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Garmin GDU 37X Installation Manual

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GDU 37X

Installation Manual

190-01054-01
May, 2014
Revision D

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Summary of Contents for Garmin GDU 37X

  • Page 1: Installation Manual

    GDU 37X Installation Manual 190-01054-01 May, 2014 Revision D...
  • Page 2 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...
  • Page 3 3-1 – 3-28 Section 4 4-1 – 4-16 Section 5 5-1 – 5-2 Appendix A A-1 – A-4 Appendix B B-1 – B-14 Appendix C C-1 – C-5 Appendix D D-1 – D-2 190-01054-01 GDU 37X Installation Manual Rev. D Page i...
  • Page 4 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. NOTE References to the GDU 37X throughout this manual apply equally to the GDU 370 and GDU 375 except where specifically noted. 190-01054-01 GDU 37X Installation Manual Rev.

  • Page 5: Aviation Limited Warranty

    (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.

  • Page 6: Table Of Contents

    Section 1 GDU 37X Installation Overview ..........1-1 1.1 Unpacking Unit........................ 1-1 1.2 Introduction........................1-1 1.3 System Overview ......................1-2 1.4 General GDU 37X LRU Specifications................1-2 1.5 Mounting.......................... 1-4 1.6 Wiring/Cabling Considerations ..................1-4 Section 2 GDU 37X ..................2-1 2.1 Equipment Description ....................2-1 2.2 Electrical Specifications ....................

  • Page 7: Paragraph Page

    PARAGRAPH PAGE Appendix B Connector Installation Instructions..........B-1 B.1 Jackscrew Backshell Installation Instructions..............B-1 Appendix C Outline and Installation Drawings..........C-1 Appendix D Interconnect Drawing (example only) ........D-1 190-01054-01 GDU 37X Installation Manual Rev. D Page v...
  • Page 8 Section 2 GDU 37X .....................2-1 Figure 2-1. GDU 37X ......................2-1 Figure 2-2. GDU 37X Mounting Accessories ..............2-5 Figure 2-3. GDU 37X Panel Cutout Template ..............2-7 Section 3 Garmin GPS/XM Antennas...............3-1 Figure 3-1. Recommended Antenna Placement ..............3-5 Figure 3-2.
  • Page 9 Figure C-2.2 GA 56 Installation Drawing ................C-4 Figure C-2.3 GA 57X Installation Drawing .................C-5 Appendix D Interconnect Drawing (example only)........D-1 Figure D-1.1 GDU 37X Interconnect Drawing ..............D-1 Figure D-1.2 GDU 37X Interconnect Drawing ..............D-2 190-01054-01 GDU 37X Installation Manual Rev.
  • Page 10 Table 2-3 GDU 37X GPS Specifications ................2-2 Table 2-4 GDU 37X Supported Antennas ................2-3 Table 2-5 GDU 37X Required Accessories................2-4 Table 2-6 Contents of GDU 37X Connector Kit (011-01921-00)*........2-4 Section 3 Garmin GPS/XM Antennas...............3-1 Table 3-1 GPS Antennas...................... 3-1 Table 3-2 GPS Antenna Minimum Requirements ..............

  • Page 11: Gdu 37X Installation Overview

    If the unit 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 the unit to Garmin until the carrier has authorized the claim.

  • Page 12: System Overview

    1.3 System Overview The GDU 37X is a Non-TSO’d multifunction display designed for retrofit installation in light sport (LSA) and experimental aircraft. It features a built-in XM weather audio receiver (GDU 375 only), 7” WVGA high-resolution screen, and dual power inputs.

  • Page 13: Table 1-3 Gdu 37X Lru Power Requirements

    (0.843 kg) 1.4.4 Cooling Requirements While no forced cooling air is required for the GDU 37X, it is highly recommended that the air behind the panel be kept moving (by ventilation or a fan). NOTE Avoid installing the GDU 37X LRUs near heat sources. If this is not possible, ensure that additional cooling is provided.

