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Revision A5 3-24

GRT Avionics HXr Installation Manual

Volume level will be controlled by menu settings within the display unit. (NOTE: This option is not

yet available, but Pin B24 has been reserved for it.)

3.10 Trim and Flap Servos and Sensors

Flap & trim position indicators may be displayed on the EFIS screen using the analog inputs. Pull-up
resistors for these sensors are provided internally in the HX and HXr systems; if used, they must
be turned on in the Setup Menu. Use Trim/Flap Sensor Installation wiring diagram & notes in the

Appendix of this manual for wiring and setup guidance.

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Summary of Contents for HXr

Page 1: ...HXr Installation Manual Revision A5 7 May 2015 ...

Page 2: ...HXr Installation Manual GRT Avionics ii Revision A5 3133 Madison Ave SE Wyoming MI 49548 616 245 7700 www grtavionics com Copyright 2013 ...

Page 3: ...ure that the information in this manual is accurate and complete Visit the GRT website www grtavionics com for the latest manual updates software updates and supplemental information concerning the operation of this and other GRT products GRT is not responsible for unintentional errors or omissions in the manual or their consequences Information in the document is subject to change without notice ...

Page 4: ... A14 A4 03 Apr 2013 1e Added note about internal pull up resistors for trim flap sensors to trim flap sensor wiring diagram A14 and Section 3 10 Fixed backwards connector diagram on AHRS connector pinout A11 A5 20 Feb 2015 1f Updated to include mounting for Adaptive AHRS and digital magnetometer RECORD OF REVISIONS Section Date Revision Notes Foreword 05 Mar 2015 1 05 Mar 2015 2 05 Mar 2015 3 05 M...

Page 5: ...nsiderations 14 2 2 GADAHRS Installation 14 2 2 Legacy Equipment AHRS Part No AAS Installation 17 2 3 Legacy Equipment Magnetometer Installation for AHRS Part No AAS 18 2 3 GSNS GPS from the Adaptive AHRS 19 2 4 Cooling Considerations 20 2 5 Pitot Static Connections 20 3 1 General Guidelines 21 3 2 Power Connections 21 3 3 Ground Connections 22 3 4 AHRS OAT Wiring 22 3 4 1 Magnetometer Wiring 22 3...

Page 6: ... Out 25 4 2 AHRS Air Data Computer Test 25 4 3 Magnetometer Location Validation 26 4 4 Check Uncorrected Magnetic Heading 26 4 5 Magnetometer Calibration Procedure 27 4 6 ARINC Checkout Procedure 30 Section 5 Equipment Interconnect Details 31 5 1 Serial Ports 31 5 2 Inter Display Link 31 5 3 ARINC 429 31 5 4 Analog Input 31 5 5 USB Ports 31 5 6 GRT GPS Modules 32 5 7 Specific Equipment Interconnec...

Page 7: ...AHRS 2 is standard with the dual display system while the single AHRS AHRS 1 is standard with a single display The Dual AHRS is two identical AHRS units inside one module this assures that both AHRS units are aligned with each other at all times Dual AHRS is available with a single screen system as an option The most basic configuration for HXr is a single EFIS screen to display the primary flight...

Page 8: ... GRT HXr through RS 232 serial ARINC 429 RS 422 and USB ports VOR localizer data traffic alerts and in flight weather are very common additions that are easily displayed on the EFIS screen The HXr features the capability to mount the radio transponder and engine monitor in a remote location to simplify the design of the instrument panel The addition of a second or third display unit doubles or tri...

Page 9: ...ch as a transponder that uses encoder data from the EFIS During the display unit Setup Procedure you will use the system Setup Guide or Equipment Supplement to program the display unit and tell it which device uses each serial port and which baud rate it requires Data is transported through the serial ports to make the devices work A stream of serial data is like a sentence and data packets are li...

