Garmin GNS 480 Installation Manaul
Garmin GNS 480 Installation Manaul

Garmin GNS 480 Installation Manaul

Color gps/nav/com
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GNS 480 (CNX80)
Color GPS/NAV/COM

Installation Manual

November 2008
560-0982-01 Rev L

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Summary of Contents for Garmin GNS 480

  • Page 1: Installation Manual

    GNS 480 (CNX80) Color GPS/NAV/COM Installation Manual November 2008 560-0982-01 Rev L...
  • 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 storage medium to be viewed for personal...
  • Page 3: Guide*

    GA 35, GA 36, GA 37 Antenna Installation Instructions 190-00848-00 *These documents, and others relating to the GNS 480 installation, STC certification, and continued airworthiness/maintenance, are included in electronic form in the GNX 480 (CNX 80) GPS/NAV/COM Product CD, part number 140-0056-xxx.
  • Page 4 01 D 3-2 01 E 3-46 01 L D-7 01 F 3-3 01 L 01 L 3-4 01 L 4-1 01 L D-9 2-10 01 E 3-5 01 L 4-2 01 L D-10 560-0982-01 Rev L GNS 480 (CNX80) Installation Manual...
  • Page 5: Table Of Contents

    2.5.7 ............................2-8 IEWING NGLE 2.5.8 ........................2-8 ELICOPTER NSTALLATION 2.5.9 VHF N NAV A ) ............2-9 NSTALLATIONS WITH AVIGATOR NTENNA 2.5.10 CDI..................2-9 NSTALLATIONS WITH XTERNAL ..........................2-10 QUIPMENT OUNTING GNS 480 (CNX80) Installation Manual 560-0982-01 Rev L...
  • Page 6 NTENNA NSTALLATION ENERAL 5.3.3 GNS 480....................5-2 QUIPMENT NTERFACED TO THE 5.3.4 ....................5-2 RESERVATION OF REVIOUS YSTEMS 5.3.5 ......................5-2 IRCRAFT ADIO TATION ICENSE ERIODIC AINTENANCE ..........................6-1 ..........................6-1 QUIPMENT ALIBRATION VOR C ...............................6-1 HECKS 560-0982-01 Rev L GNS 480 (CNX80) Installation Manual...
  • Page 7 3-3. GTX RS-232 S ................. 3-13 ABLE NPUT AND UTPUT ETTINGS 3-4. GTX ARINC 429 I ............3-13 ABLE UTPUT TEMS 3-5. L ....................3-23 ABLE ESCRIPTION OF NPUT ONITOR TEMS 3-6. D ................3-29 GNS 480 (CNX80) Installation Manual 560-0982-01 Rev L...
  • Page 8 IGURE AGES 3-18. TEST M ......................3-19 IGURE 3-19. M CDI F .......................3-20 IGURE UXILIARY 3-20. A CDI F ....................3-20 IGURE 3-21. M CDI T .......................3-21 IGURE UXILIARY 3-22. A VDI T .....................3-22 560-0982-01 Rev L GNS 480 (CNX80) Installation Manual...
  • Page 9 D-16. GNS 480 SN3500 NAV D ..... D-33 IGURE NTERCONNECT IAGRAM D-17. D GNS 480 GDU 620 I ..........D-35 IGURE IFFERENTIAL OF THE NTENNAS G-1. S A-33 A33W A ..........G-1 GNS 480 (CNX80) Installation Manual 560-0982-01 Rev L...
  • Page 10 Table of Contents Notes viii 560-0982-01 Rev L GNS 480 (CNX80) Installation Manual...
  • Page 11: General Information

    The information in this manual is STC approved. Only the equipment interfaces covered in this manual are within the scope of this STC. Other equipment may be suitable for use with the GNS 480, but use of such equipment is beyond the scope of this STC – additional FAA approval may be required if equipment not covered in this manual is used to interface to the GNS 480.
  • Page 12: Equipment Description

    1.2 Equipment Description The GNS 480 Color GPS/NAV/COM is a panel-mounted product that contains a GPS/WAAS engine, VHF COM, and VHF NAV in an integrated unit with a moving map and color display. The GNS 480 will also control a remote transponder.
  • Page 13: System Interfaces

    1.2.2 System Interfaces The interfaces for a typical single GNS 480 avionics stack are shown in Figure 1-2, while the interfaces for a typical dual GNS 480 avionics stack are shown in Figure 1-3. The available interfaces are further described in the following sections.
  • Page 14: Figure 1-3. Sample Dual

    The GNS 480 is capable of driving one external course deviation indicator (CDI) with information based upon VHF NAV or GPS data. The GNS 480 also accepts a resolver input from this CDI. The GNS 480 is capable of driving a second external CDI with information based upon GPS data.
  • Page 15: B Aro C Orrection

    The GNS 480 has one XYZ synchro input that allows synchro heading to be supplied to the GNS 480. 1.2.2.11 Message Audio Output The GNS 480 has one 500 Ω audio output that can be connected to an audio panel to provide audible messages to the pilot. This output can be automatically inhibited by other equipment if required.
  • Page 16: Specifications

    0.7 lbs. (0.3 kg) mounting tube 1.3.3 Environmental The GNS 480 unit is designed and tested to meet appropriate categories as shown in the Environmental Qualification Form included in Appendix A. Operating temperature........-20°C to +55°C Storage temperature ........-55°C to +85°C Temperature variation ........
  • Page 17: Display

    1 pps (pulse per second) ........±275 nsec of UTC second Datum ............WGS-84 SATCOM compatibility ........Compatibility on aircraft equipped with SATCOM is dependent on antenna selection. Antenna Power Supply @ GPS Port....Vout = 4.6V + 0.3 VDC, min 4.3V @ 60 mA GNS 480 (CNX80) Installation Manual 560-0982-01 Rev L...
  • Page 18: Com Receiverp

    Carrier noise level ......... > 35 dB down Sidetone output ..........up to 280 mW into 100Ω, 120 mW into 500Ω Duty cycle: ............ 100% Stuck mic time-out ........35 second time-out, reverts to receive 560-0982-01 Rev L GNS 480 (CNX80) Installation Manual...
  • Page 19: Nav Receiverp

    Receiver sensitivity........-115 dBm typical Centering error..........RTCA DO-195 two sigma limit: 6.6% of full scale GNS 480 performance: less than 1.0% typical (1.5 mV) Audio output ..........With a 1 kHz tone 30% modulation at least 100 mW output into 500 Ω loads Ident/voice .............With 100 mV input, 30% modulation at 1020 Hz, the...
  • Page 20: Avionics Interfaces

    Cross modulation products......At least 60 dB down Receiver sensitivity ........-95 dBm typical Centering error ..........RTCA DO-195 two sigma limit: 6.7% of full scale GNS 480 performance: less than 2.0% typical (3.0 mV) 1.3.8.4 Computation Rates The tuned active frequency is computed 10 times per second. If the VOR monitor function is activated, 20% of each second is allocated to the monitored frequency, slightly decreasing the active to frequency computation rate.
  • Page 21 Output loading ..........1,000 ohms (max) ILS energize signal ........Sinks up to 400 mA (max) 1.3.9.4 Annunciator Outputs Annunciators..........Open collector outputs capable of sinking up to 400 mA for turning ON annunciator lamps GNS 480 (CNX80) Installation Manual 560-0982-01 Rev L 1-11...
  • Page 22: W Ithout O Perational L Imitations