  • Page 14: Mounting

    The installer shall supply and fabricate all of the cables. The connector is available in the GDU 37X Connector Kit (011-01921-00). Electrical connections are made through D subminiature connectors for the GDU 37X units.
  • Page 15 Avoid routing cables near power sources (e.g., 400 Hz generators, trim motors, etc.) or near power for fluorescent lighting. • Route the GPS antenna cable as far as possible away from all COM transceivers and antenna cables. 190-01054-01 GDU 37X Installation Manual Rev. D Page 1-5...

  • Page 16: Figure 1-1. Tnc Connector Installation

    1.6.3 Backshell Assemblies Connector kits include backshell assemblies. Garmin’s backshell connectors give the installer the ability to quickly and easily terminate shield grounds at the backshell housing. The instructions needed to assemble the backshell connector w/Shield Block grounding system are located in...

  • Page 17: Gdu 37X

    The GDU 37X is not suitable for installation in a type-certificated aircraft. The GDU 37X is mounted flush to the aircraft instrument panel using four #6 screws. The GDU 37X is available in two models, GDU 370 and GDU 375. The GDU 370 is a Garmin Display Unit with a GPS receiver.

  • Page 18: Electrical Specifications

    15W, 0.540 Amp 9.25W, .330 Amp 2.2.3 GPS Specifications The GDU 37X uses a high-sensitivity GPS receiver that continuously tracks and uses up to 12 satellites to compute and update its position. Table 2-3 GDU 37X GPS Specifications Characteristics Specifications...

  • Page 19: Table 2-4 Gdu 37X Supported Antennas

    2.2.4 Antennas Table 2-4 lists Garmin and non-Garmin antennas currently supported by the GDU 37X. Refer to Section 3 for Garmin antenna installation information. For non-Garmin antennas, follow the manufacturer’s installation instructions. Table 2-4 GDU 37X Supported Antennas Mount Antenna...

  • Page 20: Environmental Specifications

    Installation Requirements 2.4.1 Required Accessories Each of the following accessories is provided with the GDU 37X unit. The connector kit is required to install the unit (Figure 2-2). The GDU 37X Nutplate is available to reinforce the panel cutout in thin panel installations.

  • Page 21: Figure 2-2. Gdu 37X Mounting Accessories

    2.4.2 Additional Equipment Required A 3/32” hex drive tool is required to secure the GDU 37X to the panel as described in Section 2.7 Unit Installation. CONNECTOR KIT 011-01921-00 GDU 37x UNIT 011-01747-( ) Figure 2-2. GDU 37X Mounting Accessories...

  • Page 22: Installation Considerations

    2.7 Unit Installation The GDU 37X is installed by holding the unit flush with the instrument panel and fastening the four captured 3/32” hex socket head screws to the panel as shown in Figure C-1.1 Figure C-1.2.

  • Page 23: Figure 2-3. Gdu 37X Panel Cutout Template

    5.57 in [141.4 mm] For corner holes, center punch and drill (#36) / tap (6/32) to create threaded holes drill out with 25 drill bit and use Garmin nut-plate P/N 115-01054-00 Figure 2-3. GDU 37X Panel Cutout Template 190-01054-01 GDU 37X Installation Manual Rev.

  • Page 24: Garmin Gps/Xm Antennas

    3 GARMIN GPS/XM ANTENNAS For non-Garmin antennas, follow the manufacturer’s installation instructions. If using a Garmin GA 26C or GA 26XM, refer to the accompanying installation instructions (190-00082-00 or 190-00522-03). For GA 55/55A, GA 56, or GA 57X antennas, refer to this section.

  • Page 25: Xm Antennas

    The information in this section does not pertain to in-cabin (internal) mounted antennas such as the GA 26C, refer to the accompanying installation instructions (190-00082-00). No special precautions need be taken to provide an electrical bonding path between the GPS Antenna and the aircraft structure. 190-01054-01 GDU 37X Installation Manual Rev. D Page 3-2...
  • Page 26 GPS receiver. However, placement of the GPS antenna relative to a COM transceiver and COM antenna, ELT antenna, and DF receiver antenna is critical. Use the following guidelines, in addition to others in this document, when locating the GDU 37X and its antennas.
  • Page 27 NOTE The separation requirement does not apply to GPS and COM combination antennas, provided the antenna has been tested to meet Garmin’s minimum performance standards. The separating requirement includes the combination with an XM antenna element as well. 4a) The GPS antenna should be mounted no closer than two feet (edge to edge) and ideally three feet from any antennas emitting more than 25 watts of power.