Page 10: ...getting near the EFIS or the rest of the instrument panel Note The Android app is still in development at GRT the beta version will be available for free download by the end of 2012 The Bluetooth transmitter dongle is a tiny device about the size of a thumbnail that plugs into one of the USB ports in the back of the display unit Physical Wiring All the wires supplied with the EFIS system are 22 ga...

Page 11: ...at we cannot even begin to discuss in this manual The techs at GRT recommend the following sources for more information on proper aircraft avionics electrical system design by Bob Nuckolls is a great place to start This manual covers everything from the very basics of electricity to the proper design and installation of sophisticated IFR capable systems Longtime EAA columnist Tony Bingelis s books...

Page 12: ...al Display package and may be equipped with similar options The EFIS to EFIS wiring harness supplied will accommodate the number of display units supplied Single Display Package Qty Part Number Description 1 MFD HXr 10 4 Multi Function Display HXr EFIS optional 12 1 1 AHRS 1 Attitude Heading Reference System w Magnetometer single 1 OAT 03 Outside Air Temperature Probe 1 CAB HX KIT 01 Display Unit ...

Page 13: ... 13 Revision A5 HXr EFIS Options Qty Part Number Description GPS H E GRT External GPS Module GPS RAIM H E RAIM GPS Module GPS LPV TSO C145c IFR GPS Varies Engine Monitor Package EIS XM WEATHER XM Weather Receiver USB EXT USB Extension Cable ...

Page 14: ...rplanes also Ÿ AC23 1311 1B Installation of Electronic Displays in Part 23 Airplanes Ÿ AC 20 138A Airworthiness Approval of Global Navigation Satellite System Equipment 2 2 AHRS Installation The Adaptive GPS AHRS Air data computer provides airplane with GPS navigation data one or two attitude heading reference systems and an air data computer It accepts an input from a GPS antenna and an external ...

Page 15: ...ettings are accessed via SET MENU AHRS Maintenance Set AHRS orientation This setting screen provides the following settings AHRS Orientation Lock After setting the orientation of the AHRS the display unit locks access to this setting requiring that it be unlocked before the user can alter the AHRS orientation setting The lock feature prevents inadvertent altering of the selected AHRS orientation a...

Page 16: ...t of the airplane longitudinal axis in the direction of the nose CAUTION Adjusting the roll pitch or yaw orientation of the AHRS requires will reduce the accuracy of the magnetometer data A fine magnetometer calibration should be performed after these settings are changed 2 3 Adaptive AHRS Digital Magnetometer Installation The digital magnetometer supplied with your adaptive AHRS includes internal...

Page 17: ... be met The magnetometer is marked with an arrow pointing in the direction of flight This will position the d sub connector on the aft side Mount it such that the centerline of the magnetometer is parallel to the centerline of the airplane from a top view The pitch attitude of the magnetometer should be within the range of 60 degrees 2 2 Legacy Equipment AHRS Part No AAS Installation The AHRS is n...

Page 18: ...is located within 2 feet of retractable landing gear operate the landing gear 4 Operate the comm radio transmit and transponder IDENT Observe the compass while doing each of the above The goal is no movement or compass movement of less than 5 degrees If you observe greater movement try another location After the installation and wiring of the magnetometer and display unit s is complete a more sens...

Page 19: ...The output from this GPS may be shared with all GRT EFIS display units as desired as well as at least two other devices such as an ELT transponder etc If these other devices impart too much load on the serial output the signal level will be reduced and some or all of these device will receive no data Configuring the Serial Port for data to the GPS An optional serial output from the display unit to...

Page 20: ... conduction Even a stand alone unit operates at a higher temperature in still air than in moving air The Horizon HXr contains an internal cooling fan Be sure that there is adequate air available so that it can cool the display unit A few openings in the glare shield are usually more than adequate to allow natural air flow If external forced air is used be certain that the cooling air does not cont...

Page 21: ...sideration should be given to avoid routing wires near antennas or other locations that could impart high levels of electromagnetic signals on the wiring Ÿ The checkout procedures outlined in Section must be completed to verify the EFIS is not affected by radio transmissions on any frequency Ÿ Consider the effects of individual component failures in the design of the system as a whole to create re...

