190-01639-00 GSU 75 ADAHRS Installation Manual
Rev. 6 Page 1-3
1.3 Interface Summary
The following is an interface summary for the GSU 75, GTP 59 and GMU 44. See Appendix B for
connection details.
• GTP 59 to GSU 75 Interface: Power, Analog
• GMU 44 to GSU 75 Interface: Power, RS-232, RS-485
• 3 ARINC 429 ADC (Air Data Computer) Inputs (individually selectable high or low speed)
• 3 ARINC 429 ADC Outputs (individually selectable high or low speed)
• 3 ARINC 429 AHRS (Attitude and Heading Reference System) Inputs (individually selectable
high or low speed)
• 4 ARINC 429 ADAHRS (Air Data and Attitude Heading Reference System) Outputs (High
Speed; 3 Independent, 1 Redundant; configurable to all output only AHRS data or combined ADC
and AHRS data)
• 1 RS-232 ADC Input/Output from GIA 6X (Garmin Integrated Avionics Units)
• 2 RS-232 AHRS Inputs/Outputs from GIA 6X (Garmin Integrated Avionics Units)
• 2 PPS Inputs
• 4 Discrete Inputs
• 2 System ID Program pins
• 2 Aircraft Power Inputs
1.4 Technical Specifications
1.4.1 Environmental Qualification Form
The Environmental Qualification Forms are available directly from Garmin under the following
part numbers:
GSU 75 Environmental Qualification Form, Garmin part number 005-00770-01
GMU 44 Environmental Qualification Form, Garmin part number 005-00164-31
1.4.2 Physical Characteristics
Table 1-1 GSU 75 with 117-00608-00 Rack
Characteristic Specification
Weight, Unit Only 1.36 lbs (0.62 kg)
Weight, Unit with Rack and Connectors 1.72 (0.78 kg)
Height (w/Rack and Connectors) 2.76 inches (70.1 mm)
Width (w/Rack and Connectors) 3.00 inches (76.2 mm)
Depth (w/Rack and Connectors) 6.57 inches (166.9 mm)
The document reference is online, please check the correspondence between the online documentation and the printed version.
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