  • Page 28: Figure 3-1. Recommended Antenna Placement

    Figure 3-1 shows the recommended placement of antennas. Figure 3-1. Recommended Antenna Placement 190-01054-01 GDU 37X Installation Manual Rev. D Page 3-5...

  • Page 29: Figure 3-2. Carbon/Glass Buried Antenna Area

    Modifications of this sort are not rec- ommended or inferred by Garmin or the installation of the GDU 37X, and the installer should seek the guidance of the kit manufacture for such modifications.

  • Page 30: Figure 3-3. Glare Shield Buried Antenna Area

    The bottom of the antenna does not need to make contact with the ground plane (i.e. the surface may be painted). The antenna will capacitively couple to the ground plane beneath the paint or aircraft cover. 190-01054-01 GDU 37X Installation Manual Rev. D Page 3-7...

  • Page 31: Teardrop Footprint Antenna Installation (Ga 55 And Ga 56)

    This section describes the structural mounting of the teardrop footprint antenna installation. An acceptable installation method is to use Garmin P/N: 115-00846-10 doubler plate with the GA 55 or GA 56 stud mount antennas. Another acceptable method is to fabricate and install one of three doublers...

  • Page 32: Figure 3-4. Doubler Design, Teardrop Footprint Antenna, Skin Thickness

    These sealants may damage the electrical connections to the antenna. Use of these type sealants may void the antenna warranty. 3.4.3 Reference Figures Figure 3-4. Doubler Design, Teardrop Footprint Antenna, Skin Thickness 0.032" to 0.049" 190-01054-01 GDU 37X Installation Manual Rev. D Page 3-9...

  • Page 33: Figure 3-5. Doubler Design, Teardrop Footprint Antenna, Skin Thickness 0.049" To 0.051

    Figure 3-5. Doubler Design, Teardrop Footprint Antenna, Skin Thickness 0.049" to 0.051" Figure 3-6. Doubler Design, Teardrop Footprint Antenna, Skin Thickness 0.051" to 0.063" 190-01054-01 GDU 37X Installation Manual Rev. D Page 3-10...

  • Page 34: Figure 3-7. Sample Doubler Location, Teardrop Footprint Antenna, Metal Skin Aircraft

    Figure 3-7. Sample Doubler Location, Teardrop Footprint Antenna, Metal Skin Aircraft Figure 3-8. Skin Cutout Detail, Teardrop Footprint Antenna, Skin Thickness 0.032" to 0.049" 190-01054-01 GDU 37X Installation Manual Rev. D Page 3-11...

  • Page 35: Figure 3-9. Skin Cutout Detail, Teardrop Footprint Antenna, Skin Thickness 0.049" To 0.051

    Figure 3-9. Skin Cutout Detail, Teardrop Footprint Antenna, Skin Thickness 0.049" to 0.051" Figure 3-10. Skin Cutout Detail, Teardrop Footprint Antenna, Skin Thickness 0.051" to 0.063" 190-01054-01 GDU 37X Installation Manual Rev. D Page 3-12...

  • Page 36: Figure 3-11. Doubler Installation, Teardrop Footprint Antenna, Skin Thickness 0.032" To 0.049

    Figure 3-11. Doubler Installation, Teardrop Footprint Antenna, Skin Thickness 0.032" to 0.049" Figure 3-12. Doubler Installation, Teardrop Footprint Antenna, Skin Thickness 0.049" to 0.051" 190-01054-01 GDU 37X Installation Manual Rev. D Page 3-13...

  • Page 37: Arinc 743 Footprint Antenna Installation (Ga 55A, Ga 57X)

    This section describes the structural mounting of the ARINC 743 footprint antenna (GA 55A, GA 57X) installation. One acceptable method is to use Garmin P/N: 115-00846-00 doubler plate. Another acceptable method is to fabricate and install one of three doublers,...
  • Page 38 2. For installation in aircraft skins of thickness less than 0.051”, countersink the rivet holes in the doubler for use with flush head rivets (MS20426AD4-x). 3. When using Garmin P/N: 115-00846-00 doubler, sixteen rivet holes exist in the part. For installation of Garmin P/N: 115-00846-00 in skins of thickness between 0.032” and 0.049”, only...

