Garmin Approach G5 - GPS-Enabled Golf Handheld User manual

G5 User's Manual

INSTALLATION MANUAL
PILOT'S GUIDE
INDEX

© 2016 Garmin Ltd. or its subsidiaries. All rights reserved.
This manual reflects the operation of System Software version 2.20 or later. Some differences
in operation may be observed when comparing the information in this manual to earlier or later
software versions.
Garmin International, Inc., 1200 East 151st Street, Olathe, Kansas 66062, U.S.A.
Tel: [phone] Fax: [phone]
Aircraft On Ground (AOG) Hotline: [phone]
Aviation Dealer Technical Support: 888.606.5482
Garmin AT, Inc.,2345 Turner Road SE, Salem, OR 97302, U.S.A.
Tel: [phone] Fax [phone]
Garmin (Europe) Ltd., Liberty House, Hounsdown Business Park, Southampton, Hampshire
SO40 9LR U.K.
Tel: [phone] Fax: [phone]
Aviation Support: [phone]
Garmin Corporation, No. 68, Zhangshu 2nd Road, Xizhi District, New Taipei City, Taiwan
Tel: [phone] Fax: [phone]
Web Site Address: www.garmin.com
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 written permission of Garmin. Garmin hereby grants permission to download a
single copy of this manual and of any revision to this manual onto a hard drive or other electronic
storage medium to be viewed for personal use, 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.
Garmin
®
is a registered trademark of Garmin Ltd. or its subsidiaries. This trademark may not be
used without the express permission of Garmin.
April, 2016 190-02072-00 Rev. B Printed in the U.S.A.

Garmin G5 User's Manual
190-02072-00 Rev. B
Warnings, Cautions & Notes
BATTERY WARNINGS:
If these guidelines are not followed, the lithium-ion battery may experience
a shortened life span or may present a risk of damage to the device, fire,
chemical burn, electrolyte leak, and/or injury.
• Do not leave the battery exposed to a heat source or in a high
temperature environment. To help prevent damage, store the battery
out of direct sunlight.
• For maximum battery longevity, store within a temperature range of
32˚ to 77˚F (from 0˚ to 25˚C).
• Do not use a sharp object to remove the battery.
• Do not disassemble, puncture, damage, or incinerate the device or
battery.
• Keep the battery away from children.
• Only replace the battery with the approved replacement from Garmin.
Using another battery presents a risk of fire or explosion. To purchase
a replacement battery, see you Garmin dealer or the Garmin website.
• Contact your local waste disposal department to dispose of the device
and battery in accordance with applicable local laws and regulations.
WARNING: To reduce the risk of unsafe operation, carefully review and
understand all aspects of the G5 User's Manual documentation and the Pilot’s
Operating Handbook of the aircraft.Thoroughly practice basic operation prior
to actual use. During flight operations, carefully compare indications from
the G5 to all available flight displays. For safety purposes, always resolve any
discrepancies.
WARNING: The altitude calculated by the G5 internal GPS receiver is geo-
metric height above Mean Sea Level and could vary significantly from the
altitude displayed by pressure altimeters. Always use the pressure altitude
display, when available, for determining or selecting aircraft altitude.
WARNING: The United States government operates the Global Positioning
System and is solely responsible for its accuracy and maintenance. The GPS
system is subject to changes which could affect the accuracy and performance
of all GPS equipment.

Garmin G5 User's Manual
190-02072-00 Rev. B
Warnings, Cautions & Notes
WARNING: For safety reasons, the G5 operational procedures must be learned
on the ground.
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 Proposition
65. If you have any questions or would like additional information, please
refer to our website at www.garmin.com/prop65
CAUTION: The display uses a lens with a special coating that may be sensitive
to skin oils, waxes, and abrasive cleaners.CLEANERS CONTAINING AMMONIA
WILL HARMTHE ANTI-REFLECTIVE COATING. It is very important to clean the
lens using a clean, lint-free cloth and a cleaner that is specified as safe for
anti-reflective coatings. Avoid any chemical cleaners or solvents that can
damage plastic components.
CAUTION: The G5 does not contain any user-serviceable parts.Repairs should
only be made by an authorized Garmin service center. Unauthorized repairs
or modifications could result in permanent damage to the equipment and
void both the warranty and the authority to operate this device under FAA,
FCC, and other applicable regulations.
NOTE: The G5 is a non-TSO certified product that has not received FAA
approval or endorsement. Consequently the G5 is not type-certificated and
is not suitable for installation in type-certificated aircraft.
NOTE: The term LRU, as used throughout this manual is an abbreviation for
Line Replaceable Unit. LRU is used generically in aviation for a product (such
as a GSA 28 or GMC 307) that can be readily "swapped out" (usually as a
single component) for troubleshooting/repair.

