviations ..................................................................................................................1-13
1.6.3 ETSO Deviations................................................................................................................1-14
1.6.4 FCC Grant of Equipment Authorization ............................................................................1-14
1.6.5 AFM/AFMS/POH Considerations .....................................................................................1-15
1.7 Database Options and Updates...................................................................................................1-18
1.7.1 Aviation Database...............................................................................................................1-18
1.7.2 Terrain/Obstacle Database .................................................................................................1-18
1.8 Fault Detection and Exclusion (FDE) ........................................................................................1-18
1.9 Aviation Limited Warranty.........................................................................................................1-19
2INSTALLATION OVERVIEW...................................................................................................2-1
2.1 Introduction...................................................................................................................................2-1
2.2 Minimum System Configuration ..................................................................................................2-1
2.2.1 VFR Installation ...................................................................................................................2-1
2.2.2 IFR GPS Installation.............................................................................................................2-1
2.2.3 IFR VOR/LOC/GS Installation ............................................................................................2-2
2.3 External Sensors ...........................................................................................................................2-2
2.3.1 Multiple Uncorrected Pressure Altitude Sources.................................................................2-2
2.3.2 Multiple Baro-Corrected Altitude Sources...........................................................................2-3
2.3.3 Multiple Heading Sources....................................................................................................2-3
2.4 Antenna Considerations................................................................................................................2-4
2.4.1 GPS Antenna Location.........................................................................................................2-4
2.4.2 COM Antenna Location .......................................................................................................2-5
2.4.3 VOR/LOC Antenna Location...............................................................................................2-7
2.4.4 Glideslope Antenna Location...............................................................................................2-7
2.4.5 Electrical Bonding................................................................................................................2-7
2.4.6 Interference of GPS..............................................................................................................2-7
2.4.7 COM, VOR/LOC, and Glideslope Antenna Installation Instructions..................................2-7
2.5 Mounting Considerations..............................................................................................................2-8

Page iv GNS 400W Series Installation Manual
Rev. G 190-00356-08
2.6 Cabling and Wiring Considerations..............................................................................................2-8
2.7 Air Circulation and Cooling .........................................................................................................2-8
2.8 Compass Safe Distance.................................................................................................................2-9
3INSTALLATION PROCEDURES...............................................................................................3-1
3.1 Unit and Accessories ....................................................................................................................3-1
3.2 Optional Accessories ....................................................................................................................3-2
3.2.1 GPS Antenna Options...........................................................................................................3-2
3.2.2 Other Accessories.................................................................................................................3-2
3.2.3 Enable Cards.........................................................................................................................3-3
3.3 Database Options..........................................................................................................................3-3
3.4 Miscellaneous Options .................................................................................................................3-3
3.5 Optional Reference Material ........................................................................................................3-3
3.6 Installation Materials Required but Not Provided........................................................................3-4
3.6.1 Optional Accessories Not Supplied (GNC 420W and GNS 430W Only) ...........................3-4
3.6.2 Materials Required But Not Supplied (New Installations Only) .........................................3-4
3.7 Special Tools Required.................................................................................................................3-5
3.8 Cable Installation..........................................................................................................................3-6
3.9 Equipment Mounting....................................................................................................................3-7
3.9.1 Rack Installation...................................................................................................................3-7
3.9.2 400W Series Unit Insertion and Removal............................................................................3-7
3.9.3 Unit Replacement .................................................................................................................3-7
3.10 Antenna Installation and Connections..........................................................................................3-8
3.10.1 GPS Antenna ........................................................................................................................3-8
3.10.2 COM Antenna.......................................................................................................................3-9
3.10.3 NAV Antenna.......................................................................................................................3-9
4SYSTEM INTERCONNECTS.....................................................................................................4-1
4.1 Pin Function List...........................................................................................................................4-1
4.1.1 P4001 Main Connector.........................................................................................................4-1
4.1.2 P4002 COM Connector (GNC 420W and GNS 430W Only)..............................................4-3
4.1.3 P4006 NAV Connector (GNS 430W Only).........................................................................4-4
4.2 Power, Lighting, and Antennas.....................................................................................................4-5
4.2.1 Power....................................................................................................................................4-5
4.2.2 Lighting Bus .........................................................................................................................4-5