  • Page 39: Figure 3-14. Doubler Design, Arinc 743 Footprint Antenna, Skin Thickness 0.032" To 0.049

    3.5.3 Reference Figures Figure 3-14. Doubler Design, ARINC 743 Footprint Antenna, Skin Thickness 0.032" to 0.049" 190-01054-01 GDU 37X Installation Manual Rev. D Page 3-16...

  • Page 40: Figure 3-15. Doubler Design, Arinc 743 Footprint Antenna, Skin Thickness 0.049" To 0.051

    Figure 3-15. Doubler Design, ARINC 743 Footprint Antenna, Skin Thickness 0.049" to 0.051" 190-01054-01 GDU 37X Installation Manual Rev. D Page 3-17...

  • Page 41: Figure 3-16. Doubler Design, Arinc 743 Footprint Antenna, Skin Thickness 0.051" To 0.063

    Figure 3-16. Doubler Design, ARINC 743 Footprint Antenna, Skin Thickness 0.051" to 0.063" 190-01054-01 GDU 37X Installation Manual Rev. D Page 3-18...

  • Page 42: Figure 3-17. Sample Doubler Location, Arinc 743 Antenna, Metal Skin Aircraft

    Figure 3-17. Sample Doubler Location, ARINC 743 Antenna, Metal Skin Aircraft Figure 3-18. Skin Cutout Detail, ARINC 743 Footprint Antenna, Skin Thickness 0.032" to 0.049" 190-01054-01 GDU 37X Installation Manual Rev. D Page 3-19...

  • Page 43: Figure 3-19. Skin Cutout Detail, Arinc 743 Footprint Antenna, Skin Thickness 0.049" To 0.051

    Figure 3-19. Skin Cutout Detail, ARINC 743 Footprint Antenna, Skin Thickness 0.049" to 0.051" Figure 3-20. Skin Cutout Detail, ARINC 743 Footprint Antenna, Skin Thickness 0.051" to 0.063" 190-01054-01 GDU 37X Installation Manual Rev. D Page 3-20...

  • Page 44: Figure 3-21. Doubler Installation, Arinc 743 Footprint Antenna, Skin Thickness 0.032" To 0.049

    Figure 3-21. Doubler Installation, ARINC 743 Footprint Antenna, Skin Thickness 0.032" to 0.049" Figure 3-22. Doubler Installation, ARINC 743 Footprint Antenna, SkinThickness 0.049" to 0.051" 190-01054-01 GDU 37X Installation Manual Rev. D Page 3-21...

  • Page 45: Figure 3-23. Doubler Installation, Arinc 743 Footprint, Skin Thickness 0.051" To 0.063

    Figure 3-23. Doubler Installation, ARINC 743 Footprint, Skin Thickness 0.051" to 0.063" Figure 3-24. Installation of ARINC 743 Footprint Antenna 190-01054-01 GDU 37X Installation Manual Rev. D Page 3-22...

  • Page 46: Non-Structural Mount Installation

    Locking nuts are required to secure the ARINC 743 antenna (locking nuts installed on doubler). Torque the four supplied #10-32 stainless steel screws (Garmin P/N: 211-60212-20, MS51958-67, or equivalent) evenly across all mounting screws. Figure 3-25. Generic Non-structural ARINC 743 Footprint Antenna Installation...

  • Page 47: Figure 3-26. Example Bracket Antenna Mounting Under Glareshield

    Figure 3-26 shows an example of a bracket created to support an antenna mounted on the underside of the glare shield. Figure 3-27 shows the non-structural mounting of the antenna under the glareshield, with the bracket assembly shown in Figure 3-26. Figure 3-26. Example Bracket Antenna Mounting Under Glareshield 190-01054-01 GDU 37X Installation Manual Rev. D Page 3-24...

  • Page 48: Figure 3-27. Example Non-Structural Antenna Mounting Under Glareshield

    Figure 3-27. Example Non-structural Antenna Mounting Under Glareshield 190-01054-01 GDU 37X Installation Manual Rev. D Page 3-25...