Garmin G5 User's Manual
190-02072-00 Rev. B
Warnings, Cautions & Notes
NOTE: The G5 has a very high degree of functional integrity. However, the
pilot must recognize that providing monitoring and/or self-test capability for
all conceivable system failures is not practical. Although unlikely, it may be
possible for erroneous operation to occur without a fault indication shown by
the G5. It is thus the responsibility of the pilot to detect such an occurrence
by means of cross-checking with all redundant or correlated information
available in the cockpit.
NOTE: All visual depictions contained within this document, including screen
images of the G5 display, are subject to change and may not reflect the most
current G5 functionality.
NOTE: Use of polarized eyewear may cause the display to appear dim or
blank.

Garmin G5 User's Manual
190-02072-00 Rev. B
Warnings, Cautions & Notes
FCC
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions: (1) this device may not cause harmful interference, and (2) this device must accept
any interference received, including interference that may cause undesired operation.
This equipment has been tested and found to comply with the limits for a Class B digital
device pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference in a residential installation. This equipment generates,
uses, and can radiate radio frequency energy and if not installed and used in accordance with
the instructions, may cause harmful interference to radio communications. However, there is
no guarantee that interference will not occur in a particular installation. If this equipment
does cause harmful interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the interference by
one of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
LICENSE AGREEMENT AND WARRANTY
ContaCt Garmin
Contact Garmin if you have any questions while using the G5. In the USA contact Garmin
Product Support by phone: [phone] or [phone], Monday–Friday, 8 AM–5 PM
Central Time; or go to www.garmin.com/support.
In Europe, contact Garmin (Europe) Ltd. at +44 (0) 870.8501241 (outside the UK) or 0808
2380000 (within the UK).

Garmin G5 User's Manual
190-02072-00 Rev. B
Warnings, Cautions & Notes
Software LiCenSe aGreement
BY USING THE G5, YOU AGREE TO BE BOUND BY THE TERMS AND CONDITIONS OF THE
FOLLOWING SOFTWARE LICENSE AGREEMENT. PLEASE READ THIS AGREEMENT CAREFULLY.
Garmin grants you a limited license to use the software embedded in this device (the
“Software”) in binary executable form in the normal operation of the product. Title,
ownership rights, and intellectual property rights in and to the Software remain with Garmin.
You acknowledge that the Software is the property of Garmin and is protected under the
United States of America copyright laws and international copyright treaties. You further
acknowledge that the structure, organization, and code of the Software are valuable trade
secrets of Garmin and that the Software in source code form remains a valuable trade secret
of Garmin. You agree not to decompile, disassemble, modify, reverse assemble, reverse
engineer, or reduce to human readable form the Software or any part thereof or create any
derivative works based on the Software. You agree not to export or re-export the Software to
any country in violation of the export control laws of the United States of America.
Limited warranty
The Garmin G5 and other G3X LRUs are warranted to be free from defects in materials or
workmanship for two years from the date of purchase. Within the applicable 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 apply
to: (i) cosmetic damage, such as scratches, nicks and dents; (ii) consumable parts, such as
batteries, unless product damage has occurred due to a defect in materials or workmanship;
(iii) damage caused by accident, abuse, misuse, water, flood, fire, or other acts of nature
or external causes; (iv) damage caused by service performed by anyone who is not an
authorized service provider of Garmin; or (v) damage to a product that has been modified
or altered without the written permission of Garmin. In addition, Garmin reserves the right
to refuse warranty claims against products or services that are obtained and/or used in
contravention of the laws of any country.
THE WARRANTIES AND REMEDIES CONTAINED HEREIN ARE EXCLUSIVE AND IN LIEU OF
ALL OTHER WARRANTIES, WHETHER EXPRESS, 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.