    GNS 480 (CNX80) AFMS Limitations section. 1.3.10.1.1 Antennas Without Operational Limitations The list of TSO-C144 antennas shown in Table 1-1 allow the GNS 480 (CNX80) models to meet TSO- C146a requirements without the operational limitations specified in the Limitations Section 5.2 of this manual.
  • Page 23: Serial Interface

    General Information 1.3.10.1.2 Antennas With Operational Limitations The list of TSO-C144 antennas shown in Table 1-2 allow the GNS 480 (CNX80) models to meet TSO- C146a requirements with the operational limitations specified in the Limitations Section 5.2 of this manual.
  • Page 24: Regulatory Compliance

    Unauthorized changes or modifications to the GNS 480 may void the compliance to required regulations and authorization for continued equipment usage. All GNS 480 (CNX80) functions are design approved by TSO, and have airworthiness approval as part of the initial STC. If additional information (drawing lists and software documentation) is required for aircraft installation certification, contact Garmin AT Customer Support for assistance.
  • Page 25: Tso/Etso/Jtso A

    ETSO-2C128, Stuck Mic EUROCAE/ED-67 ETSO-2C34f, Glideslope EUROCAE/ED-47B VOR/ILS ETSO-2C36f, Localizer EUROCAE/ED-46B Level C ETSO-2C40c, VHF Omni Range EUROCAE/ED-22B GPS/WAAS ETSO-C146, GPS/WAAS RTCA/DO-229C, Class Level B ETSO-C113, Display SAE AS 8034 Level B GNS 480 (CNX80) Installation Manual 560-0982-01 Rev L 1-15...
  • Page 26: Tso Deviations

    “MAP” instead of “NAV”. RTCA/DO- 229C GNS 480 (CNX80) software version 2.0 added a “NAV” button to the user interface, thus removing the deviation from TSO-C146a for units with software version 2.0 or later. TSO-C146a 2.
  • Page 27: Database Updates

    The database on the GNS 480 database card is generated from current Jeppesen-Sanderson data and converted to a format that is used by the GNS 480. The data conversion process is performed using software that is developed and maintained under Garmin AT configuration management according to RTCA/DO-200A, Standards for Processing Aeronautical Data.
  • Page 28: Package Contents

    General Information 1.7 Package Contents As shipped from the Garmin factory, the GNS 480 package includes most necessary items for installation other than supplies normally available at the installation shop, such as wire and cable ties, circuit breakers, and required input and output equipment. The items included in the package are listed in Table 1-6, Table 1-7, and Table 1-8.
  • Page 29: Optional Accessories

    Installation information for the antennas can be found in the appropriate installation manual listed in Section 1.9. 1.8.1.1 GA 35 Antenna: GA 35 Antenna Garmin P/N 013-00235-00 contains the following items: Item Part Number 013-00235-00 (Garmin)
  • Page 30: Gps Antenna Doubler

    [1] Antenna includes 6-32 UNC-2A x 1.00” SS 303 mounting screws (qty 4) and o-ring (qty 1). [2] Installation of this antenna is not covered by the Garmin GA Antenna AML STC SA01695SE. An antenna doubler may also be required. Refer to Section 1.8.2 below for additional information.
  • Page 31: Optional Reference M

    Standard Terminal Arrival Route Supplementary Type Certificate Temporary Flight Restriction Technical Standard Order Vertical Deviation Indicator VNAV Vertical Navigation Very High Frequency Omni-Directional Range WAAS Wide Area Augmentation System XPDR Transponder GNS 480 (CNX80) Installation Manual 560-0982-01 Rev L 1-21...
  • Page 32 General Information Notes 1-22 560-0982-01 Rev L GNS 480 (CNX80) Installation Manual...
  • Page 33: Installation

    Tie wraps or lacing cord • Ring terminals (for grounding) 2.3.2 Optional Accessories Not Supplied For a list of optional accessories that are available but not supplied with the GNS 480, refer to Appendix F. GNS 480 (CNX80) Installation Manual 560-0982-01 Rev L...
  • Page 34: Special Tools Required

    GPS antenna is required for GPS navigation functions. • To take full advantage of the GNS 480 capabilities an optional altitude source is recommended for automatic sequencing of course-to-altitude (CA) and heading-to-altitude (VA) leg types. If no altitude data is provided to the GNS 480, CA and VA legs must be manually sequenced.
  • Page 35: E Valuation

    2.5.1.3 IFR GPS Installation In order for the GNS 480 to be utilized for IFR GPS Navigation, the criteria in 2.5.1.2 must be met and the GNS 480 must be mounted within the acceptable field-of-view. Refer to 2.5.3.1 for determining whether or not the GNS 480 is located within the acceptable field-of-view.
  • Page 36: Existing Sensors

    ARINC 429 air data computer (ADC), an SL70/SL70R transponder, a GTX 33/330 transponder, and another GNS 480. If multiple sources of altitude data are supplied to the GNS 480, only valid data from the highest priority source is used (input priority cannot be configured). If the highest priority source becomes unavailable, data is taken from the next-highest priority source.
  • Page 37: Mounting Considerations

    / operating the GNS 480. The location should be such that the GNS 480 is not blocked by the glare shield on top, or by the throttles, control yoke, etc. on the bottom.
  • Page 38: Figure 2-1. Acceptable Field

    2. If the GNS 480 is mounted to the right of the instruments, and the left edge of the GNS 480 is within 13.8 inches to the right of the centerline, and the bottom edge of the GNS 480 is in the acceptable area, the GNS 480 is considered within the acceptable field-of-view.
  • Page 39: Figure 2-2. Acceptable

    The preferred location for this annunciator is on the same side of the switched CDI/HSI as the GNS 480. A CDI/HSI with a built-in NAV/GPS annunciation may also be used in lieu of a separate external annunciator to satisfy the annunciation requirement.
  • Page 40: Cabling And Wiring

    2.5.7 Viewing Angle The GNS 480 shall be located such that the operator will have easy access to the controls and have adequate view of the display. The GNS 480 may be adequately viewed from the primary pilot’s position when the following minimums are met: 60 degrees off pilot’s eye center line...
  • Page 41 Installations using the GNS 480 as a GPS navigator only must connect the external CDI to the AUX CDI outputs, and configure the CDI key on the GNS 480 to be disabled. The CDI key is used to toggle the MAIN CDI outputs between GPS and VHF Navigation guidance on the external CDI.
  • Page 42: Mounting Tube Installation

    The front of the mounting tube should be flush to the instrument panel and allow sufficient clearance for the back of the bezel of the GNS 480 to mount flush to the mounting tube. Sufficient clearance must exist in the instrument panel opening to allow ease of insertion and removal of the GNS 480.
  • Page 43 (when viewed from the long side of the connector). Straighten the flanges if they are observed to be bowed. Refer to Section 2.7 Electrical Connections for details about how to wire the connectors. GNS 480 (CNX80) Installation Manual 560-0982-01 Rev L 2-11...
  • Page 44: Gns 480 D