4.2.3 Antennas...............................................................................................................................4-5
4.3 Altitude Gray Code.......................................................................................................................4-6
4.4 Main Indicator ..............................................................................................................................4-7
4.4.1 Main Indicator Function.......................................................................................................4-7
4.4.2 Main Indicator Electrical Characteristics.............................................................................4-7
4.4.3 Main Indicator Configuration...............................................................................................4-8
4.4.4 Main Indicator Calibration and Checkout............................................................................4-8
4.4.5 Main Indicator Interconnect .................................................................................................4-8
4.5 Annunciators/Switches .................................................................................................................4-9
4.5.1 Annunciators/Switches Function..........................................................................................4-9
4.5.2 Annunciators/Switches Electrical Characteristics..............................................................4-11
4.5.3 Annunciators/Switches Configuration................................................................................4-11
4.5.4 Annunciators/Switches Calibration and Checkout.............................................................4-11

GNS 400W Series Installation Manual Page v
190-00356-08 Rev. G
4.5.5 Annunciators/Switches Interconnect..................................................................................4-11
4.6 Serial Data ..................................................................................................................................4-12
4.6.1 Serial Data Function...........................................................................................................4-12
4.6.2 Serial Data Electrical Characteristics.................................................................................4-15
4.6.3 Serial Data Configuration...................................................................................................4-15
4.6.4 Serial Data Calibration and Checkout................................................................................4-15
4.6.5 Serial Data Interconnects....................................................................................................4-15
4.7 COM/VOR/ILS Audio (GNC 420W and GNS 430W only) ......................................................4-16
4.7.1 COM/VOR/ILS Audio Function ........................................................................................4-16
4.7.2 COM/VOR/ILS Audio Electrical Characteristics ..............................................................4-16
4.7.3 COM/VOR/ILS Audio Configuration................................................................................4-17
4.7.4 COM/VOR/ILS Audio Calibration and Checkout .............................................................4-17
4.7.5 COM/VOR/ILS Audio Interconnect...................................................................................4-17
4.8 VOR/ILS Indicator (GNS 430W Only)......................................................................................4-18
4.8.1 VOR/ILS Indicator Function..............................................................................................4-18
4.8.2 VOR/ILS Indicator Electrical Characteristics....................................................................4-18
4.8.3 VOR/ILS Indicator Configuration......................................................................................4-19
4.8.4 VOR/ILS Indicator Calibration and Checkout...................................................................4-19
4.8.5 VOR/ILS Indicator Interconnect ........................................................................................4-19
4.9 RMI/OBI.....................................................................................................................................4-20
4.9.1 RMI/OBI Function..............................................................................................................4-20
4.9.2 RMI/OBI Electrical Characteristics ...................................................................................4-20
4.9.3 RMI/OBI Configuration .....................................................................................................4-20
4.9.4 RMI/OBI Calibration and Checkout...................................................................................4-20
4.9.5 RMI/OBI Interconnect........................................................................................................4-20
4.10 DME Tuning (GNS 430W Only)................................................................................................4-21
4.10.1 DME Tuning Function........................................................................................................4-21
4.10.2 DME Tuning Electrical Characteristics .............................................................................4-21
4.10.3 DME Tuning Configuration ...............................................................................................4-22
4.10.4 DME Tuning Calibration and Checkout.............................................................................4-22
4.10.5 DME Tuning Interconnect References...............................................................................4-22
4.11 HTAWS Interfaces .....................................................................................................................4-22
4.11.1 Audio..................................................................................................................................4-22
4.11.2 Annunciators.......................................................................................................................4-22
4.11.3 Discrete I/O.........................................................................................................................4-23
4.11.4 HTAWS Configuration.......................................................................................................4-23
4.11.5 HTAWS Calibration and Checkout....................................................................................4-23
4.11.6 HTAWS Annunciator Interconnect (optional) ...................................................................4-23
5POST INSTALLATION CONFIGURATION AND CHECKOUT PROCEDURES..................5-1
5.1 Installation Check.........................................................................................................................5-1
5.1.1 Mounting and Wiring Check................................................................................................5-1
5.1.2 Connector Engagement Check .............................................................................................5-1
5.2 Unit Options..................................................................................................................................5-1
5.2.1 Unit Identification ................................................................................................................5-1
5.2.2 HTAWS Enable Instructions................................................................................................5-1
5.3 Configuration Mode Operations...................................................................................................5-2
5.3.1 MAIN ARINC 429 CONFIG Page.......................................................................................5-2
5.3.2 MAIN RS-232 CONFIG Page..............................................................................................5-6

Page vi GNS 400W Series Installation Manual
Rev. G 190-00356-08