Page 22: ...b pins would need to be installed If the wires are not cut inspect the D sub connector pins to verify they have not been damaged Insert the indicated wire color into the appropriate D sub connector housing hole according to the appropriate pinout diagram located in the Appendix of this manual If desired the crimp type D sub connector can be replaced with a solder type connector All magnetometer co...

Page 23: ...the data from the US GPS system the Russian Glonass as well as Japanese and European systems that are being developed The output from this GPS may be shared with all GRT EFIS display units as desired as well as at least two other devices such as an ELT transponder etc If these other devices impart too much load on the serial output the signal level will be reduced and some or all of these device w...

Page 24: ...erved for it 3 10 Trim and Flap Servos and Sensors Flap trim position indicators may be displayed on the EFIS screen using the analog inputs Pull up resistors for these sensors are provided internally in the HX and HXr systems if used they must be turned on in the Setup Menu Use Trim Flap Sensor Installation wiring diagram notes in the Appendix of this manual for wiring and setup guidance ...

Page 25: ...less than 2 minutes c No ATTITUDE FAIL message is shown on the PFD screen d No failure messages are listed on the EFIS screen check lower left corner for MSG box 4 Press MORE softkey then SET MENU Select the AHRS Maintenance page 5 Verify AHRS communications status is valid and AHRS status is OK Verify the AHRS is receiving serial communications from the display unit by observing that no data fiel...

Page 26: ... landing gear support the aircraft using proper jacking equipment then repeat Step 1 while operating the landing gear e If greater than 2 degree change is noted either relocate the magnetometer or the offending wiring or metallic materials Recheck The most common cause is simply magnetic disturbances near the magnetometer This can be caused by ferrous metal any metal that a magnet will stick to co...

Page 27: ...plane and continue to taxi for several seconds for the GPS to accurately determine your ground track The GPS cannot determine your track unless you are moving 2 After the aircraft is positioned accurately turn ON the EFIS If it was already on then turn it OFF and then back ON again 3 Allow at least 1 minute for the AHRS to fully stabilize 4 Press the MORE soft key then the SET MENU soft key Scroll...

Page 28: ...e toward magnetic north 12 Turn ON the AHRS if already ON turn it OFF and then back ON 13 Verify the AHRS on AHRS Maintenance page shows a heading close to north Small errors are likely to be a result of not positioning the airplane to the exact heading used during magnetometer calibration 14 Select the Magnetometer Calibration page Do not activate the calibration this time 15 Rotate the airplane ...

Page 29: ...ause it is dependent on how carefully the user performed these steps The calibration data should be cross checked with reliable ground references such as a compass rose or runway headings before flight Congratulations Magnetometer calibration is now complete ...

Page 30: ... be increasing The counter can increase even if the input is wired backwards so the data must also be verified Verifying Valid Data The status menu will show labels for data it expects to receive For each device that sends ARINC data to the EFIS if any data can be confirmed the interface can be assumed 100 functional For example if a Garmin 430 is wired to the EFIS it will send the VOR ILS frequen...

Page 31: ...communicate directly to multiple screens for redundancy but the number of serial ports available may limit this Data may also be shared via the Inter Display Unit Link which allows the serial ports to be used for more devices If more than two HXr displays are connected it is necessary to use an ethernet hub 5 3 ARINC 429 All Horizon HXr units have a built in ARINC module independent of the eight s...

Page 32: ...nd or a GRT Avionics GPS receiver GRT offers two GPS receiver options The Adaptive AHRS may include an optional WAAS GPS GSNS receiver within it or the GRT Avionics RAIM GPS module may be used Please note that the GRT RAIM and WAAS GPS GSNS receivers do not meet the certification requirements for stand alone use for IFR flight at this time However the RAIM function does provide integrity monitorin...