    Installation Procedures Figure 2-3. GNS 480 Dimensions 2-12 560-0982-01 Rev L GNS 480 (CNX80) Installation Manual...
  • Page 45: Unit Insertion

    The back of the bezel must be flush to the mounting tube (within 0.020"). If the cam lock is hard to turn or the unit does not seat fully, the unit is probably binding and the mounting tube should be checked. GNS 480 (CNX80) Installation Manual 560-0982-01 Rev L 2-13...
  • Page 46: Unit Removal

    2.6.4 Unit Replacement Whenever the GNS 480 is removed and reinstalled, verify that the GNS 480 unit power-up self-test sequence is successfully completed and no failure messages are annunciated. If the unit was serviced or if a different unit is being installed, accomplish the setup and configuration procedures defined in 3.2 prior to verifying that the GNS 480 unit power-up self-test sequence is successfully completed and no failure messages are annunciated.
  • Page 47: Figure 2-6. Mounting Frame

    Installation Procedures Figure 2-6. Mounting Frame Assembly GNS 480 (CNX80) Installation Manual 560-0982-01 Rev L 2-15...
  • Page 48: Electrical Connections

    Installation Procedures 2.7 Electrical Connections The GNS 480 installation kit includes four D-sub connectors and three coax connectors. The connector layouts are shown in Figure 2-7. The D-sub connectors use the supplied crimp contacts as specified in Table 2-3. Make the crimp connections with the crimp tool specified Section 2.4.
  • Page 49: Interface Connector Definition

    NOTE The rear connector plate is shown with right-angle RF connectors. Straight RF connectors with female BNC connections (Garmin AT P/N 162-0098) are available as an option, allowing a regular male BNC connector to be used on the antenna cables.
  • Page 50: Figure 2-8. 37-Pin Connector

    Main Power Output for NAV Receiver 2.8.1 RESERVED RESERVED Power Gnd Out (NAV) Main Power Ground Output for NAV Receiver 2.8.1 VIEW LOOKING AT REAR OF UNIT Figure 2-8. 37-pin Connector 2-18 560-0982-01 Rev L GNS 480 (CNX80) Installation Manual...
  • Page 51: Onnector P In -O Ut (P4)

    2.7.1.2 COM I/O Connector (P4) The GNS 480 communication interface is handled via a standard density male 15-pin D-sub connector located at the top of the unit. Internally this connection is on the VHF COM board. The pinout for the connector is defined in the following table.
  • Page 52: Xpansion C Onnector P In -O Ut (P5)

    I/O Expansion Connector (P5) Additional I/O for the GNS 480 is achieved via the I/O expansion connector, which consists of a high density female 78-pin D-sub connector near the bottom of the unit. The pinout for the connector is defined in the following table.
  • Page 53 Discrete In/Out 4 (Not implemented at time of publication) Suspend In Suspend, places auto sequencing on hold (active low) 2.8.9.6 Audio Inhibit In Inhibit Audio Messages (active low) 2.8.9.7 RESERVED RESERVED GNS 480 (CNX80) Installation Manual 560-0982-01 Rev L 2-21...
  • Page 54: Detail

    Installation Procedures Function Connection RSVD CDI / VDI Ground Connection Discrete Discrete Outputs Reserved RSVD Inputs RSVD Audio RSVD Serial SYNCRO VIEW LOOKING AT REAR OF UNIT Figure 2-10. 78-Pin Connector Detail 2-22 560-0982-01 Rev L GNS 480 (CNX80) Installation Manual...
  • Page 55: Onnector P In -O Ut (P7)

    50ma when unit is on 2.8.8.4 Composite Ground return path for the composite signal 2.8.4 (see Figure 2-8 for a diagram of a 37-pin connector) GNS 480 (CNX80) Installation Manual 560-0982-01 Rev L 2-23...
  • Page 56: Functional Descriptions

    TO/FROM indications. The CDI key on the bezel of the GNS 480 is used to toggle between the display of GPS and VOR/ILS information on the CDI window and remote CDI. The navigation source is displayed in the CDI window.
  • Page 57 Each flag output provides (V – 2) volts relative to ground when valid information is present, where V represents the aircraft power supplied to the GNS 480. Each output is capable of supplying up to 400 mA. 2.8.2.5 OBS Resolver The OBS resolver input should be compatible with a standard 6-wire OBS interface - any electrical zero crossing will work because the GNS 480 will calibrate out any errors.
  • Page 58: Auxiliary Course Deviation Indicator

    2.8.4 Composite Indicator The GNS 480 provides a standard VOR/localizer composite output signal that may be used to drive the left/right deviation, TO/FROM and valid flag indications of certain navigation indicators that contain an internal converter. If an external converter is driven from the composite output, the composite output will be disabled whenever the VOR monitor mode is active or back course localizer mode is enabled.
  • Page 59: Altimeter

    2.8.5 Altimeter The GNS 480 accepts altitude data serially, using either RS-232 or ARINC 429 inputs. Refer to section 2.8.10 for additional information on the serial interfaces. In addition, the GNS 480 can accept the baro- correction using the potentiometer output from a suitable altimeter. If baro-correction and uncorrected pressure altitude are provided to the GNS 480, baro-corrected altitude will be output by the GNS 480.
  • Page 60: Annunciator Outputs

    GNS 480 front panel. Refer to 2.5.3 to determine whether or not external annunciators are required. All of the annunciator outputs duplicate annunciations available on the front of the GNS 480. These can be used to drive annunciator lamps to make the annunciation available remotely (such as in the pilot’s primary field of view).
  • Page 61 The Suspend Annunciate output is grounded when automatic sequencing of waypoints in the active flight plan has been suspended (either manually by the user or automatically by the GNS 480). If an external annunciator is used for suspend annunciation, it is recommended that the suspend annunciator be labeled “SUSP”...
  • Page 62 WAAS altitude more than (50 meters plus the vertical protection limit (VPL)) below the altitude at the FAF If an external annunciator is used for altitude alert annunciation, it is recommended that the altitude alert annunciator be labeled “ALT” in amber text. 2-30 560-0982-01 Rev L GNS 480 (CNX80) Installation Manual...
  • Page 63: Discrete Outputs

    GNS 480 front panel. All of the switch inputs duplicate functions available on the front of the GNS 480. These can be used to make the function available remotely.
  • Page 64 Installation Procedures NOTE If the GNS 480 is setup to IGNORE the CDI select key and discrete input (refer to 3.2.1.6) this input will not be functional. 2.8.9.2 COM Flip-Flop Switch P1-14 COM Flip Flop In The COM Flip Flop In is used to toggle the active and standby COM frequencies. A momentary ground on this input performs the same function as pressing the COM flip-flop soft key (↔) on the bezel.
  • Page 65 Audio Inhibit In The Audio Inhibit In is used to inhibit the GNS 480 audio messages. A ground on this input causes GNS 480 audio messages not to be played; if this input is open GNS 480 audio messages will be played. Any audio messages that are inhibited because of this input will not be played when the audio inhibit condition is removed.
  • Page 66: Serial Interfaces

