Page 2-2
G900X/G950 Installation and Maintenance Manual – GDU 1040
Revision D
190-00719-00
2.1.3 System Interface Functions
•
Interfacing with the GIA 63W Integrated Avionics Unit (IAU) and other GDU 1040
•
Control and display of dual communications transceivers operating in the 118.00 to 136.975 MHz
range in 8.33 kHz or 25 kHz frequency spacing
•
Control and display of dual VOR/ILS receivers tuning from 108.00 to 117.95 MHz in 50 kHz
increments
•
Control and display of transponder(s) GTX 33, GDU 1040, GWX 68, and GDL 69(A) data link,
etc.
2.1.4 Interface
Summary
The GDU 1040 is designed as an open architecture system that uses typical ARINC 429, RS-232, and
Ethernet communications interfaces. The GDU 1040 communicates with the following LRUs:
•
GRS 77 AHRS
•
GDC 74A Digital Air Data Computer
•
Other GDU 1040
•
GMA 1347 Audio Panel
•
GIA 63W IAU
•
GDL 69(A) Data Link (optional)
•
GCU 476 FMS Controller (optional)
•
GWX 68 Weather Radar (optional)
2.2 Electrical
Characteristics
Table 2-1. GDU 1040 Electrical Characteristics
Characteristics Specifications
Power Requirements
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.
2.2.1 Power
Consumption
Ambient temperature above -15
°C:
14V (Maximum)
14V (Typical)
28V (Maximum)
28V (Typical)
GDU 104X
2.71 Amps
2.36 Amps
1.25 Amps
1.07 Amps
Ambient temperature at or below -15
°C:
14V (Maximum)
14V (Typical)
28V (Maximum)
28V (Typical)
GDU 104X
3.36 Amps
3.00 Amps
2.50 Amps
2.32 Amps