5.3.3 MAIN SYSTEM CONFIG...................................................................................................5-8
5.3.4 MAIN INPUTS 1 Page.......................................................................................................5-10
5.3.5 MAIN INPUTS 2 Page.......................................................................................................5-11
5.3.6 INSTRUMENT PANEL SELF-TEST Page.......................................................................5-11
5.3.7 MAIN LIGHTING Page.....................................................................................................5-12
5.3.8 GPS DATE/TIME SETUP Page ........................................................................................5-13
5.3.9 MAIN DISCRETE INPUTS Page......................................................................................5-14
5.3.10 MAIN DISCRETE OUTPUTS Page..................................................................................5-15
5.3.11 MAIN CDI/OBS CONFIG Page.........................................................................................5-16
5.3.12 COM SETUP Page (GNC 420W and GNS 430W Only)...................................................5-18
5.3.13 VOR DISCRETE INPUTS Page (GNS 430W Only).........................................................5-19
5.3.14 VOR/LOC/GS CDI Page (GNS 430W Only).....................................................................5-19
5.3.15 VOR/LOC/GS ARINC 429 CONFIG Page (GNS 430W Only) ........................................5-21
5.3.16 GPS Vertical Offset............................................................................................................5-22
5.3.17 STORMSCOPE®CONFIG Page........................................................................................5-23
5.3.18 STORMSCOPE®TEST Page.............................................................................................5-23
5.3.19 STORMSCOPE®DOWNLOAD DATA Page...................................................................5-23
5.3.20 TRAFFIC Page...................................................................................................................5-24
5.3.21 RYAN TCAD CONFIG Page.............................................................................................5-25
5.3.22 GAD 42 CONFIG Page......................................................................................................5-25
5.3.23 GDL CONFIG Page............................................................................................................5-25
5.3.24 DATA LINK DIAGNOSTICS Page ..................................................................................5-26
5.3.25 GDL 88 STATUS Page......................................................................................................5-26
5.3.26 GDL 88 INFO.....................................................................................................................5-26
5.3.27 TAWS AUDIO CONFIG 1 Page........................................................................................5-27
5.3.28 TAWS AUDIO CONFIG 2 Page........................................................................................5-28
5.4 Ground Checks (Configuration Mode).......................................................................................5-29
5.4.1 Main Indicator (Analog Only)............................................................................................5-29
5.4.2 VOR/ILS Indicator (GNS 430W Only)..............................................................................5-29
5.4.3 Discrete Inputs and Annunciator Outputs Checkout..........................................................5-29
5.4.4 ADC, Altitude Encoder, Fuel Sensor and Fuel/Air Data Computer ..................................5-30
5.4.5 Altitude Encoder (Gray Code Connection)........................................................................5-30
5.4.6 AHRS/IRU Interface Check ...............................................................................................5-31
5.4.7 GAD 42 Interface Check....................................................................................................5-31
5.4.8 Lighting Bus Interface Check.............................................................................................5-31
5.4.9 HTAWS Audio Check........................................................................................................5-32
5.5 Ground Checks (Normal Mode) .................................................................................................5-33
5.5.1 Display of Self-Test Data...................................................................................................5-33
5.5.2 Signal Acquisition Check...................................................................................................5-34
5.5.3 VHF COM Interference Check...........................................................................................5-34
5.5.4 VHF NAV Checkout (GNS 430W)....................................................................................5-36
5.5.5 VHF COM Checkout (GNC 420W/GNS 430W)...............................................................5-36
5.5.6 Interface Checkout..............................................................................................................5-36
5.5.7 Magnetic Compass Check ..................................................................................................5-43
5.5.8 HTAWS System Check......................................................................................................5-43
5.6 Flight Checks..............................................................................................................................5-44
5.6.1 GPS Flight Check...............................................................................................................5-44
5.6.2 VHF COM Flight Check (GNC 420W and GNS 430W)...................................................5-44
5.6.3 VOR Flight Check (GNS 430W)........................................................................................5-44
5.6.4 ILS Flight Check (GNS 430W)..........................................................................................5-45

GNS 400W Series Installation Manual Page vii
190-00356-08 Rev. G
5.6.5 Autopilot Flight Check.......................................................................................................5-45
5.7 Database Check...........................................................................................................................5-45
5.7.1 Data Card Replacement......................................................................................................5-45
6RESERVED..................................................................................................................................6-1
7LIMITATIONS.............................................................................................................................7-1
7.1 Operations.....................................................................................................................................7-1
7.1.1 HTAWS Operation...............................................................................................................7-1
7.2 Installation ....................................................................................................................................7-1
7.2.1 GPS Antenna ........................................................................................................................7-1
7.3 Aircraft Radio Station License .....................................................................................................7-1
8PERIODIC MAINTENANCE......................................................................................................8-1
8.1 Equipment Calibration..................................................................................................................8-1
8.2 VOR Checks .................................................................................................................................8-1