    SL30 for display on its front panel. The GNS 480 can communicate with a PDA using the infrared sensor on the front bezel. If this feature is used it must be set up on RxD3 and TxD3, not allowing these lines to be used for communication with other devices.
  • Page 67: Nput L Abels

    The GNS 480 can receive air data, heading data, wind data, traffic data and selected course from suitable equipment. The labels that are used by the GNS 480 depend upon the port configuration. Below is a list of available input configurations and the labels accepted by each one: 1.
  • Page 68 8. GAMA 429 GFX (software version 2.3 and later) 9. GAMA 429 GFX Int (software version 2.3 and later) NOTE The GAMA 429 No FP configuration does not contain flight plan information. 2-36 560-0982-01 Rev L GNS 480 (CNX80) Installation Manual...
  • Page 69: Utput L Abels

    Drift Angle ● ● ● ● ● ● ● 326G Lateral Scale Factor ● ● ● ● ● ● ● 327G Vertical Scale Factor [Note 5] ● ● ● ● ● GNS 480 (CNX80) Installation Manual 560-0982-01 Rev L 2-37...
  • Page 70 [3] Binary DDM for glideslope deviation is limited to ±0.175. [4] The GNS 480 Equipment Hex ID is 002 for configurations 1, 2, and 5. For configuration 4, the Hex ID is 010 when a localizer is tuned, and 011 when a VOR is tuned.
  • Page 71: Time Mark Output

    2.8.12 VHF COM The GNS 480 provides an internal COM transceiver that can be interfaced to an audio panel or connected directly to a speaker. The PTT input is used to enable the COM MIC audio and cause the COM transceiver to transmit on the active frequency.
  • Page 72: Vhf Nav

    2.8.9.5 for additional details. 2.8.13 VHF NAV The GNS 480 provides an internal NAV receiver that can be interfaced to an audio panel. An optional external input is also available to allow the user to toggle the active and standby NAV frequencies.
  • Page 73: Dme Tuning

    OBI Data P5-37 OBI Sync The GNS 480 provides bearing from a waypoint for Bendix / King Serial OBI devices. The source used to provide the bearing information is selected by the OBI Select input. 2.8.15.2 RMI / OBI Source Select...
  • Page 74: Antenna Installation And Connections

    The GNS 480 requires three antennas: COM antenna, GPS antenna, and NAV antenna. Structural substantiation for mounting of antennas is byond the scope of the GNS 480 unit STC. For mounting the GPS/WAAS antenna, refer to Garmin GA Antenna AML STC SA01695SE or other FAA approved data (Section 1.8.1).
  • Page 75: Gps Antennai

    35 feet. For longer lengths, use low-loss 50Ω coax. Suggestion: Temporarily locate the GPS antenna with coax connected to the GNS 480 and check the GPS performance as described in the GPS Operation and Position test in the Post Installation Checkout in section 3.3.2.1.2.
  • Page 76: Ntenna I Nstallation C Onsiderations

    Installation Procedures Figure 2-11. GPS Antenna Installation Considerations 2-44 560-0982-01 Rev L GNS 480 (CNX80) Installation Manual...
  • Page 77: Nav Antenna

    Most VOR/LOC-only antennas will still provide an adequate glideslope signal for the GNS 480 to operate normally. If two nav receivers (e.g. one GNS 480 and one SL30) are installed in the aircraft, a splitter must be used. Installations should use an appropriate splitter, such as the Mini-Circuits ZFSC-2-1B BNC, available as an option under the Garmin AT part number 115-0007.
  • Page 78: Electrical Load Analysis

    Include your name and certificate number in the aircraft records. Table 2-12 identifies the weight of the new GNS 480 equipment and Figure 2-13 shows the center of gravity.
  • Page 79: Gns 480 Center Of

    Installation Procedures 3.000 5.630 12.145 11.000 12.676 10.300 6.250 3.060 1.760 1.700 3.250 Figure 2-13. GNS 480 Center of Gravity GNS 480 (CNX80) Installation Manual 560-0982-01 Rev L 2-47...
  • Page 80 Installation Procedures Notes 2-48 560-0982-01 Rev L GNS 480 (CNX80) Installation Manual...
  • Page 81: Post Installation Configuration & Checkout Procedures

    3 Post Installation Configuration & Checkout Procedures Once the GNS 480 unit has been installed, configure the unit for the particular installation and then complete the checkout procedures herein to verify proper operation. The steps that are not applicable to a particular installation may be skipped.
  • Page 82: Equipment Setup And Configuration

    1, 4, and MENU/ENTER in sequence immediately after the GNS 480 initialization is complete and before any other bezel keys on the GNS 480 are pressed. Line select key 1 is the top line select key, line select key 4 is the fourth key down, and MENU/ENTER is the lower most key below the line select keys.
  • Page 83: Setup Function

    3.2.1 Setup Function The SETUP function allows the custom configuration of the GNS 480 for each individual installation. The SETUP function allows the installer to configure the serial and ARINC 429 ports, calibrate the resolver head (if installed), calibrate the baro potentiometer (if installed), and set COM parameters.
  • Page 84 Garmin AT serial output. [2] Although the IrDA option is shown for port 3, this interface is currently not supported. [3] The CROSSFILL configuration is used to allow GNS 480’s to share information in a dual GNS 480 installation.
  • Page 85: Arinc 429 Ports

    ALL in the SDI column (the value of ALL cannot be changed). The SDI field on the ARINC 429 outputs can be configured as SYS 1, SYS 2, or ALL. For dual GNS 480 installations, each GNS 480 must have a unique source name (SYS 1 or SYS 2). For a single GNS 480 installation, select ALL.
  • Page 86: Figure 3-4. Resolveri

    3. Follow the instructions on the display for calibrating the resolver. If the GNS 480 will not accept the calibration or advances to the next prompt when the MENU/ENTER key is pressed, there may be a problem with the resolver interface.
  • Page 87: Figure 3-5. Resolverc

    Figure 3-5. Resolver Calibration Page The GNS 480 cannot drive multiple resolvers at the same time. It is not recommended that external resolvers be switched through a relay or other means because the resolver must be calibrated to the radio as described in this procedure.
  • Page 88: Figure 3-6. Altimeteri

    CAL line select key is pressed when the baro pot is set to NOT INSTALLED, it will automatically be changed to INSTALLED. 2. Follow the instructions on the display for calibrating the baro potentiometer. If the GNS 480 will not accept the calibration when the MENU/ENTER key is pressed, there may be a problem with the baro potentiometer interface.
  • Page 89: Com Radio Setup

    Press the CDI SEL line select key to toggle between USE (for installations that will utilize the GNS 480 CDI bezel key to switch between NAV and GPS) or IGNORE (for installations where it is desired that the CDI bezel key be inoperative).
  • Page 90: Figure 3-9. Miscellaneous

