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GSU 75
Garmin GSU 75 User Manual
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190-01639-00
GSU 75 ADAHRS Installation Manual
Rev. 6
Page 4-3
4.1.2
GMU 44 Connector J441
Figure 4-2 Pigt
ail Connector J441
66
ARINC 429 IN AHRS 2B
In
67
ARINC 429 IN AHRS 3B
In
68
RS-232 ADC 1 GROUND
--
69
RS-232 OUT ADC 1
Out
70
RS-232 IN ADC 1
In
71
RS-232 OUT AHRS 2
Out
72
RS-232 IN AHRS 2
In
73
RS-232 AHRS 2 GROUND
--
74
CONFIG MODULE GROU
ND
--
75
SYS ID 1*
In
76
DISCRETE IN 3*
In
77
DISCRETE IN 4
In
78
DISCRETE IN 2*
In
T
able 4-2 J441 Pin Assignment
s
Pin
Pin Name
I/O
1
SIGNAL GROUND
--
2
RS-485 OUT B
Out
3
SIGNAL GROUND
--
4
RS-485 OUT A
Out
5
SPARE
--
6
POWER GROUND
--
7
SPARE
--
8
RS-232 IN
In
9
+12 VDC POWER
In
T
able 4-1 J751 Connector
Pin
Pi
n Name
I/O
*Indicates active low
340095
The document reference is online, please check the correspondence between the online documentation and the printed version.
40
42
Table of Contents
Default Chapter
6
Table of Contents
6
Paragraph Page
7
Section 1 GENERAL DESCRIPTION
11
Section 1 GENERAL DESCRIPTION
11
Introduction
11
Figure 1-1. GSU 75 Unit View (in Rack)
11
Equipment Description
12
Section 1 GENERAL DESCRIPTION
13
Interface Summary
13
Technical Specifications
13
Table 1-1 GSU 75 with 117-00608-00 Rack
13
Table 1-2 Physical Characteristics GMU 44 (011-00870-00, 011-00870-10)
14
Table 1-4 General Specifications
15
Table 1-5 Power Requirements
15
Certification
16
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 Instructions
18
Reference Documentation
18
Table 1-10 Referenced Publications
18
Section 2 INSTALLATION OVERVIEW
19
Section 2 INSTALLATION OVERVIEW
19
Introduction
19
Installation Materials
19
Table 2-1 GSU 75 Part Numbers
19
Table 2-2 GMU 44 Part Numbers
19
Table 2-3 GTP 59 Part Numbers
19
Equipment Available
20
Table 2-4 GSU 75 Accessories
20
Table 2-5 GMU 44 Accessories
20
Additional Equipment Required
21
Cabling and Wiring
21
Electrical Bonding
21
Section 2 INSTALLATION OVERVIEW
22
Pneumatic Plumbing
22
Cooling Air
22
GTP 59 Icing
22
Figure 2-1 GSU 75 Air Hose Fitting Locations
22
Installation Approval Considerations for Pressurized Aircraft
23
Mounting Requirements
24
Figure 2-2 GSU 75 with Mounting Rack
25
Table 2-8 Recommended Distance from Magnetic Disturbances
26
Section 3 INSTALLATION PROCEDURE
28
Section 3 INSTALLATION PROCEDURE
28
Unpacking Unit
28
Wiring Harness Installation
28
Table 3-1 GSU 75 Pin Contact Part Numbers
28
Table 3-2 GMU 44 Pin Contact Part Number
28
Table 3-4 GMU 44 Recommended Crimp Tools
29
Table 3-3 GSU 75 Recommended Crimp Tools
29
Backshell Assembly and Installation
30
GSU 75/GMU 44 Interconnect Harness Fabrication Instructions
30
GSU 75/GTP 59 Interconnect Harness Fabrication Instructions
31
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 PROCEDURE
32
Figure 3-1 Insulation to Pin/Socket Clearance
32
Figure 3-2 GTP 59 Sensor - GSU 75 Interconnect Harness
33
Figure 3-3 GTP 59 Outline and Installation Drawing
34
Pneumatic Connections
35
Figure 3-4 GSU 75 Air Hose Fitting Locations