8.3 Cleaning........................................................................................................................................8-1
8.4 Battery Replacement.....................................................................................................................8-1
APPENDIX A ENVIRONMENTAL QUALIFICATION FORM .....................................................A-1
APPENDIX B RESERVED ............................................................................................................... B-1
APPENDIX C RESERVED ............................................................................................................... C-1
APPENDIX D 400W SERIES RS-232 AVIATION DATA FORMAT.............................................D-1
D.1 Electrical Interface.......................................................................................................................D-1
D.2 General Output Format................................................................................................................D-1
D.3 Output Sentence Type 1...............................................................................................................D-1
D.4 Output Sentence Type 2...............................................................................................................D-3
APPENDIX E 400W SERIES RS-232 FUEL/AIR DATA INPUT FORMAT.................................. E-1
E.1 Electrical Interface....................................................................................................................... E-1
E.2 Shadin Altitude Sentence............................................................................................................. E-1
E.3 Icarus Altitude Sentence.............................................................................................................. E-1
E.4 Shadin Fuel Flow Sentence ......................................................................................................... E-2
E.5 ARNAV/EI Fuel Flow Sentence.................................................................................................. E-2
E.6 Shadin Fuel/Air Data Computer Sentence................................................................................... E-3
APPENDIX F MECHANICAL DRAWINGS....................................................................................F-1
F.1 Drawing List .................................................................................................................................F-1
APPENDIX G RESERVED ...............................................................................................................G-1
APPENDIX H INTERCONNECT DIAGRAMS ...............................................................................H-1
H.1 Drawing List................................................................................................................................H-1

Page viii GNS 400W Series Installation Manual
Rev. G 190-00356-08
LIST OF FIGURES
Figure 2-1. GPS Antenna Installation Considerations..............................................................................2-6
Figure 5-1. MAIN ARINC 429 CONFIG Page ........................................................................................5-2
Figure 5-2. MAIN RS-232 CONFIG Page................................................................................................5-6
Figure 5-3. MAIN SYSTEM CONFIG Page............................................................................................5-8
Figure 5-4. MAIN SYSTEM CONFIG Page............................................................................................5-8
Figure 5-5. MAIN SYSTEM CONFIG Page............................................................................................5-9
Figure 5-6. MAIN SYSTEM CONFIG Page............................................................................................5-9
Figure 5-7. MAIN SYSTEM CONFIG Page..........................................................................................5-10
Figure 5-8. MAIN INPUTS 1 Page.........................................................................................................5-10
Figure 5-9. MAIN INPUTS 2 Page.........................................................................................................5-11
Figure 5-10. INSTRUMENT PANEL SELF-TEST Page ......................................................................5-11
Figure 5-11. MAIN LIGHTING Page.....................................................................................................5-12
Figure 5-12. MAIN LIGHTING Page.....................................................................................................5-13
Figure 5-13. DATE/TIME SETUP Page ................................................................................................5-13
Figure 5-14. MAIN DISCRETE INPUTS Page.......................................................................................5-14
Figure 5-15. MAIN DISCRETE OUTPUTS Page .................................................................................5-15
Figure 5-16. MAIN CDI/OBS CONFIG Page........................................................................................5-16
Figure 5-17. COM SETUP Page.............................................................................................................5-18
Figure 5-18. VOR DISCRETE INPUTS Page........................................................................................5-19
Figure 5-19. VOR/LOC/GS CDI Page ...................................................................................................5-19
Figure 5-20. VOR/LOC/GS ARINC 429 CONFIG Page.......................................................................5-21
Figure 5-21. Measurement of GPS Vertical Offset ................................................................................5-22
Figure 5-22. GPS Vertical Offset Page...................................................................................................5-22
Figure 5-23. STORMSCOPE CONFIG Page.........................................................................................5-23
Figure 5-24. STORMSCOPE TEST Page..............................................................................................5-23
Figure 5-25. STORMSCOPE DOWNLOAD DATA Page ....................................................................5-23
Figure 5-26. TRAFFIC Page (ARINC 429 Traffic Interface) ...............................................................5-24
Figure 5-27. TRAFFIC Page (TCAD using RS-232 Interface).............................................................5-24
Figure 5-28. RYAN TCAD CONFIG Page............................................................................................5-25
Figure 5-29. GAD 42 CONFIG Page......................................................................................................5-25
Figure 5-30. GDL CONFIG Page...........................................................................................................5-25
Figure 5-31. Data Link Diagnostics........................................................................................................5-26
Figure 5-32. GDL 88 Status Page...........................................................................................................5-26
Figure 5-33. GDL 88 Info Page..............................................................................................................5-26
Figure 5-34. TAWS AUDIO CONFIG 1 Page.......................................................................................5-27
Figure 5-35. TAWS AUDIO CONFIG 2 Page.......................................................................................5-28
Figure F-1. 400W Series Mounting Rack Dimensions.............................................................................F-3
Figure F-2. GNS 430W Mounting Rack Installation................................................................................F-4
Figure F-3. GNC 420W Mounting Rack Installation ...............................................................................F-5
Figure F-4. GPS 400W Mounting Rack Installation ................................................................................F-6