    GNS 480 will prepend a ‘p’ to parallel track Waypoint Identifiers. MapMX and MAPCOM RS-232 outputs will prepend the ‘p’ and truncate Identifier at five characters. If SUFFIX is selected the GNS 480 will append a ‘p’ to parallel track Waypoint Identifiers. MapMX RS-232 output will not append the ‘p’ to waypoint identifier, MAPCOM RS-232 output will append the ‘p’...
  • Page 91: Figure 3-11. Gps Vertical

    GNS 480. NOTE If the GNS 480 is not communicating with the GTX transponder, all of the editable fields for the setup items shown in the following sections will be dashed out.
  • Page 92 While on the GTX Main Setup menu page, press the RS-232 line select key to configure the GTX transponder serial port settings. The GTX serial port setup page is shown in Figure 3-13. Figure 3-13. GTX RS-232 Serial Setup Page 3-12 560-0982-01 Rev L GNS 480 (CNX80) Installation Manual...
  • Page 93 OFF / GPS / ADC NO ALT / ADC W/ALT / EF/AD NO ALT / EF/AD W/ALT High / Low CH_IN_4 OFF / ADLP High / Low CH_OUT_1 OFF / GARMIN / GARMIN W/TIS / ADLP High / Low CH_OUT_2 OFF / GARMIN / GARMIN W/TIS High / Low GNS 480 (CNX80) Installation Manual...
  • Page 94 MENU/ENTER key to save the settings. Press the BACK smart key to return to the GTX Main Setup menu. The configuration options for the aircraft configuration items are listed below: 3-14 560-0982-01 Rev L GNS 480 (CNX80) Installation Manual...
  • Page 95 If address is a US registration number, FLT ID can be the same. SAME AS TAIL Enter FLT ID every time the unit is turned on in normal mode. POWER UP ENTRY Enter FLT ID in configuration mode only. CONFIG ENTRY GNS 480 (CNX80) Installation Manual 560-0982-01 Rev L 3-15...
  • Page 96 Select desired VOICE (male or female) that will be used for aural message annunciations. TRAFFIC ALERT Sets the Traffic Alert to either Tone or Message. Traffic Information Service (TIS) provides notification of close proximity traffic using the selected alert method. 3-16 560-0982-01 Rev L GNS 480 (CNX80) Installation Manual...
  • Page 97 Advisory" in TCAS terms). 4 = "Timer Expired,” when the countdown timer expires (this aural message not used in installations with the GNS 480). 5 = "Traffic Not Available,” when TIS service is not available or out of range of an operating TIS Mode S site.
  • Page 98 If Gillham altitude is not being provided to the transponder, INVALID will be displayed. NOTE The GTX 32/327 transponder does not currently support this function, so INVALID will always be displayed, even if the transponder is receiving valid Gillham altitude. 3-18 560-0982-01 Rev L GNS 480 (CNX80) Installation Manual...
  • Page 99: Equipment Operational/Functional Test

    Test Function The Test function allows the checkout of the display, controls, and I/O of the GNS 480. While in the Ground Maintenance mode, press the TEST smart key to enter the Test menu, which is shown in the top part of Figure 3-18.
  • Page 100 Page. Press the SELECT line select key to toggle between MAIN and AUX CDI deviation tests. The MAIN CDI test screen is shown in Figure 3-21, and the AUX CDI test screen is identical. 3-20 560-0982-01 Rev L GNS 480 (CNX80) Installation Manual...
  • Page 101 10 corresponding to a full scale output of 150 mV, and 0 corresponding to center). As a minimum, perform the LEFT, MID and RIGHT tests for the lateral deviation needle of each CDI connected to the GNS 480. Press the TEST or BACK smart key to return to the Ground Maintenance Test menu.
  • Page 102 150mV, and 0 corresponding to the center) As a minimum, perform the DOWN, MID and UP tests for the vertical deviation needle of each CDI connected to the GNS 480. NOTE For some HSI’s the glideslope indicator may not be visible unless it is receiving a valid signal from the localizer (ILS Energize is present).
  • Page 103 For each annunciator that is used, verify proper operation by turning the annunciator ON and OFF. Press the TEST or BACK smart key to return to the Ground Maintenance Test menu. GNS 480 (CNX80) Installation Manual 560-0982-01 Rev L 3-23...
  • Page 104 3.3.1.1.5 Display Test The Display Test function displays various test patterns and can be used to verify the GNS 480 display operation. While on the Ground Maintenance main TEST menu page, press the NEXT PAGE line select key, followed by the DISPLAY line select key to go to the Display Test page. Turn the outer knob while on any Test Pattern page to display the next Test Pattern Page in the sequence.
  • Page 105 Figure 3-25. Bezel Key Test The bezel key test should be run upon initial installation or any time a problem is suspected with one of the GNS 480 bezel keys or knobs. GNS 480 (CNX80) Installation Manual 560-0982-01 Rev L...
  • Page 106 Vary the roll/steer value left and right and verify that the autopilot behaves accordingly. Press the TEST or BACK smart key to return to the Ground Maintenance Test menu. 3-26 560-0982-01 Rev L GNS 480 (CNX80) Installation Manual...
  • Page 107 3.3.1.2 Input Monitor Function The Input Monitor Function monitors the external inputs to the GNS 480 and displays the data currently being received. Press the INPUT smart key in the Ground Maintenance mode to reach the Interface Monitor Function, as shown in Figure 3-27. The display will show the status of the connected interfaces.
  • Page 108 Details for each of the inputs that can be monitored are shown in Table 3-6. For each GNS 480 ARINC 429 input that is used, verify that data is being received. If no data is being received, ensure that (i) the source equipment is turned on, (ii) the ARINC 429 input type and speed has been set up correctly, and (iii) the wiring is correct.
  • Page 109 ‘1’ if input is grounded Normally a ‘-‘ is displayed. When CDI SEL: Main CDI Select In P7-8 the input is actuated a ‘T’ will be displayed for approximately 1 sec. GNS 480 (CNX80) Installation Manual 560-0982-01 Rev L 3-29...
  • Page 110: System Checkout - Ground Checks