Garmin G5 User's Manual
190-02072-00 Rev. B
Warnings, Cautions & Notes
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 THE 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 (with a new or newly-overhauled
replacement product) the product or software 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.
Online Auction Purchases: Products purchased through online auctions are not eligible for
warranty coverage. Online auction confirmations are not accepted for warranty verification.
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.
International Purchases: A separate warranty may be provided by international
distributors for devices purchased outside the United States depending on the country. If
applicable, this warranty is provided by the local in-country distributor and this distributor
provides local service for your device. Distributor warranties are only valid in the area of
intended distribution. Devices purchased in the United States or Canada must be returned to
the Garmin service center in the United Kingdom, the United States, Canada, or Taiwan for
service.

Garmin G5 User's Manual
190-02072-00 Rev. B
Part Number Change Summary
190-02072-00 Initial release.
Rev Date Description
A April, 2016 Production Release.
B April, 2016 Updates to Installation Manual section.

Garmin G5 User's Manual
190-02072-00 Rev. B i
Table of Contents
Section 1 Installation Manual.............................................................................................. 1
1.1 Installation Information .................................................................................................. 1
1.1.1 G5 Overview.............................................................................................................. 1
1.1.2 Inventory of Materials ................................................................................................ 1
1.1.3 Unpacking the Unit .................................................................................................... 2
1.1.4 Required Garmin Equipment....................................................................................... 2
1.1.5 Required non-Garmin Equipment................................................................................ 3
1.1.6 Optional Equipment (non-LRU)................................................................................... 4
1.1.7 Garmin Software and Documents ............................................................................... 4
1.2 Installation Preparation .................................................................................................. 5
1.2.1 Electrical Considerations............................................................................................. 5
1.2.2 Wiring/Cabling Considerations.................................................................................... 6
1.2.3 Mechanical Considerations....................................................................................... 10
1.3 G5 Installation ................................................................................................................. 12
1.3.1 Primary Functions..................................................................................................... 12
1.3.2 General Specifications .............................................................................................. 13
1.3.3 Installation Information ............................................................................................ 13
1.3.4 Unit Installation ....................................................................................................... 14
1.3.5 Antennas ................................................................................................................. 18
1.3.6 Mounting Instructions .............................................................................................. 19
1.3.7 Outline and Installation Drawings............................................................................. 23
1.4 GPS Antenna Installation .............................................................................................. 27
1.4.1 Non-Garmin Antennas.............................................................................................. 28
1.4.2 Garmin Antennas ..................................................................................................... 29
1.5 G5 Pinout............................................................................................................................ 30
1.5.1 J51 .......................................................................................................................... 30
1.6 G5 Interconnect Drawings............................................................................................. 32
1.7 G5 Configuration and Post Installation Checkout ................................................... 35
1.7.1 Recommended Test Equipment ................................................................................. 36
1.7.2 Configuration Mode ................................................................................................. 36
1.7.3 Software Loading Procedure..................................................................................... 36
1.7.4 Configuration Pages................................................................................................. 37
1.8 Troubleshooting .............................................................................................................. 80
1.8.1 General Troubleshooting........................................................................................... 80
1.8.2 SD Card Slot ............................................................................................................ 81
1.8.3 Air Data Troubleshooting .......................................................................................... 82
1.8.4 Attitude failure Troubleshooting................................................................................ 82
1.8.5 G5 Data Logging...................................................................................................... 83
1.8.6 Sending Troubleshooting Data to Garmin.................................................................. 83
1.9 Maintenance..................................................................................................................... 84
1.9.1 Inspections/Continued Airworthiness/Maintenance.................................................... 84
1.9.2 Return to Service Information ................................................................................... 85
1.10 Performance Specifications/Licensing/Compliance............................................... 86
1.10.1 GPS specifications .................................................................................................. 86

