Page 6-2 G900X/G950 Installation and Maintenance Manual – GDC 74A
Revision D
190-00719-00
6.1.1 Interface
Summary
The GDC 74A provides the following interface connections via the rear connector.
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ARINC 429 Output to GRS 77 AHRS
•
2 ARINC 429 Outputs to GDU 104X PFD/MFD and GIA 63W Integrated Avionics Units
•
4 ARINC 429 Inputs from external sensors (as applicable per installation)
•
RS-232 Interface with GIA 63W Integrated Avionics Units
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2 Aircraft Power Inputs
•
Temperature Probe Interface for GTP 59
6.2 Electrical
Specifications
Table 6-1 contains a list of electrical
specifications for the GDC 74A.
Table 6-1. GDC 74A Electrical Specifications
Specification Characteristic
Power Requirements
Supply Voltage: 14/28 VDC;
See the Environmental Qualification Form for details on surge ratings
and minimum/maximum operating voltages.
See Table 1-3 for current specifications.