    System Checkout – Ground Checks The GNS 480 includes a self test that is executed every time the unit is turned on that checks the unit operation as well as other internal functions. Verify that the unit does not display a failure indication when turned on.
  • Page 111 Initial Power-Up The first time the GNS 480 is used after it is installed, the GPS seed position, UTC time and date must be entered. Following the display of the main start-up screen, the screen shown in Figure 3-30 will be displayed for 10 seconds.
  • Page 112 GPS Operation and Position Check the GPS operation as follows: 1. Turn on the GNS 480 and allow the unit to acquire a position. All other avionics should be turned off for this part of the test. 2. Check the position using the GPS Status page, which is shown in Figure 3-31. This page is accessed by pressing the FN key twice, causing the SYS smart key to be displayed.
  • Page 113 GNS 480. Special care should also be taken to ensure that there is no interference with the GNS 480 if non-aviation radios are installed in an aircraft after a GNS 480 has been installed.
  • Page 114 Press the CDI bezel key to select VOR CDI mode (indicated by a green VOR in the left portion of the GNS 480 CDI display). To the right of the VOR indication is the current setting of the OBS. Verify that the OBS decodes properly from 0 to 360 degrees (the value displayed on the GNS 480 should be within ±2°...
  • Page 115 GNS 480 to the audio panel is functional. Prior to proceeding with this check, ensure that the audio panel is set to annunciate the GNS 480 message audio. If the following steps do not perform correctly, check the electrical connections and AMA volume setting.
  • Page 116 1. Check the System Info page on the MX20 to verify that the data is available to each port and that it is being processed properly. 2. Load a flight plan into the GNS 480 and verify that the flight plan is displayed on the MX20 on the FPL page.
  • Page 117 (Baro Correct.). 3. Change the baro correction on GNS 480 #1 and verify that it changes to the same value on GNS 480 #2. Repeat by changing the baro correction on GNS 480 #2 and verifying that it changes to the same value on GNS 480 #1.
  • Page 118 TIS Traffic Enabled (GTX33+TIS Configured): 1. On the GNS 480 go to the traffic page. This page is accessed by pressing the FN key repeatedly until the TFC smart key is displayed. The TFC smart key is then pressed to display the traffic page.
  • Page 119 This check verifies that the units are communicating. Ensure that the GNS 480 and SL30 are turned on and in normal mode, and that the GNS 480 has a valid position. If the following steps do not perform correctly, check the electrical connections and configuration setup.
  • Page 120 1. Apply power to the equipment and wait for the GNS 480 to acquire a position. 2. In the GNS 480, set a course to a destination waypoint. This can be done by pressing the NRST bezel key to display a list of nearby waypoints. Then use the large, outer knob to select a suitable waypoint and press the DIRECT-TO bezel key, followed by the Direct line select key.
  • Page 121 The GNS 480 can receive carbon monoxide level from an external sensor. This check verifies that the GNS 480 is receiving data from these units. Ensure that the GNS 480 and carbon monoxide sensor are turned on and in normal mode. If the following steps do not perform correctly, check the electrical connections and configuration setup.
  • Page 122: System Checkout - Flight Checks

    If GPS position is lost, a “WARNING Loss of Navigation” message will be displayed. 2. Enter and activate a flight plan on the GNS 480. Fly the flight plan and verify that the display of flight plan data is consistent with the CDI indication (deviation, TO/FROM…) in the pilot’s primary field of view.
  • Page 123: Database Check

    Check the database to ensure it is current. The database information is displayed at startup. To check the database: 1. Turn off the GNS 480 and then turn it on. The GNS 480 will go through its normal start-up sequence.
  • Page 124 Post-Installation Configuration & Checkout This Page Intentionally Left Blank 3-44 560-0982-01 Rev L GNS 480 (CNX80) Installation Manual...
  • Page 125: Gns 480 Post -I

    Post-Installation Configuration & Checkout Table 3-7. GNS 480 Post-Installation Checkout Log GNS 480 Post-Installation Checkout Log Date: ___/___/___ By: _____________ ONFIGURATION NFORMATION 430-6100-8_____-______ Mod ____ GNS 480 C Serial # ___________ GPS Antenna Part # Model # Antenna Serial #...
  • Page 126: Ystem

    VOR reception checked Sidetone level set / checked Localizer reception checked Deviation needle and flag checked NTERFACE HECKOUT N/A] GNS 480 Message Audio N/A] SL30 NAV/COM N/A] Altimeter Baro Correction N/A] Compass System Heading N/A] Altitude Encoder or ADC N/A] Autopilot...
  • Page 127: Troubleshooting

    This section provides information to assist troubleshooting if problems occur after completing the installation. Use Table 4-1 to assist in troubleshooting. Devices connected to the GNS 480, such as an SL30, SL70 or MX20/GMX 200 can be useful for determining whether the GNS 480 is functioning properly or if there are problems with the installation.
  • Page 128 • MX20 software prior to v5.x. • Update MX20 software. • Wiring connections are incorrect. • Check wiring • The GNS 480 is not configured • DST data (Distance, Go to serial port setup page and verify Speed, Time) is not correctly.
  • Page 129 • GNS 480 baro pot input not • Calibrate baro pot altimeter calibrated • GNS 480 is not the only device tied • Ensure GNS 480 is the only device to the altimeter baro pot connected to the altimeter baro pot •...
  • Page 130: Contacting The Factory For Assistance

    Rx port (not applicable to dual GNS 480’s controlling the SL70). GNS 480s controlling the SL70). 4.2 Contacting the Factory for Assistance If the GNS 480 unit fails to operate despite troubleshooting efforts, contact Garmin Technical Support for assistance. GARMIN International, Inc. 1200 East 151...
  • Page 131: Limitations

    5 Limitations 5.1 Operation There are no Part 23 aircraft type limitations. All functions of the GNS 480 meets the appropriate design assurance qualifications for primary or secondary for airplane Class I, Class II, Class III, and Class IV in accordance with AC 23.1309-1C Figure 2.
  • Page 132: Installation

    5.3.2 Antenna Installation – General GNS 480 interfaces to GPS antennas other than those identified in this installation manual are outside the scope of this manual and may require further evaluation for certification and/or other FAA airworthiness approval.
  • Page 133: Periodic Maintenance

    IFR flight. Refer to CFR 14 paragraph 91.171. Every 30 days verify the limits of the permissible indicated bearing error. The last VOR check information may be entered into the GNS 480 via the NAV VOR Mode then on the Test Log Menu page.
  • Page 134 Periodic Maintenance Notes 560-0982-01 Rev L GNS 480 (CNX80) Installation Manual...
  • Page 135 UALIFICATION A.1 E The GNS 480 has been tested to the following environmental categories per procedures defined in RTCA/DO-160D. Tests were conducted from September 2002 to April 2003 using the original 1997 revision of DO-160D and specification defined in PD3107.
  • Page 136 Appendix A - Certification Data A.2 GNS 480 STC D Refer to Garmin AT document 560-0988-00 (see “STC data” on the product CD) for data regarding GNS 480 STC authorization. This document contains information on the following items: • Supplementary Type Certificate (STC) •...
  • Page 137: S Pecifications

    APPENDIX B - SERIAL INTERFACE SPECIFICATIONS This appendix includes the RS-232 serial port interface specifications. The RS-232 serial interface configurations supported by the GNS 480 are described below. Instructions for configuring the serial port are included in the checkout procedure in section 3.2.1.1. Serial output connections should be limited to a maximum of three external units.
  • Page 138: Data.