Figure F-5. 400W Series Recommended Panel Cutout Dimensions........................................................F-7
Figure H-1. 400W Series System Interface Diagram ..............................................................................H-3
Figure H-2. GNS 430W Typical Installation...........................................................................................H-4
Figure H-3. GNC 420W Typical Installation ..........................................................................................H-6
Figure H-4. GPS 400W Typical Installation ...........................................................................................H-8
Figure H-5. Power, Lighting, and Antenna Interconnect.......................................................................H-10
Figure H-6. Altitude Gray Code Interconnect .......................................................................................H-13
Figure H-7. Not Used.............................................................................................................................H-14
Figure H-8. Not Used.............................................................................................................................H-14

GNS 400W Series Installation Manual Page ix
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Figure H-9. Not Used.............................................................................................................................H-14
Figure H-10. RS-232 Serial Data Interconnect......................................................................................H-15
Figure H-11. ARINC 429 EFIS Interconnect ........................................................................................H-17
Figure H-12. ARINC 429 Sandel EHSI Interconnect (One 400W Series Unit, One Sandel SN3308).H-19
Figure H-13. ARINC 429 Sandel EHSI Interconnect (Two GNS 430W, One Sandel SN3308) ..........H-21
Figure H-14. Not Used...........................................................................................................................H-23
Figure H-15. ARINC 429/RS-232 Air Data/IRU/AHRS Interconnect..................................................H-24
Figure H-16. Traffic Advisory System Interconnect.............................................................................H-26
Figure H-17. GTX 330 Interconnect......................................................................................................H-28
Figure H-18. Weather and Terrain Interconnect....................................................................................H-29
Figure H-19. Audio Panel Interconnect.................................................................................................H-31
Figure H-20. VOR/ILS Indicator Interconnect......................................................................................H-33
Figure H-21. RMI/OBI Interconnect .....................................................................................................H-34
Figure H-22. King Serial Panel DME Tuning Interconnect ..................................................................H-35
Figure H-23. King Serial Remote DME Tuning Interconnect...............................................................H-36
Figure H-24. Parallel 2 of 5 DME Tuning Interconnect........................................................................H-37
Figure H-25. Autopilot Interconnect .....................................................................................................H-38
Figure H-26. Not Used...........................................................................................................................H-39
Figure H-27. Not Used...........................................................................................................................H-39
Figure H-28. ARINC 429 Sandel EHSI Interconnect (One 400W, One Sandel SN3500)....................H-40
Figure H-29. External Navigation Source and GPS Annunciators........................................................H-42
Figure H-30. Parallel Slip Code DME Tuning Interconnect .................................................................H-44
Figure H-31. Not Used...........................................................................................................................H-45
Figure H-32. Not Used...........................................................................................................................H-45
Figure H-33. Switches Interconnect ......................................................................................................H-46
Figure H-34. Not Used...........................................................................................................................H-47
Figure H-35. Not Used...........................................................................................................................H-47
Figure H-36. Garmin GAD 42 Interconnect..........................................................................................H-48
Figure H-37. Garmin GDU 620 Interconnect........................................................................................H-49
Figure H-38. HTAWS Annunciator Interconnect..................................................................................H-50
Figure H-39. Mid-Continent HTAWS Annunciator Interconnect.........................................................H-51
Figure H-40. GTN 6XX/7XX Crossfill Interconnect............................................................................H-52
Figure H-41. GDL 88/88D Interconnect................................................................................................H-53
LIST OF TABLES
Table 1-1. 400W Series Units...................................................................................................................1-1
Table 1-2. Antennas Without IFR GPS Operational Limitations.............................................................1-8
Table 1-3. TSO Authorization................................................................................................................1-10
Table 1-4. Non-TSO Functions ..............................................................................................................1-11
Table 1-5. Main Software Part Number and Version.............................................................................1-11
Table 1-6. GPS/WAAS Software Part Number and Version .................................................................1-11
Table 3-1. Catalog Part Numbers .............................................................................................................3-1
Table 3-2. Standard Kit Accessories ........................................................................................................3-1
Table 3-3. Recommended Crimp Tools (or Equivalent) ..........................................................................3-5
Table 3-4. Pin Contact Part Numbers.......................................................................................................3-6
Table A-1. Environmental Qualification Form Part Numbers ................................................................A-1
Table D-1. Type 1 Output Sentence Format.............................................................................................D-2
Table D-2. Type 2 Output Sentence Format.............................................................................................D-4

Page x GNS 400W Series Installation Manual
Rev. G 190-00356-08
GNS 400W SERIES HARDWARE MOD LEVEL HISTORY
The following table identifies hardware modification (Mod) Levels for the GPS 400W, GNC 420W
and GNS 430W. Mod Levels are listed with the associated service bulletin number, service bulletin
date, and the purpose of the modification. The table is current at the time of publication of this manual
(see date on front cover) and is subject to change without notice. Authorized Garmin Sales and Service
Centers are encouraged to access the most up-to-date bulletin and advisory information on the Garmin
Dealer Resource web site at www.garmin.com using their Garmin -provided user name and password.
