Name: Garmin GSU 75
Brand: Garmin
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190-01639-00 May, 2017 Revision 6

GSU 75 ADAHRS

Installation Manual

340095

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Default Chapter6
- Table of Contents6
Paragraph Page7
Section 1 GENERAL DESCRIPTION11
Section 1 GENERAL DESCRIPTION11
- Introduction11
- Figure 1-1. GSU 75 Unit View (in Rack)11
- Equipment Description12
Section 1 GENERAL DESCRIPTION13
- Interface Summary13
- Technical Specifications13
- Table 1-1 GSU 75 with 117-00608-00 Rack13
- Table 1-2 Physical Characteristics GMU 44 (011-00870-00, 011-00870-10)14
- Table 1-4 General Specifications15
- Table 1-5 Power Requirements15
- Certification16
- Table 1-7 TSO Authorizations for GSU 75 (011-03094-X0)16
- Table 1-8 TSO Deviations for GSU 75 (011-03094-X0)17
- Operating Instructions18
- Reference Documentation18
- Table 1-10 Referenced Publications18
Section 2 INSTALLATION OVERVIEW19
Section 2 INSTALLATION OVERVIEW19
- Introduction19
- Installation Materials19
- Table 2-1 GSU 75 Part Numbers19
- Table 2-2 GMU 44 Part Numbers19
- Table 2-3 GTP 59 Part Numbers19
- Equipment Available20
- Table 2-4 GSU 75 Accessories20
- Table 2-5 GMU 44 Accessories20
- Additional Equipment Required21
- Cabling and Wiring21
- Electrical Bonding21
Section 2 INSTALLATION OVERVIEW22
- Pneumatic Plumbing22
- Cooling Air22
- GTP 59 Icing22
- Figure 2-1 GSU 75 Air Hose Fitting Locations22
- Installation Approval Considerations for Pressurized Aircraft23
- Mounting Requirements24
- Figure 2-2 GSU 75 with Mounting Rack25
- Table 2-8 Recommended Distance from Magnetic Disturbances26
Section 3 INSTALLATION PROCEDURE28
Section 3 INSTALLATION PROCEDURE28
- Unpacking Unit28
- Wiring Harness Installation28
- Table 3-1 GSU 75 Pin Contact Part Numbers28
- Table 3-2 GMU 44 Pin Contact Part Number28
- Table 3-4 GMU 44 Recommended Crimp Tools29
- Table 3-3 GSU 75 Recommended Crimp Tools29
- Backshell Assembly and Installation30
- GSU 75/GMU 44 Interconnect Harness Fabrication Instructions30
- GSU 75/GTP 59 Interconnect Harness Fabrication Instructions31
- Table 3-5 Contents of GTP 59 Installation Kit (011-00978-00 )31
- Table 3-6 Parts Needed for GTP 59 to GSU 75 Installation (See Figure 3-2)31
Section 3 INSTALLATION PROCEDURE32
- Figure 3-1 Insulation to Pin/Socket Clearance32
- Figure 3-2 GTP 59 Sensor - GSU 75 Interconnect Harness33
- Figure 3-3 GTP 59 Outline and Installation Drawing34
- Pneumatic Connections35
- Figure 3-4 GSU 75 Air Hose Fitting Locations35
- Mounting Instructions36
- Figure 3-5 GSU 75 Mounting37
- Post Installation Configuration and Checkout38
- Continued Airworthiness38
Section 4 SYSTEM INTERCONNECTS39
Section 4 SYSTEM INTERCONNECTS39
- Pin Function List39
- Table 4-1 J751 Connector39
Section 4 SYSTEM INTERCONNECTS41
- Figure 4-2 Pigtail Connector J44141
- Table 4-2 J441 Pin Assignments41
- Power Functions42
- Table 4-3 GSU 75 Aircraft Power42
- Table 4-4 GMU 44 Input Power42
- Table 4-5 GSU 75 Magnetometer Power42
- Data Interfaces43
- Table 4-6 GSU 75 ARINC-42943
- Table 4-7 GSU 75 Configuration Module44
- Table 4-8 GSU 75 RS-232 I/O44
- Table 4-9 GMU 44 RS-232 I/O44
Table45
- GSU 75 Discrete Inputs45
- Table 4-10 GSU 75 RS-422 I/O45
- Table 4-12 GSU 75 Discrete Inputs45
- GSU 75 OAT (Outside Air Temperature) Probe46
- GSU 75 PPS (Pulse Per Second) Inputs46
- Table 4-13 GSU 75 OAT Probe I/O46
- Table 4-14 GSU 75 PPS Inputs46
Paragraph47
- GSU 75 ARINC 429 System ID Connections47
- GSU 75 System ID Inputs47
- Table 4-15. GSU 75 ARINC 429 System ID Connections47
- Table 4-16 GSU 75 System ID Inputs47
Procedure5-148
Section 5 POST INSTALLATION, CONFIGURATION, and CHECKOUT48
Procedure 5-148
Section 5 POST INSTALLATION, CONFIGURATION, and CHECKOUT PROCEDURE48
- Function Selector Switches and Display48
- Post-Installation Calibration Procedures48
- Table 5-1 Post-Installation Calibration Procedure Summary48
- Calibration Procedure A-1: Pitch/Roll Offset Compensation by Aircraft Leveling50
- Calibration Procedure A-2: Zero Pitch/Roll Offsets by Manual Entry51
Procedure5-152
Section 5 POST INSTALLATION, CONFIGURATION, and CHECKOUT52
- Calibration Procedure B: Magnetometer Calibration52
- Figure 5-1. Fixed-Wing and Helicopter Position Examples52
- Calibration Procedure C: Heading Offset Compensation54
- Calibration Procedure D: Engine Run-Up Vibration Test55
- Calibration Procedure E: Magnetometer Interference Test57
- Table 5-2 Fixed-Wing Aircraft Magnetometer Interference Test Sequence Example58
- Table 5-3 Helicopter Magnetometer Interference Test Sequence Example59
- Site Evaluation of Magnetic Disturbances for Magnetometer Calibration Procedure61
Appendix A ASSEMBLY and INSTALLATION DRAWINGS63
Appendix A ASSEMBLY and INSTALLATION DRAWINGS63
- Figure A-1 GSU 75 Outline Drawing63
- Figure A-2 GSU 75 Installation Drawing64
- Figure A-3 GMU 44 (-00) Mounting Rack65
- Figure A-4 GMU 44 (-10 and -20) Mounting Rack66
- Figure A-5 GMU 44 (-00 and -10) Top Mounted Installation67
- Figure A-6 GMU 44 (-00 and -10) Bottom Mounted Installation68
- Figure A-7 GMU 44 (-20) Top Mounted Installation69
- Figure A-8 GMU 44 (-20) Bottom Mounted Installation70
- Figure A-9 GMU 44 Connector Assembly71
- Figure A-10 GMU 44 Minimum Recommended Installation Clearance72
Appendix B INTERCONNECT DRAWING73
Appendix B INTERCONNECT DRAWING73
- Figure B-1 GSU 75 Example Interconnect73

Brand	Garmin
Model	GSU 75
Category	Avionics Display
Language	English

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