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Table of Contents
1.10.2 Environmental Specifications ................................................................................. 86
1.10.3 Performance Specifications ..................................................................................... 87
Section 2 Pilot's Guide........................................................................................................... 89
2.1 Bezel Overview ................................................................................................................ 89
2.2 micro-SD™Cards................................................................................................................ 90
2.3 System Power-up ............................................................................................................ 90
2.4 Operation.......................................................................................................................... 91
2.4.1 G5 Annunciations..................................................................................................... 91
2.4.2 G5 Attitude.............................................................................................................. 91
2.4.3 G5 Heading ............................................................................................................. 92
2.4.4 Backlight Intensity.................................................................................................... 92
2.5 Accessing Functionality ................................................................................................. 93
2.5.1 Pages....................................................................................................................... 93
2.5.2 Menu....................................................................................................................... 94
2.6 PFD Page ........................................................................................................................... 95
2.6.1 Airspeed Indicator .................................................................................................... 96
2.6.2 Attitude Indicator ..................................................................................................... 98
2.6.3 Altimeter.................................................................................................................. 99
2.6.4 Turn Rate Indicator ................................................................................................. 102
2.6.5 Heading/Ground Track (PFD Page)........................................................................... 103
2.6.6 Vertical Speed Indicator (VSI) .................................................................................. 105
2.6.7 PFD Pitch Attitude Offset ........................................................................................ 105
2.6.8 Battery Status Indicator .......................................................................................... 106
2.7 HSI Page .......................................................................................................................... 107
2.7.1 Horizontal Situation Indicator (HSI)......................................................................... 108
2.7.2 Heading/Ground Track (HSI Page) ........................................................................... 110
2.8 Navigation ...................................................................................................................... 111
2.8.1 Course Deviation Indicator (CDI)............................................................................. 111
2.8.2 Vertical Deviation Indicator and VNAV Indicator ...................................................... 112
2.8.3 Course Selection .................................................................................................... 115
2.9 Automatic Flight Control System (Optional) .......................................................... 116
2.9.1 AFCS System Architecture ...................................................................................... 116
2.9.2 Control Wheel Steering (CWS) (Optional) ................................................................ 118
2.9.3 G5 AFCS Status Box ............................................................................................... 118
2.9.4 G5 AFCS Configuration........................................................................................... 119
2.9.5 AFCS Operation...................................................................................................... 120
2.9.6 AFCS PRE-FLIGHT Actions (Standalone Installation)................................................. 121
2.9.7 AFCS Controls........................................................................................................ 122
2.9.8 Flight Director Operation ........................................................................................ 127
2.9.9 Vertical Modes ....................................................................................................... 133
2.9.10 Lateral Modes ...................................................................................................... 144
2.10 System Messages........................................................................................................ 151
Index...................................................................................................................................Index-1

Garmin G5 User's Manual
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Installation Manual Pilot's Guide Index
SECTION 1 INSTALLATION MANUAL
1.1 INSTALLATION INFORMATION
1.1.1 G5 OVERVIEW
The G5 is an electronic instrument display capable of operating as a standalone flight
display or a fully integrated backup instrument for G3X systems. It features a bright,
sunlight readable, 3.5-inch color display which is sized to fit in a standard 3-1/8-inch
instrument cutout. With integrated attitude/air data sensors and GPS, the G5 replaces
traditional electromechanical standby instruments by combining essential information
into one easy-to-read display. The G5 additionally provides backup autopilot control
allowing coupled GPS approaches to be flown or continued in the event of primary
flight display shutdown. In the case of aircraft power loss, the optional battery backup
sustains the G5 flight display with up to 4 hours of emergency power. Two G5 units
installed in the same aircraft will communicate with one another and with the G3X
system.
1.1.2 INVENTORY OF MATERIALS
This manual provides all of the mechanical and electrical information required for
the installation of the G5. This manual is intended to be a step-by-step guide to the
installation, therefore it is important that the steps in all sections be performed in
order. All materials that are required/optional for the installation of the G5 are listed
in this section (as such, some of the information in this section is repeated in following
sections).
Before beginning the G5 installation, it is recommended that the installer perform a
complete inventory of all materials listed in this section (some materials are optional
and may not be applicable to the installation). Section 1.1 should be used to verify
that all components ordered from Garmin have been delivered correctly, and to identify
any required materials that are not provided by Garmin.

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1.1.3 UNPACKING THE UNIT
Carefully unpack the equipment and make a visual inspection of all contents for
evidence of damage incurred during shipment. If any component of the G5 is damaged,
notify the carrier and file a claim. To justify a claim, save the original shipping container
and all packing materials. Do not return any equipment to Garmin until the carrier has
authorized the claim.
Retain the original shipping containers for storage. If the original containers are not
available, a separate cardboard container should be prepared that is large enough to
accommodate sufficient packing material to prevent movement.
1.1.4 REQUIRED GARMIN EQUIPMENT
1.1.4.1 G5 INSTALLATION EQUIPMENT
Table 1-1 G5 Installation Equipment
LRU Assembly Part Number Unit Only Part Number
G5, Unit Only 010-01485-00 011-03809-00
Installation Kit, G5 010-12493-10 011-03892-00
Battery Pack, G5 010-12493-00 011-03893-00
1.1.4.2 OPTIONAL GPS ANTENNA
A Garmin or non-Garmin GPS antenna is optional for G5 installations when not
using the G5's internal GPS antenna. See Section 1.4 for supported antennas and
antenna requirements.