35
Mounting Instructions
36
Figure 3-5 GSU 75 Mounting
37
Post Installation Configuration and Checkout
38
Continued Airworthiness
38
Section 4 SYSTEM INTERCONNECTS
39
Section 4 SYSTEM INTERCONNECTS
39
Pin Function List
39
Table 4-1 J751 Connector
39
Section 4 SYSTEM INTERCONNECTS
41
Figure 4-2 Pigtail Connector J441
41
Table 4-2 J441 Pin Assignments
41
Power Functions
42
Table 4-3 GSU 75 Aircraft Power
42
Table 4-4 GMU 44 Input Power
42
Table 4-5 GSU 75 Magnetometer Power
42
Data Interfaces
43
Table 4-6 GSU 75 ARINC-429
43
Table 4-7 GSU 75 Configuration Module
44
Table 4-8 GSU 75 RS-232 I/O
44
Table 4-9 GMU 44 RS-232 I/O
44
Table
45
GSU 75 Discrete Inputs
45
Table 4-10 GSU 75 RS-422 I/O
45
Table 4-12 GSU 75 Discrete Inputs
45
GSU 75 OAT (Outside Air Temperature) Probe
46
GSU 75 PPS (Pulse Per Second) Inputs
46
Table 4-13 GSU 75 OAT Probe I/O
46
Table 4-14 GSU 75 PPS Inputs
46
Paragraph
47
GSU 75 ARINC 429 System ID Connections
47
GSU 75 System ID Inputs
47
Table 4-15. GSU 75 ARINC 429 System ID Connections
47
Table 4-16 GSU 75 System ID Inputs
47
Procedure5-1
48
Section 5 POST INSTALLATION, CONFIGURATION, and CHECKOUT
48
Procedure 5-1
48
Section 5 POST INSTALLATION, CONFIGURATION, and CHECKOUT PROCEDURE
48
Function Selector Switches and Display
48
Post-Installation Calibration Procedures
48
Table 5-1 Post-Installation Calibration Procedure Summary
48
Calibration Procedure A-1: Pitch/Roll Offset Compensation by Aircraft Leveling
50
Calibration Procedure A-2: Zero Pitch/Roll Offsets by Manual Entry
51
Procedure5-1
52
Section 5 POST INSTALLATION, CONFIGURATION, and CHECKOUT
52
Calibration Procedure B: Magnetometer Calibration
52
Figure 5-1. Fixed-Wing and Helicopter Position Examples
52
Calibration Procedure C: Heading Offset Compensation
54
Calibration Procedure D: Engine Run-Up Vibration Test
55
Calibration Procedure E: Magnetometer Interference Test
57
Table 5-2 Fixed-Wing Aircraft Magnetometer Interference Test Sequence Example
58
Table 5-3 Helicopter Magnetometer Interference Test Sequence Example
59
Site Evaluation of Magnetic Disturbances for Magnetometer Calibration Procedure
61
Appendix A ASSEMBLY and INSTALLATION DRAWINGS
63
Appendix A ASSEMBLY and INSTALLATION DRAWINGS
63
Figure A-1 GSU 75 Outline Drawing
63
Figure A-2 GSU 75 Installation Drawing
64
Figure A-3 GMU 44 (-00) Mounting Rack
65
Figure A-4 GMU 44 (-10 and -20) Mounting Rack
66
Figure A-5 GMU 44 (-00 and -10) Top Mounted Installation
67
Figure A-6 GMU 44 (-00 and -10) Bottom Mounted Installation
68
Figure A-7 GMU 44 (-20) Top Mounted Installation
69
Figure A-8 GMU 44 (-20) Bottom Mounted Installation
70
Figure A-9 GMU 44 Connector Assembly
71
Figure A-10 GMU 44 Minimum Recommended Installation Clearance
72
Appendix B INTERCONNECT DRAWING
73
Appendix B INTERCONNECT DRAWING
73
Figure B-1 GSU 75 Example Interconnect
73
5
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Garmin GSU 75 Specifications
General
Brand
Garmin
Model
GSU 75
Category
Avionics Display
Language
English
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