    Appendix B - Serial Interface Specifications B.1.1 Altitude Encoder/Converter Input The GNS 480 will accept various serial altitude formats. The only configuration required for the altitude encoder input is the baud rate – the serial altitude format will be recognized automatically. The input signals shall be compatible with RS-232C and have the following characteristics: Baud rate: ..........1200/9600 (defined by encoder used)
  • Page 139 <+/-> sign indicator sensor temperature checksum of bytes 1 through 14 in hex ASCII (e.g., "FA") <CR> carriage return (0x0d) Note: Checksum is calculated by adding each byte in the message (1 through 14). GNS 480 (CNX80) Installation Manual 560-0982-01 Rev L...
  • Page 140: Message Data ( Format)

    The format of the fuel/air data computer input is as follows, which conforms to the Shadin “S” format serial message. Definition of the input message data that the GNS 480 uses is included in Table B-3. A sample input message is illustrated in Figure B-2.
  • Page 141 The format of the fuel/air data computer input is as follows, which conforms to the Shadin “Z” format serial message. Definition of the input message data that the GNS 480 uses is included in Table B-4. Baud rate: ..........9600 Data bits: ..........
  • Page 142: Message Data (Z Format)

    Current Latitude, s = N or S, dd = degrees, mm = minutes sdddmmhh Current Longitude, s = E or W, ddd = degrees, mm = minutes, hh = hundredths of minutes CKSM2 Checksum of labels S to X (0 to 255) 560-0982-01 Rev L GNS 480 (CNX80) Installation Manual...
  • Page 143 B.1.2.3 “PC-12” Data Format The format of the fuel input is as follows, which conforms to the PILATUS PC-12 format serial message. Definition of the input message data that the GNS 480 uses is included in Table B-45. Baud rate: ..........9600 Data bits: ..........
  • Page 144 (and optional TIS traffic). B.2.1 Mapcom Output When M is selected, the GNS 480 will transmit moving map data, nearest waypoint data, flight APCOM plan waypoints, and NAV/COM data on this output. The format of the MapCom output is as follows: Baud rate: ..........9600...
  • Page 145: Avigation D Ata

    = Parallel Track { ‘-‘ (off) || ‘O’(on) } h = Hold { ‘-‘ (off) || ‘O’(on) || ‘B’ (blink)} t = From/To {‘–‘ (off) || ‘T’ (To) || ‘F’ (From)} GNS 480 (CNX80) Installation Manual 560-0982-01 Rev L...
  • Page 146 = undefined Magnetic variation at waypoint nnnnnnnn LS byte (msbit...lsbit) nnnnnnnn MS byte (msbit...lsbit) Two’s complement binary in sixteenths of degrees, easterly variation is positive. <CR> ASCII carriage return (0Dh) B-10 560-0982-01 Rev L GNS 480 (CNX80) Installation Manual...
  • Page 147: List Data

    = 0 East longitude, 1 West longitude xhhhhhhh = undefined ddddddd = Longitude degrees mmmmmm = Longitude minutes hhhhhhh = Longitude hundredths of minutes ‘\r’ Item Terminator <0x0d> GNS 480 (CNX80) Installation Manual 560-0982-01 Rev L...
  • Page 148: Aypoint T Ype

    Pressure Altitude, +80 ft p+0008 vC000 VDI Valid, Needle Centered, Deflection is 000° Table B-7 <binary data> From Flight Plan Waypoint Type data, direct-to, airport type Figure B-3. Moving Map Data Output B-12 560-0982-01 Rev L GNS 480 (CNX80) Installation Manual...
  • Page 149 = desired frequency in kHz where k = (desired frequency / 25 kHz) + 30h, with the desired frequency in the range of 000 to 975 kHz in 25 kHz steps, or 0 to 39. GNS 480 (CNX80) Installation Manual 560-0982-01 Rev L...
  • Page 150 The following two commands work together in allowing the GNS 480 to provide a list of VOR frequencies to a remote device (such as the SL30). The GNS 480 will send a sequence of Remote VOR Input commands (message identifier 20). When all of the VOR Input commands have been sent, the GNS 480 will send a Remote VOR List Trailer command (message identifier 21) to terminate the list.
  • Page 151 The following two commands work together in allowing the GNS 480 to provide a list of localizer frequencies associated with an airport to a remote device (such as the SL30). The GNS 480 will first send the Remote Localizer List Header command (message identifier 22), followed by a sequence of Remote Localizer Input commands (message identifier 23).
  • Page 152 Identifier is “31 ”, indicating a runway, and the localizer frequency is 110.300 MHz. B.2.1.4.6 Distance/Speed/Time Message If an SL30 is connected to the GNS 480, the GNS 480 will send the following message to the SL30. $PMRRV41rrrrssshmm<CHECKSUM><CR><LF> rrrr is the distance to the station in 0.1nm units...
  • Page 153 LTITUDE OURCES C.1 A The following altitude sources are compatible with the GNS 480. Other altitude data sources may be used provided they meet the serial specifications defined in B.1.1 or provide the ARINC 429 labels defined in 2.8.10.2.1. Manufacturer...
  • Page 154 [1] If it is desired to have the F/ADC calculate wind data, ground speed and track angle must be provided to the FADC using a GNS 480 MAPCOM RS-232 output. If the MAPCOM data is not supplied to the FADC, the GNS 480 will calculate wind data using other data supplied by the FADC.
  • Page 155: A Vionics

    The following EHSIs are compatible with the GNS 480. Other EHSIs or navigation displays may be used with the GNS 480 provided that they accept serial data in the format defined in B.2.1 or ARINC 429 data as defined in 2.8.10.2.2.
  • Page 156: Optional

    1.6 or higher. SKY 899 optional discretes for mode control ARBON ONOXIDE ETECTOR YSTEMS C.8 C The following carbon monoxide detector systems are compatible with the GNS 480. Manufacturer Model Interface Notes CO Guardian Aero 452 RS-232 Aero 553...
  • Page 157 Figure D-11. Single GNS 480 Full Stack Interconnect Diagram Figure D-12. Full Stack with Dual GNS 480s Interconnect Diagram Figure D-13. GNS 480 to Sandel SN3308 NAV Display Interconnect Diagram Figure D-14. GNS 480 to CDI/HSI Source Select Annunciators Interconnect Diagram Figure D-15.
  • Page 158 Appendix D - Interconnect Diagrams Notes 560-0982-01 Rev L GNS 480(CNX80) Installation Manual...
  • Page 159: M Inimum

    5. THE GPS ANTENNA COAXIAL CABLE MUST BE DOUBLE OR TRIPLE SHIELDED AND THE GPS ANTENNA COAXIAL CABLE LOSS GNS 480 #2 (INCLUDING CONNECTORS) MUST BE BETWEEN 3dB AND 7dB. 6. GARMIN AT SPLITTER P/N 115-0007 (OR EQUIVALENT) MUST BE GPS #2 Ant USED. Garmin AT, Inc 2345 Turner Road S.E., Salem, OR 97302...
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  • Page 161 Appendix D - Interconnect Diagrams Figure D-2. Main Course Deviation Indicator Interconnect Diagram GNS 480 (CNX80) Installation Manual 560-0982-01 Rev L...
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  • Page 163 Appendix D - Interconnect Diagrams Figure D-3. Auxiliary CDI Interconnect Diagram GNS 480 (CNX80) Installation Manual 560-0982-01 Rev L...
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  • Page 165 Appendix D - Interconnect Diagrams Figure D-4. Baro Potentiometer/Synchro Heading/RMI Interconnect Diagram GNS 480 (CNX80) Installation Manual 560-0982-01 Rev L...
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  • Page 167: M Ounting