  • Page 49: Figure 3-28. Example Teardrop Antenna Installation In Airframe Under Fabric Skin

    Teardrop or the ARINC 743 antenna. Figure 3-28. Example Teardrop Antenna Installation In Airframe Under Fabric Skin Figure 3-29. Example ARINC 743 Footprint In Airframe Under Fabric Skin 190-01054-01 GDU 37X Installation Manual Rev. D Page 3-26...

  • Page 50: Figure 3-30. Example Non-Structural Antenna Mounting On Airframe

    3.6.1) antenna is used, with the antenna support bracket as the mounting surface. Follow the applicable gasketing and sealant instructions in Section 3.4.2 (Teardrop style) or Section 3.5.2 (ARINC 743 style). Figure 3-30. Example Non-structural Antenna Mounting On Airframe 190-01054-01 GDU 37X Installation Manual Rev. D Page 3-27...

  • Page 51: Figure 3-31. Example Teardrop Footprint Antenna Mounting Under Fabric Skin

    Top of antenna at or above the center of the tube structure (Figure 3-31, top) 1.00 1.25 0.625 0.75 Top of antenna between the center and bottom of the tube structure (Figure 3-31, bottom) 1.00 11.5 1.25 14.3 190-01054-01 GDU 37X Installation Manual Rev. D Page 3-28...

  • Page 52: Software, Configuration, Databases, And Xm Activation

    ACTIVATION 4.1 Configuration Mode Some software loading and all configuration settings are performed in the configuration mode. To enter configuration mode, hold down the left-hand softkey (softkey #1) while powering on the GDU 37X. Softkey #1 4.2 Software/Audio Data Identification 4.2.1...

  • Page 53: Software Loading Procedure

    4.3 Software Loading Procedure Software loading is performed in normal mode. See the Garmin website (www.garmin.com) for instructions on downloading and installing software. 4.3.1 GDU Software Loading Procedure 1. Power on the GDU in normal mode, then insert the properly formatted SD card into the SD card slot.

  • Page 54: Configuration

    Main Configuration Page The Main Configuration Page is used to display LRU (device) specific information such as Unit and System IDs and Database information for the various databases used by the GDU 37X. This page has no user-selectable options. 1. In configuration mode, use the FMS Joystick to select and view the MAIN Page.

  • Page 55: Acft Configuration Page

    2. Use the FMS Joystick to select the desired configurable item and make the desired change. Then press the ENT Key or use the FMS Joystick to select the next item. Press the FMS Joystick to move the cursor to the page selection menu when finished. 190-01054-01 GDU 37X Installation Manual Rev. D Page 4-4...
  • Page 56 Main Menu W/B Page in normal mode. Weight/Balance may be used during pre-flight preparations to verify the weight and balance conditions of the aircraft. By entering the weight and arm values into the Aircraft window, the GDU 37X can calculate the total weight, moment, and center of gravity (CG).
  • Page 57 The Units Configuration Page allows selection of the desired displayed units for the listed items in the Units Configuration window. The various settings for Location Format, Map Datum, and Heading can be accessed in the Position Configuration window. See the GDU 37X Pilot’s Guide for a description of Location Format and Map Datum.
  • Page 58 2. Use the FMS Joystick to select the desired configurable item and make the desired change. Then press the ENT Key or use the FMS Joystick to select the next item. Press the FMS Joystick to move the cursor to the page selection menu when finished. 190-01054-01 GDU 37X Installation Manual Rev. D Page 4-7...
  • Page 59 Input Type–Sets the aircraft lighting bus voltage for either 12 or 24V input to match the aircraft lighting bus voltage. Time Constant–Adjusts the speed (in seconds), that the brightness level responds to changes in the input voltage level. 190-01054-01 GDU 37X Installation Manual Rev. D Page 4-8...
  • Page 60 Alert Output – If set to MONO + STEREO, alert tones and messages will be output on both the mono and stereo outputs. If set to MONO ONLY, alert tones and messages will be output only on the mono output. 190-01054-01 GDU 37X Installation Manual Rev. D Page 4-9...