MOD LEVEL
SERVICE
BULLETIN
NUMBER
SERVICE BULLETIN
DATE
PURPOSE OF MODIFICATION

GNS 400W Series Installation Manual Page 1-1
190-00356-08 Rev. G
1GENERAL DESCRIPTION
1.1 Introduction
This manual is intended to provide physical, mechanical and electrical information for use in the
planning and design of an installation of the GNS 400W Series unit into an aircraft. It is not a substitute
for an approved airframe-specific maintenance manual, installation design drawing, or complete
installation data package. Attempting to install equipment by reference to this manual alone and without
first planning or designing an installation specific to your aircraft is not recommended. The content of
this manual assumes use by competent and qualified avionics engineering personnel and/or avionics
installation specialists using standard aviation maintenance practices in accordance with Title 14 of the
Code of Federal Regulations and other relevant accepted practices, and is not intended for use by
individuals who lack the competencies set forth above.
The 400W Series includes the GPS 400W, GNC 420W, GNC 420AW, GNS 430W, and GNS 430AW
panel-mounted units. Refer to Section 7, Limitations for additional information and other considerations.
NOTE
Except where specifically noted, references made to the 430W will equally apply to the
430AW. Also, except where specifically noted, references made to the 420W will apply
equally to 420AW.
Table 1-1. 400W Series Units
MODEL
PART NUMBER
COLOR
NOTES
GPS 400W
011-01057-00
BLACK
011-01057-10
GRAY
011-01057-40
BLACK
NOTE 1
011-01057-50
GRAY
NOTE 1
GNC 420W
011-01058-00
BLACK
011-01058-10
GRAY
011-01058-40
BLACK
NOTE 1
011-01058-45
BLACK
28 VDC UPGRADE UNIT
011-01058-50
GRAY
NOTE 1
GNC 420AW
011-01059-00
BLACK
011-01059-10
GRAY
011-01059-40
BLACK
NOTE 1
011-01059-50
GRAY
NOTE 1
GNS 430W
011-01060-00
BLACK
011-01060-10
GRAY
011-01060-40
BLACK
NOTE 1
011-01060-45
BLACK
28 VDC UPGRADE UNIT
011-01060-50
GRAY
NOTE 1
GNS 430AW
011-01061-00
BLACK
011-01061-10
GRAY
011-01061-40
BLACK
NOTE 1
011-01061-50
GRAY
NOTE 1
Designations: A = 28 VDC Unit with 16w COM transmitter
Note 1:The unit is an upgrade of the non-WAAS unit.

Page 1-2 GNS 400W Series Installation Manual
Rev. G 190-00356-08
1.2 RESERVED
1.3 Equipment Description
The 400W Series units are 6.25 inches wide 2.66 inches high. The display is a 240 by 128 pixel color
LCD. The units include two removable data cards, one with a Jeppesen database (to be inserted in the left
card slot), and the second being a terrain/obstacle database (to be inserted in the right card slot).
The GPS 400W is a GPS/WAAS unit that meets the requirements of Technical Standard Order
(TSO)-C146a (specified in Table 1-3) and may be approved for IFR en route, terminal, non-precision,
and precision approach operations.
The GNC 420W/(AW) includes all the features of the GPS 400W, and also includes VHF
communications transceiver. The ―AW‖ model is a 28 VDC unit with a 16 Watt COM transmitter. The
GNC 420W/(AW) meets the requirements of TSOs specified in Table 1-3.
The GNS 430W/(AW) includes all the features of the GNC 420W/(AW), and also includes airborne
VOR/localizer (LOC) and glideslope (G/S) receivers. The ―AW‖ model is a 28 VDC unit with a 16 Watt
COM transmitter. The GNS 430W/(AW) meets the requirements of TSOs specified in Table 1-3.
CAUTION
The GPS 400W Series product display is coated with a special anti-reflective coating
which is very sensitive to skin oils, waxes and abrasive cleaners. CLEANERS
CONTAINING AMMONIA WILL HARM THE ANTI-REFLECTIVE COATING. It is
very important to clean the display using a clean, lint-free cloth and an eyeglass lens
cleaner that is specified as safe for anti-reflective coatings.
CAUTION
The use of ground-based cellular telephones while aircraft are airborne is prohibited by
FCC rules. Due to potential interference with onboard systems, the use of ground-based
cell phones while the aircraft is on the ground is subject to FAA regulation 14 CFR
§91.21.
FCC regulation 47 CFR §22.925 prohibits airborne operation of ground-based cellular
telephones installed in or carried aboard aircraft. Ground-based cellular telephones must
not be operated while aircraft are off the ground. When any aircraft leaves the ground,
all ground-based cellular telephones on board that aircraft must be turned off. Ground-
based cell phones that are on, even in a monitoring state, can disrupt GPS performance.