Page 33: ...on Notes A 5 AHRS Installation Notes A 6 Wiring Harness Details Connector A Pinout Diagram A 7 Connector B Pinout Diagram A 8 Connector C ARINC 429 Pinout Diagram A 9 AHRS Display Unit Interconnect Diagram A 10 AHRS Connector Pinout Diagram A 11 Magnetometer Connector Pinout Diagram A 12 Sample Hardware Interconnect Diagrams HXr System Interconnect Diagram A 13 Trim Flap Position Sensors A 14 Appe...

Page 34: ...tion Manual GRT Avionics A 2 Revision A5 10 49 7 96 10 4 HXr Mounting Template Rev B 11 16 12 NOTES Ÿ Panel Cutout Dimensions 9 81 inches wide x 7 79 inches tall Ÿ Mounting screw holes are 0 1495 dia Ÿ Not to Scale ...

Page 35: ...stallation Manual Revision A5 A 3 NOTES Ÿ Panel Cutout Dimensions 11 13 inches wide x 8 79 inches tall Ÿ Mounting screw holes 0 1495 dia Ÿ Not To Scale 11 83 9 00 12 1 HXr Mounting Template 11 51 in 4 00 in Rev B 11 16 12 ...

Page 36: ...xternal Module Footprint and Mounting Holes Ÿ External GPS module Ÿ RAIM GPS module Ÿ ARINC module Ÿ Magnetometer Notes Ÿ Drawing shows height of module mounting platform only Ÿ GPS and ARINC modules are 9 16 taller than mount Ÿ Allow an extra 3 above ARINC module for D sub connector ...

Page 37: ...s display the magnetic field strength and the direction of the magnetic field Use the app to measure the earth magnetic field strength when far from any possible sources of magnetic interference Then place the phone in the proposed location of the magnetometer and verify the field strength in this location is unchanged Next move the flight controls turn on power to everything in the airplane and o...

Page 38: ...ounted in the cabin to minimize the possibility of the formation of condensation 2 See section 3 for mounting orientation options 3 The mounting location should not expose the AHRS Air Data computer to direct airflow from cabin heat or fresh air vents 4 The structure to which the unit is mounted to must be rigid Mounting Flange Pitot Static Ports Ahrs_B cdr 2 24 04 Position this end toward Adaptiv...

Page 39: ...C A9 NC A10 NC A11 NC A12 NC A13 NC A14 _ Primary Power IN RED A15 Secondary Power IN A16 Third Power IN A17 _ Ground BLK A18 s GPS Memory Note 1 RED WHT A19 Serial 2 IN AHRS 1 IN Note 2 YEL A20 Serial 1 IN A21 _ Serial 4 IN EIS IN Note 3 GRN BLK A22 s Serial 5 IN GPS YEL BLU A23 s Serial 3 IN GRY RED A24 Serial 6 IN Redundant AHRS Note 2 YEL GRY A25 s Serial 3 OUT GRY BLK _ Connected to wiring ha...

Page 40: ...special order Wiring Harness Connector B as viewed from REAR wired side Pin Function Wire Color B25 NC B24 Reserved for Audio output future use B23 s Serial 7 IN ORG BLK B22 s Serial 7 OUT ORG B21 Analog 1 IN B20 Analog 2 IN B19 Analog 3 IN B18 Analog 4 IN B17 Analog 5 IN B16 Analog 6 IN B15 Analog 7 IN B14 Analog 8 IN B13 Discrete Output 6 B12 Discrete Output 5 B11 Discrete Output 4 B10 Discrete ...

Page 41: ...in D sub connector along with eight male pins and a backshell are included with the display unit No wires are included because most devices use ARINC 429 already have a wiring harness Pin Function C1 ARINC 429 IN 1 A C2 ARINC 429 IN 1 B C3 ARINC 429 IN 2 A C4 ARINC 429 IN 2 B C5 ARINC 429 OUT A C6 Spare Ground C7 Spare Ground C8 Spare Ground C9 ARINC 429 OUT B May be used for shield ground 5 1 6 9...