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1.1.4.3 OPTIONAL GARMIN LRUS
The G5 can be installed in a standalone configuration or as part of the G3X system.
Optional Garmin LRUs (Line Replaceable Units) that can be installed with the G5 in the
standalone configuration are listed below. If any of these LRUs are to be used in this
installation, verify that all required installation materials such as connector kits have
been acquired. Refer to the G3X Installation Manual (190-01115-01) for additional
installation information for these LRUs and for the G3X system.
Optional Garmin LRUs:
•GAD29ARINC429Adapter
•GMC305ModeController
•GMC307ModeController
•GSA28ServoActuator
1.1.5 REQUIRED NON-GARMIN EQUIPMENT
1.1.5.1 WIRING/CABLING CONSIDERATIONS
The installer will provide all wiring and cabling unless otherwise noted.
1.1.5.2 CONTACT AND CRIMP TOOLS
Table 1-2 lists recommended crimp tools used to build the wiring harnesses for the
G5, other equivalent tooling may also be used.
Table 1-2 Pin Contact and Crimp Tools Part Numbers
Contact Type Garmin Contact
Part Number
Recommended
Positioner
Recommended
Insertion/
Extraction Tool
Recommended
Hand Crimping
Tool
Socket, Size 20,
20-24 AWG
336-00022-02 M22520/2-08,
Daniels K13-1
M81969/1-04 for
size 22D pins and
M81969/1-02 for
size 20 pins
M22520/2-01
NOTE: Non-Garmin part numbers shown are not maintained by Garmin and
consequently are subject to change without notice.

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1.1.5.3 BNC CONNECTORS
BNC connectors may be required to terminate the antenna cable, depending upon
which antenna is used. Check the GPS antenna installation instructions for detailed
information.
1.1.5.4 HEX DRIVER
A 3/32” hex drive tool is required to secure the G5 to the panel as described in
Section 1.3, G5 Installation.
1.1.5.5 SD CARD
A microSD™ card can be used with the G5 for software updates and data logging.
Garmin recommends SanDisk® brand SD cards up to 32 GB.
1.1.5.6 PNEUMATIC HOSES AND CONNECTORS
Air hoses and fittings are required to connect pitot and static air to the G5. The
G5 has a female 1/8-27 ANPT fitting for each pitot and static port. Use appropriate
aircraft fittings to connect to pitot and static system lines.
1.1.6 OPTIONAL EQUIPMENT (NON-LRU)
1.1.6.1 ANTENNA BRACKETS/DOUBLER PLATES
See the G3X Installation Manual (190-01115-01) for detailed information.
1.1.6.2 SILICON FUSION TAPE
Use Garmin Part Number 249-00114-00 or similar to wrap the wiring/cable bundles.
1.1.7 GARMIN SOFTWARE AND DOCUMENTS
The G5 unit software and a panel cut-out DXF file are available for free download
from www.garmin.com.

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1.2 INSTALLATION PREPARATION
This section provides electrical and mechanical information needed for planning the
physical layout of the G5 installation. Use the information in Section 1.2 to become
familiar with all aspects of the installation before actually beginning the physical
installation of any equipment into the aircraft. Garmin recommends that the installer
become familiar with all sections of this document before beginning the installation.
In general terms, the below steps are recommended to be followed in order.
1) Inventory of all needed parts
2) Planning/layout of the installation
3) Installation of LRUs, antennas, and sensors
4) Construction of wiring harness, cables, and connectors
5) Software installation/configuration
6) Post-installation checkout procedure and calibration
1.2.1 ELECTRICAL CONSIDERATIONS
This section presents information required for planning the electrical layout of the
G5 installation.
CAUTION: To avoid damage to the G5 and other LRUs, take precautions
to prevent Electro-Static Discharge (ESD) when handling connectors and
associated wiring. ESD damage can be prevented by touching an object that
is of the same electrical potential as the LRU before handling the LRU itself.