GNS 400W Series Installation Manual Page 1-3
190-00356-08 Rev. G
1.4 Technical Specifications
1.4.1 Physical Characteristics
Bezel Height
2.66 in. (67 mm)
Bezel Width
6.25 in. (159 mm)
Rack Height (Dimple-to-Dimple)
2.69 in. (68 mm)
Rack Width
6.32 in. (160 mm)
Depth Behind Panel with Connectors
(Measured from face of aircraft panel to rear of connector backshells)
11.00 in. (279 mm)
GPS 400W Weight (Unit only)
4.0 lbs. (1.82 kg)
GPS 400W Weight (Installed with rack and back plate)
5.0 lbs. (2.27 kg)
GNC 420W/AW Weight (Unit only)
4.5 lbs. (2.04 kg)
GNC 420W/AW Weight (Installed with rack and back plate)
5.5 lbs. (2.49 kg)
GNS 430W/AW Weight (Unit only)
5.1 lbs. (2.31 kg)
GNS 430W/AW Weight (Installed with rack and back plate)
6.2 lbs. (2.81 kg)
1.4.2 General Specifications
Operating Temperature Range
-20 C to +55 C. For more details see Environmental
Qualification Form on the Dealers Only page on
www.garmin.com. See Appendix A for part numbers.
Humidity
95% non-condensing
Altitude Range
-1,500 ft to 50,000 ft
Input Voltage Range - All Units (Main
Connector)
10 to 33.2 VDC
Input Voltage Range GNC 420W, GNS
430W (COM Connector)
11 to 33 VDC
Input Voltage Range GNC 420AW, GNS
430AW (COM Connector)
24.1 to 33 VDC
GPS 400W (Main Connector)
700 mA @ 28 VDC (maximum)
1.4 A @ 14 VDC (maximum)
GNC 420W, GNC 420AW, (Main Connector)
1.2 A @ 28 VDC (maximum)
2.5 A @ 14 VDC (maximum)
GNS 430W, GNS 430AW, (Main Connector)
1.2 A @ 28 VDC (maximum)
2.5 A @ 14 VDC (maximum)
GNC 420W, GNS 430W (COM Connector)
15 mA @ 28 VDC (receive)
3.0 A @ 28 VDC (transmit)
15 mA @ 14 VDC (receive)
6.0 A @ 14 VDC (transmit)
GNC 420AW, GNS 430AW (COM
Connector)
15 mA @ 28 VDC (receive)
3.0 A @ 28 VDC (transmit)
Superflag Power Requirements
500 mA maximum per superflag output
Environmental Testing
See Environmental Qualification Form on the Dealers
Only page on www.garmin.com. See Appendix A for
part numbers.

Page 1-4 GNS 400W Series Installation Manual
Rev. G 190-00356-08
The display on the 400W Series unit is a sunlight readable LCD display.
Display Size
3.8” diagonal
Active Area
3.29” (W) x 1.75” (H)
Resolution
240 x 128 pixels
Viewing Angle
(with a 2:1 contrast ratio, min)
Left/Right:
Up:
Down:
40
40
40
Viewing Distance
36 inches maximum
1.4.3 GPS Specifications
Number Of Channels
15 (12 GPS and 3 GPS/WAAS/SBAS)
Frequency
1575.42 MHz L1, C/A code
Sensitivity (Acquisition, No
Interference)
-134.5 dBm GPS
-135.5 dBm WAAS
Sensitivity (Drop Lock)
-144 dBm
Dynamic Range
> 20 dB
Lat/Lon Position Accuracy
<1.25 meter RMS horizontal, <2 meter vertical, with WAAS
Velocity
1000 knots maximum (above 60,000 ft)
TTFF (Time To First Fix)
1:45 min. typical with current almanac, position, and time
Reacquisition
10 seconds typical
Position Update Interval
0.2 sec (5 Hz)
1 PPS (Pulse Per Second)
275 Nsec of UTC second
Datum
WGS-84
SATCOM Compatibility
SATCOM compatibility is dependent upon antenna
selection. See Section 1.4.8 for additional information.
Antenna Power Supply
35 mA typical, 40 mA max at 4.7 VDC

GNS 400W Series Installation Manual Page 1-5
190-00356-08 Rev. G
1.4.4 COM Transceiver Specifications (GNC 420W and GNS 430W Only) **
Audio Output
100 mW minimum into a 500 load.
Audio Response
Less than 6 dB of variation between 350 and 2500 Hz.
Audio Distortion
The distortion in the receiver audio output shall not exceed
15% at all levels up to 100 mW.
AGC Characteristics
The audio output will not vary by more than 6 dB when the
level of the RF input signal, modulated 30% at 1000 Hz, is
varied from 5 V to 450,000 V.