Page 42: ...tiple display units Display Unit 1 OUT IN AHRS 2 Display Unit 2 IN OUT AHRS 1 Dual Display Units Dual AHRS Display Unit 1 OUT AHRS 2 IN AHRS 1 Serial Port 2 Serial Port 6 IN Out Single Display Unit Dual AHRS Serial Port 2 Serial Port 2 Serial 6 IN Serial 6 IN Serial 1 OUT Serial 1 IN Serial 2 OUT Serial 2 OUT Serial 1 IN Serial 1 OUT Serial 1 IN Serial 1 OUT Serial 1 OUT Serial 1 IN ...

Page 43: ... Out 1 YEL 2 AHRS1 Serial Out 1 Note 1 3 p AHRS1 Serial Out 2 dual display only YEL GRY 4 AHRS1 Serial Out 2 Note 1 5 _ AHRS1 Serial In BRN 6 Reserved Do Not Connect 7 Reserved Do Not Connect 8 _ Magnetometer Serial In WHT BRN 9 AHRS2 Power In A 9 30 Vdc 0 1A RED WHT 10 p Outside Air Temperature IN Gray 11 Reserved Do Not Connect 12 Reserved Do Not Connect 13 _ Ground Interchangable with pin 14 BL...

Page 44: ...s This is accomplished by connecting the serial output from the magnetometer to as many devices a desired If a battery backup is included in a Mini that is using a magnetometer we recommend wiring to it for the magnetometer power and ground so that it remains powered in the event the airplane is flown on this backup Similarly if no Mini EFIS systems are in the airplane but one AHRS is provided wit...

Page 45: ...se of the AHRS 4 The pitch orientation of the AHRS Air Data Computer is not critical but should match the longitudinal fuselage reference line or if this is not available be oriented so that it is level in pitch when the airplane is in a 0 degree angle of attack attitude 5 The magnetometer must be mounted in the same orientation as the AHRS Air Data Computer The alignment between the magnetometer ...

Page 46: ...Then place the phone in the proposed location of the magnetometer and verify the field strength in this location is unchanged Next move the flight controls turn on power to everything in the airplane and observe that the strength and direction of the field does not change 7 The magnetometer must be mounted in the same orientation as the AHRS Air Data Computer to within 0 5 degrees This is most eas...

Page 47: ...t long except for the magnetometer wires which are 20 feet long Pin Function Wire Color 1 _ Serial Out 1 YEL 2 Serial Out 1 Note 1 3 _ Serial Out 2 dual display only YEL GRY 4 Serial Out 2 Note 1 5 _ Serial In 1 BRN 6 Serial In 2 do not use 7 _ Magnetometer Z IN WHT 8 _ Magnetometer Y IN WHT BRN 9 _ Magnetometer X IN WHT GRN 10 _ Outside Air Temperature IN Gray 11 NC 12 NC 13 _ Ground BLK 14 _ Mag...

Page 48: ... provided without the connector attached for easier routing through the airframe Use the following diagram to attach the connector to the cable after running the wires Be sure to inspect the pins before inserting them into the D sub as damage can occur from pulling them through holes in the airframe Pin Function Wire Color 1 MAG Y WHT BRN 2 MAG Z WHT 3 MAG X WHT GRN 4 MAG PWR WHT RED 5 MAG GND BLK...

Page 49: ...GRT Avionics HXr Installation Manual Revision A5 A 17 ...

Page 50: ...OMPANY trim motor or position sensor Note 2 EFIS setup SET MENU GENERAL SETUP ANALOG 1 8 whichever is wired Selections are FLAPS AILERON TRIM ELEVATOR TRIM OR RUDDER TRIM Note 3 EFIS setup SET MENU GENERAL SETUP ANALOG 1 8 whichever is wired Turn Pull Up Resistor ON Note 4 SET MENU GENERAL SETUP Set Elevator Trim Orientation DOWN trim at TOP or UP trim at TOP Note 5 Complete the flap and or trim c...

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