  • Page 61: Comm Configuration Page

    NMEA Out - Supports the output of standard NMEA 0183 version 3.01 data at a baud rate of 4800. Aviation In - The proprietary format used for input to the GDU 37X (baud rate of 9600) from an FAA certified Garmin panel mount unit. Allows the GDU 37X to display a Go To or route selected on the panel mount unit, which eliminates the need to enter the destination on both units.

  • Page 62: Garmin Database Updates

    SD Card, 2 GB recommended (Garmin recommends SanDisk® or Toshiba brand) After the data has been copied to the SD card, perform the following steps: 1. Insert the SD card in the card slot of the GDU 37X to be updated. 2. Turn on the GDU 37X to be updated.
  • Page 63 5. When the update process is complete, the screen displays the database status. 6. Once the database(s) have been updated, the SD card can be removed from the unit 7. The unit must be restarted by pressing the Restart softkey. 190-01054-01 GDU 37X Installation Manual Rev. D Page 4-12...

  • Page 64: Available Databases

    FBOs. Look up taxi services, plan an overnight, and choose fuel stops; plus find ground transportation, lodging, restaurants, local attractions, and more. This database is updated on a quarterly cycle, and has no expiration date. 190-01054-01 GDU 37X Installation Manual Rev. D Page 4-13...

  • Page 65: Siriusxm® Activation Instructions (Gdu 375 Only)

    If the SiriusXM receiver will not receive, an Activation Refresh may resolve the issue. An Activation Refresh may be performed by visiting the link https://care.siriusxm.com/retailrefresh_view.action following the instructions listed there. Visit http://www.siriusxm.com/sxmaviation for SiriusXM weather info. 190-01054-01 GDU 37X Installation Manual Rev. D Page 4-14...

  • Page 66: Gdl 39/Gdl 39R Software Update

    (and is editable) if configured for a Mode S Transponder or not configured for any transponder. The Mode S Address field is not displayed if configured for a non-Mode S Transponder, such as a GTX 327. 190-01054-01 GDU 37X Installation Manual Rev. D Page 4-15...

  • Page 67: Post-Installation Checkout Procedure

    This section contains the post-installation checkout procedures which are recommended to be performed after installing the GDU 37X. It is assumed that the person performing the post-installation checks is familiar with the aircraft, has a working knowledge of typical avionics systems, and has experience using the test equipment defined in this section.
  • Page 68 1. Power on unit and use the FMS Joystick to select the XM Page. Verify that the XM receiver is functioning correctly as indicated by the green signal strength bars. Section 4.6 for XM Activation Instructions if needed. 190-01054-01 GDU 37X Installation Manual Rev. D Page 5-2...

  • Page 69: Appendix A Gdu 37X Pinouts

    APPENDIX A GDU 37X PINOUTS A.1 GDU 37X A.1.1 J3701 Connector PIN 17 PIN 1 PIN 33 PIN 18 Figure A-1 View of J3701 Connector from Back of Unit Table A-1 J3701 Pin Name MONO AUDIO OUT HI STEREO AUDIO OUT LO...
  • Page 70 RESERVED FOR FUTURE DEVELOPMENT, DO NOT USE RS-232 IN 1 RS-232 OUT 1 RESERVED FOR FUTURE DEVELOPMENT, DO NOT USE RESERVED FOR FUTURE DEVELOPMENT, DO NOT USE * Indicates Active Low 190-01054-01 GDU 37X Installation Manual Rev. D Page A-2...

  • Page 71: Table A-2 Aircraft Power

    3 Channels of RS-232 I/O data. Table A-4 RS-232 Pin Name Connector RS-232 IN 1 P3701 RS-232 OUT 1 P3701 RS-232 IN 2 P3701 RS-232 OUT 2 P3701 RS-232 IN 3 P3701 RS-232 OUT 3 P3701 190-01054-01 GDU 37X Installation Manual Rev. D Page A-3...

  • Page 72: Table A-5 Lighting

    A.1.5 Lighting The GDU 37X display and keys can be configured to track 28 VDC or 14 VDC lighting busses using these inputs. Table A-5 Lighting Pin Name Connector 14V LIGHTING BUS HI P3701 28V LIGHTING BUS HI P3701 A.1.6 Audio A.1.6.1 Mono Audio...