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1.2.1.1 POWER SPECIFICATIONS
The G5 is capable of operating at either 14 or 28 VDC. Table 1-3 lists the supply
voltage and current draw information for the G5. Use this information when
determining power supply requirements. All installed electrical appliances must be
considered when determining total power requirements.
The specified current draw listed in Table 1-3 is measured with the display backlight
set to 100%.
Table 1-3 G5 Power Requirements
14 V (Maximum) 14 V (Typical) 28 V (Maximum) 28 V (Typical)
3.4 W, 0.250 Amp 2.8 W, 0.200 Amp 3.4 W, 0.125 Amp 2.80 W, 0.100 Amp
1.2.2 WIRING/CABLING CONSIDERATIONS
Section 1.5 lists the pin information for the G5 and Section 1.6 contains interconnect
drawings. It is recommended that all LRUs be installed prior to constructing the wiring
harnesses and cables.
Use MIL-W-22759/16 (or other approved wire) AWG #22 or larger wire for all
connections unless otherwise specified. The supplied standard pin contacts are
compatible with up to AWG #20 wire. In cases where some installations have more
than one LRU sharing a common circuit breaker, sizing and wire gauge is based on
aircraft circuit breaker layout, length of wiring, current draw on units, and internal unit
protection characteristics. Do not attempt to combine more than one unit on the same
circuit breaker.
RG400 or RG142 coaxial cable with 50 Ωnominal impedance and meeting
applicable aviation regulations should be used when installing an optional external
GPS antenna.

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1.2.2.1 WIRING HARNESS INSTALLATION
Use cable meeting the applicable aviation regulation for the interconnect wiring.
Any cable meeting specifications is acceptable for the installation. When routing
cables, observe the following precautions:
• Allcableroutingshouldbekeptasshortandasdirectaspossible.
• Checkthatthereisamplespaceforthecablingandmatingconnectors.
• Avoidsharpbendsincabling.
• Avoidroutingnearaircraftcontrolcables.
• Avoidroutingcablesnearheatsources,RFsources,EMIinterferencesources,
powersources(e.g.400Hzgenerators,trimmotors,etc.)ornearpowerfor
uorescentlighting.
• RoutetheGPSantennacableasfaraspossibleawayfromallCOM
transceiversandotherantennacables.
The installer shall supply and fabricate all of the cables. Electrical connections
are made through the D subminiature connector. Section 1.5 defines the electrical
characteristics of all input and output signals. Required connectors and associated
hardware are supplied with the connector kit.
Contacts for the connectors must be crimped onto the individual wires of the aircraft
wiring harness.
Table 1-2 lists contact part numbers (for reference) and recommended crimp tools.
CAUTION: Check wiring connections for errors before connecting any wiring
harnesses. Incorrect wiring could cause internal component damage.

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1.2.2.2 BACKSHELL ASSEMBLY
The installation kit includes the backshell assembly. Garmin’s backshell connectors
give the installer the ability to quickly and easily terminate shield grounds at the
backshell housing. Instructions needed to install the Jackscrew Backshell and Shield
Block Ground can be found in the G3X Installation Manual (190-01115-01).
1.2.2.3 CAN BUS CONSIDERATIONS
The CAN (controller area network) bus (Figure 1-1) is an interface format used to
establish communication between several LRUs. Each end of the CAN Bus “backbone”
must be terminated by a 120 Ωresistor. Each node length (distance from CAN bus
backbone to each LRU) must be 0.3 meters or less in length (keeping the node lengths
as short as practicable is recommended). There is no minimum node length.
The G5 installation kit provides a DB-9 CAN Bus terminator that contains a 120 Ohm
resistor connected between pins 1 and 2 (Figure 1-2). The GSA 28 servos contain a
120 Ohm resistor inside the unit that provides the termination when pin 3 is connected
(outside of the unit) to pin 4 (Figure 1-3).
NOTE: Use only two CAN Bus terminations per installation. Using less than or
more than two terminations (one at each end of the backbone) will make the CAN
Bus unusable or unreliable.
R
L
R
L
CAN Bus Backbone
CAN HI
CAN LOW
(Node #1)
LRU
(Node #2)
LRU
(Node #3)
LRU
(Node #n)
LRU
Node Length
0.3 meter max.
Figure 1-1 CAN Bus Configuration