Sensitivity
(S+N)/N on all channels shall be greater than 6 dB when the
RF level is 2 V (hard) modulated 30% at 1000 Hz at rated
audio.
Squelch
2 v 6 dB for 25 kHz channels.
3 v 6 dB for 8.33 kHz channels.
Selectivity
6 dB BW is greater than 8 kHz for 25 kHz channeling.
60 dB BW is less than ±25 kHz for 25 kHz channeling.
6 dB BW is greater than ±2.778 kHz for 8.33 kHz channeling.
60 dB BW is less than ±7.37 kHz for 8.33 kHz channeling.
Spurious Response
Greater than 85 dB.
Modulation
AM Double sided, Emission Designator 6K00A3E
Frequency Band
118.00 to 136.99 MHz
25 kHz and 8.33 kHz channel spacing
Transmitting Power
GNS 420W, GNS 430W
10 watts minimum, 15 watts maximum
GNS 420AW, GNS 430W
16 watts minimum, 20 watts maximum
Transmitter Duty Cycle
Recommended 10% maximum.
Modulation Capability
The modulation is not less than 70% and not greater than
98% with a microphone input level of 70 mVrms to 3.0 Vrms.
Carrier Noise Level
At least 45 dB (S+N)/N.
Frequency Stability
0.0005%
Demodulated Audio Distortion
Less than 10% distortion when the transmitter is modulated at
least 70%.
Sidetone
1.4 VRMS into a 500 load when the transmitter is modulated
at least 70%.
Demodulated Audio Response
Less than 6 dB when the audio input frequency is varied from
350 to 2500 Hz.
* C37d Class 4 and 6 may not provide suitable COM transmit range for some high-altitude aircraft.
**Specifications shown apply at nominal input voltages of 13.75 VDC or 27.5 VDC, as applicable, and
with a nominal 50 ohm resistive load at the antenna connector.

Page 1-6 GNS 400W Series Installation Manual
Rev. G 190-00356-08
1.4.5 VOR Specifications (GNS 430W Only)
Receiver Audio Sensitivity
At -103.5 dBm (S+N)/N shall not be less than 6 dB.
Course Deviation Sensitivity
-103.5 dBm or less for 60% of standard deflection.
Flag
The VOR Course Deviation Flag must be flagged:
a) in the absence of an RF signal.
b) in the absence of the 9960 Hz modulation.
c) in the absence of either one of the two 30 Hz modulations.
d) When the level of a standard VOR deviation test signal
produces less than a 50% of standard deflection.
AGC Characteristics
From -99 dBm to -13 dBm input of a Standard VOR Audio Test
Signal, audio output levels shall not vary more than 3 dB.
Spurious Response
Greater than 80 dB.
VOR OBS Bearing Accuracy
The bearing information as presented to the pilot does not have an
error in excess of 2.7° as specified by RTCA DO-196 and EuroCAE
ED-22B.
Audio Output
A minimum 100 mW into a 500 load.
Audio Response
Less than 6 dB of variation between 350 and 2500 Hz. Except the
1020 Hz Ident Tone is at least 20 dB down in voice mode.
Audio Distortion
The distortion in the receiver audio output does not exceed 10% at
all levels up to 100 mW.
1.4.6 LOC Specifications (GNS 430W Only)
Receiver Audio Sensitivity
At -103.5 dBm (S+N)/N shall not be less than 6 dB.
Course Deviation Sensitivity
-103.5 dBm or less for 60% of standard deflection.
Flag
The LOC Course Deviation Flag must be flagged:
a) in the absence of an RF signal.
b) When either the 90 or 150 Hz modulating signals is
removed and the other is maintained at its normal 20%.
c) In the absence of both 90 and 150 Hz modulation.
d) When the level of a standard localizer deviation test signal
produces less than a 50% of standard deflection.
AGC Characteristics
From -86 dBm and -33 dBm input of a Standard VOR Audio Test
Signal, audio output levels does not vary more than 3 dB.
Selectivity
Nose Bandwidth: The input signal level required to produce the
reference AGC voltage does not vary more than 6 dB over the input
signal frequency range of ± 9 kHz from the assigned channel
frequency.
Skirt Bandwidth: The input signal level required to produce
reference AGC voltage will be at least 70 dB greater than the level
required to produce reference AGC voltage at the assigned channel
frequency at ± 36 kHz from the assigned channel frequency.
Spurious Response
Greater than 80 dB.
Centering Accuracy
Typical 0 3 mV (Max error 9.9 mV per RTCA DO-195).
Audio Output
A minimum 100 mW into a 500 load.
Audio Response
Less than 6 dB of Variation between 350 and 2500 Hz. Except the
1020 Hz Ident Tone is at least 20 dB down in voice mode.
Audio Distortion
The distortion in the receiver audio output does not exceed 10% at
all levels up to 100 mW.