  • Page 73: Appendix B Connector Installation Instructions

    Table B-1 and Table B-2 list the parts needed to install a Shield Block. Parts listed in Table B-1 are supplied in the GDU 37X Connector Kits (011-01921-00). Parts listed in Table B-2 are to be provided by the installer.

  • Page 74: Figure B-1 Shield Install Onto A Jackscrew Backshell (78 Pin Example

    Flat washer, Cad-plated Steel, #8, .032" thick, .174"ID, .375" OD NAS1149FN832P Silicon Fusion Tape NOTE In Figure B-1, “AR” denotes quantity “As Required” for the particular installation. Figure B-1 Shield Install onto a Jackscrew Backshell (78 pin example) 190-01054-01 GDU 37X Installation Manual Rev. D Page B-2...

  • Page 75: Figure B-2 Method A.1 For Shield Termination

    For the following steps please refer to the drawings showing the installation of a Jackscrew Backshell. 1. The appropriate number of Jackscrew Backshells will be included in the particular LRU connector kit. Figure B-2 Method A.1 for Shield Termination Table B-3 Shielded Cable Preparations for Garmin Connectors Number of Window Window Ideal...
  • Page 76 The number of individual strands in each braid bundle is not specified. (e.g. QQB575F36T062) NOTE Flat Braid as opposed to insulated wire is specified in order to allow continuing air worthiness by allowing for visual inspection of the conductor. 190-01054-01 GDU 37X Installation Manual Rev. D Page B-4...

  • Page 77: Figure B-3 Insulation/Contact Clearance

    Wire must be visible in the inspection hole after crimping and the insulation must be 1/64 – 1/32 inches from the end of the contact as shown in Figure B-3. Figure B-3 Insulation/Contact Clearance 190-01054-01 GDU 37X Installation Manual Rev. D Page B-5...
  • Page 78 (item 13). Warning: Placing the grooved side of the clamp across the cable bundle may risk damage to wires. 13. Attach the cover (item 14) to the backshell (item 1) using the two screws (item 15). 190-01054-01 GDU 37X Installation Manual Rev. D Page B-6...

  • Page 79: Figure B-4 Method A.2 (Daisy Chain) For Shield Termination

    (Figure B-4). All other restrictions and instructions for the shield termination technique set forth for Method A.1 are still applicable. NOTE The maximum length of the combined braids should be approximately 4 inches. Figure B-4 Method A.2 (Daisy Chain) for Shield Termination 190-01054-01 GDU 37X Installation Manual Rev. D Page B-7...
  • Page 80 The chosen size of solder sleeve must accommodate both the number of conductors present in the cable and the Flat Braid (item 4) to be attached. NOTE Reference Section B.1.2 for recommended solder sleeves and flat braid. The same recommendations are applicable to this technique. 190-01054-01 GDU 37X Installation Manual Rev. D Page B-8...

  • Page 81: Figure B-5 Method B.1 (Quick Term) For Shield Termination

    Table B-4 Shielded Cable Preparations – (Quick Term) Number of Pins Quick Term Min Quick Term Max Quick Term Backshell Size Std/HD (inches) (inches) Float (inches) 9/15 1.25 2.25 1.75 15/26 25/44 37/62 50/78 190-01054-01 GDU 37X Installation Manual Rev. D Page B-9...

  • Page 82: Figure B-6 Method B.2 (Daisy Chain-Quick Term) For Shield Termination

    (Figure B-6). All other restrictions and instructions for the shield termination technique set forth for Method B.1 are still applicable. NOTE The maximum length of the combined braids should be approximately 4 inches. Figure B-6 Method B.2 (Daisy Chain-Quick Term) for Shield Termination 190-01054-01 GDU 37X Installation Manual Rev. D Page B-10...

  • Page 83: Figure B-7 Daisy Chain Between Methods A And B

    Method A and B are still applicable. NOTE The maximum length of the combined braids should be approximately 4 inches. Figure B-7 Daisy Chain between Methods A and B 190-01054-01 GDU 37X Installation Manual Rev. D Page B-11...

  • Page 84: Figure B-8 Method C.1 Double-Shield Termination

    All other restrictions set forth for in Table B-5 are applicable. NOTE The maximum length of the braids should be approximately 4 inches. Figure B-8 Method C.1 Double-Shield Termination Table B-5 Shielded Cable Preparations for Garmin Connectors Number of Window Window...