    3. RXD5 (P5-1/41) MAY BE USED INSTEAD OF RXD8 FOR ALTITUDE ENCODER. THE GNS 480 RX SERIAL PORT MUST BE CONFIGURED FOR ALT ENC AND 1200 OR 9600 BAUD, DEPENDING UPON WHICH SERIAL ALTITUDE FORMAT IS USED. THE GNS 480 WILL ACCEPT ALTITUDE DATA IN EITHER THE APOLLO/IIMORROW FORMAT (1200 BAUD) OR SHADIN FORMAT (9600 BAUD).
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  • Page 169: F Igure D-6. Gns

    Appendix D - Interconnect Diagrams Figure D-6. GNS 480 to SL10/15 Audio Panel Interconnect Diagram GNS 480 (CNX80) Installation Manual 560-0982-01 Rev L D-13...
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  • Page 171 Appendix D - Interconnect Diagrams Figure D-7. DME Tuning Interconnect Diagram GNS 480 (CNX80) Installation Manual 560-0982-01 Rev L D-15...
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  • Page 173 1. ALL WIRES 24 AWG OR LARGER UNLESS OTHERWISE SPECIFIED ARINC 429 #1 OUT ARINC DATA IN 2. AT GNS 480, CONNECT SHIELD GROUNDS TO THE REAR OF THE MOUNTING FRAME ON THE CONNECTOR PLATE -- THE SHIELD LEADS MUST BE LESS THAN 3.0 ". CONNECT OTHER SHIELD GROUNDS TO AIRCRAFT CHASSIS WITH AS SHORT A CONDUCTOR AS PRACTICAL.
  • Page 174 Appendix D - Interconnect Diagrams This page intentionally left blank. D-18 560-0982-01 Rev L GNS 480 (CNX80) Installation Manual...
  • Page 175 Appendix D - Interconnect Diagrams Figure D-9. Century Autopilot Interconnect Diagram GNS 480 (CNX80) Installation Manual 560-0982-01 Rev L D-19...
  • Page 176 Appendix D - Interconnect Diagrams This page intentionally left blank. D-20 560-0982-01 Rev L GNS 480 (CNX80) Installation Manual...
  • Page 177 Appendix D - Interconnect Diagrams Figure D-10. Bendix/King Autopilot Interconnect Diagram GNS 480 (CNX80) Installation Manual 560-0982-01 Rev L D-21...
  • Page 178 Appendix D - Interconnect Diagrams This page intentionally left blank. D-22 560-0982-01 Rev L GNS 480 (CNX80) Installation Manual...
  • Page 179 Appendix D - Interconnect Diagrams Figure D-11. Single GNS 480 Full Stack Interconnect Diagram GNS 480 (CNX80) Installation Manual 560-0982-01 Rev L D-23...
  • Page 180 Appendix D - Interconnect Diagrams This page intentionally left blank. D-24 560-0982-01 Rev L GNS 480 (CNX80) Installation Manual...
  • Page 181 SL70/70R SL70R: GRAY CODE ALT PGM PIN 36 MUST BE LEFT OPEN. RS232 RXD2 RS232 TXD6 6. EACH GNS 480 SHOULD EACH HAVE ALTITUDE INPUT DIRECTLY. THE SL70/70R DOES SERIAL GND 2 SERIAL GND 6 SERIAL GND NOT REQUIRE A DIRECT ALTITUDE CONNECTION, SINCE EITHER GNS 480 CAN...
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  • Page 183 9. USE OF THE GNS 480 PRECISION APPROACH DISCRETE (P5-68) WILL NOT ALLOW THE GLIDESLOPE INDICATOR TO BE DISPLAYED ON THE SANDEL UNLESS THE GNS 480 MAIN CDI IS SELECTED TO NAV. IF IT IS DESIRED TO SUSPEND IN HOLD CMD OUT...
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  • Page 185: F Igure D-14. Gns

    Appendix D - Interconnect Diagrams Figure D-14. GNS 480 to CDI/HSI Source Select Annunciators Interconnect Diagram GNS 480 (CNX80) Installation Manual 560-0982-01 Rev L D-29...
  • Page 186 Appendix D - Interconnect Diagrams This page intentionally left blank. D-30 560-0982-01 Rev L GNS 480 (CNX80) Installation Manual...
  • Page 187: F Igure D-15. Gns

    9. USE OF THE GNS 480 PRECISION APPROACH DISCRETE (P5-68) WILL NOT ALLOW THE GLIDESLOPE INDICATOR TO BE DISPLAYED ON THE SANDEL UNLESS THE GNS 480 MAIN CDI IS SELECTED TO NAV. IF IT IS DESIRED TO SUSPEND IN HOLD CMD OUT...
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  • Page 189: F Igure D-16. Gns

    GNS 480 1. ALL WIRES 24 AWG OR LARGER UNLESS OTHERWISE SPECIFIED. SANDEL SN3500 2. AT GNS 480, CONNECT SHIELD GROUNDS TO THE REAR OF THE MOUNTING REMOTE CDI FRAME ON THE CONNECTOR PLATE -- THE SHIELD LEADS MUST BE LESS SELECT BUTTON THAN 3.0 ".
  • Page 190 Appendix D - Interconnect Diagrams This page intentionally left blank D-34 560-0982-01 Rev L GNS 480 (CNX80) Installation Manual...
  • Page 191 Figure D-17. GNS 480 to GDU 620 Interconnect Diagram GNS 480 (CNX80) Installation Manual 560-0982-01 Rev L D-35...
  • Page 192 Notes D-36 560-0982-01 Rev...
  • Page 193 Aircraft Make and Model Designation Installation Requirements Raytheon (Beech) The GNS 480 must be installed in the manufacturer’s provided avionics stack. E33, E33A, E33C, F33, External CDI/HSI source selection annunciation is required. The CDI/HSI F33A, F33C, G33 source select annunciation must be installed in accordance with 2.5.3.2.
  • Page 194 Appendix E – Acceptable Aircraft by Evaluation Notes 560-0982-01 Rev L GNS 480 (CNX80) Installation Manual...
  • Page 195 Vivisun Aerospace Optics, 3201 Sandy Lane Fort Worth, Texas 76112, ph 1-888-VIVISUN. • Northern Airborne Technology Ltd. (NAT), #14-1925 Kirschner Road, Kelowna, BC, Canada, ph (250) 763-2232. • Mid-Continent Instrument Co Inc., 9400 E. 34 Street N., Wichita, KS 67226, ph (316) 630-0101 GNS 480 (CNX80) Installation Manual 560-0982-01 Rev L...
  • Page 196 Appendix F – Optional Accessories Not Supplied Notes 560-0982-01 Rev L GNS 480 (CNX80) Installation Manual...
  • Page 197: A-33 And A33W A Ntennas

    A33W. If any modification to the installation location is needed due to the larger sized antenna, a field approval will be required. See 560- 0949-01 Rev E or later. Figure G-1. Size Differential of the A-33 and A33W Antennas GNS 480 (CNX80) Installation Manual 560-0982-01 Rev L...
  • Page 198 Appendix G – Removal and Replacement Considerations Notes 560-0982-01 Rev L GNS 480 (CNX80) Installation Manual...

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