  • Page 85: Figure B-9 Method C.2 Double-Shield Termination

    B.1.9 ID Program Pins (Strapping) NOTE The GDU 37X rear connector (J3701) is electrically isolated. For installations using programming pins, a ground pin must be tied to the connector shell. ID Program Pins provide a ground reference used by the hardware as a means of configuration for system identification.

  • Page 86: Figure B-10 D-Sub Spliced Signal Wire Illustration

    Splice part numbers: •Raychem D-436-36/37/38 •MIL Spec MIL-S-81824/1 This technique may be used with shield termination methods: A.1, A.2, B.1, B.2, C.1 and C.2. Figure B-10 D-Sub Spliced Signal Wire illustration 190-01054-01 GDU 37X Installation Manual Rev. D Page B-14...

  • Page 87: Appendix C Outline And Installation Drawings

    7.25 184.2 CONN. 1.09 1.92 2.98 27.7 48.7 75.8 6.04 3.41 15.0 153.4 86.7 1.08 27.5 NOTES: DIMENSIONS: INCHES[MM] DIMENSIONS ARE SHOWN FOR REFERENCE ONLY. Figure C-1.1 GDU 37X Outline Drawing 190-01054-01 GDU 37X Installation Manual Revision D Page C-1...

  • Page 88: Appendix C Outline And Installation Drawings

    2. DIMENSIONS SHOWN FOR REFERENCE ONLY. 1.24 31.5 CONNECTOR KIT 011-01921-00 3.58 3.58 45° 45° 91.1 91.1 3.67 3.67 93.1 93.1 GDU 37x UNIT 011-01747-( ) Figure C-1.2 GDU 37X Panel Cutout Drawing 190-01054-01 GDU 37X Installation Manual Revision D Page C-2...

  • Page 89: Figure C-2.1 Ga 55/55A Installation Drawing

    2.350 59.69 2X 3.300 83.82 .625 15.88 4X .220 5.59 MOUNTING CUTOUT 2.59 [65.8] MOUNTING CUTOUT BACKING PLATE NOTES: OUTLINE (ANTENNA OUTLINE) 1. DIMENSIONS: INCHES[mm] Figure C-2.1 GA 55/55A Installation Drawing 190-01054-01 GDU 37X Installation Manual Revision D Page C-3...

  • Page 90: Figure C-2.2 Ga 56 Installation Drawing

    BNC CONNECTOR SIDE VIEW FRONT VIEW 3.00 76.2 2X 1.625 41.28 .813 20.64 .188 4.78 .625 15.88 2.59 [65.8] BACKING PLATE MOUNTING CUTOUT OUTLINE (ANTENNA OUTLINE) Figure C-2.2 GA 56 Installation Drawing 190-01054-01 GDU 37X Installation Manual Revision D Page C-4...

  • Page 91: Figure C-2.3 Ga 57X Installation Drawing

    2.350 59.69 2X 3.300 83.82 .220 5.59 FABRICATE AND INSTALL DOUBLER PLATE AS REQUIRED TO COMPLY WITH APPLICABLE AIRWORTHINESS REGULATIONS MOUNTING CUTOUT NOTES: 1. DIMENSIONS: INCHES[mm] Figure C-2.3 GA 57X Installation Drawing 190-01054-01 GDU 37X Installation Manual Revision D Page C-5...

  • Page 92: Appendix D Interconnect Drawing (Example Only

    *THE LEFT AND RIGHT COMMON PINS (PINS 2 AND 20) MAY BE TIED TOGETHER OR ONLY ONE MAY BE USED. IT IS NOT NECESSARY TO USE BOTH COMMON PINS. Figure D-1.1 GDU 37X Interconnect Drawing 190-01054-01 GDU 37X Installation Manual...

  • Page 93: Appendix D Interconnect Drawing (Example Only

    APPENDIX D INTERCONNECT DRAWING (EXAMPLE ONLY) J3701 J3701 J3701 J3701 Figure D-1.2 GDU 37X Interconnect Drawing 190-01054-01 GDU 37X Installation Manual Revision D Page D-2...

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