Page 9-2
G900X/G950 Installation and Maintenance Manual – GCU 476
Revision D
190-00719-00
9.2 Electrical
Specifications
Table 9-1. GCU 476 Electrical Specifications
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.
9.3 Environmental
Specifications
Table 9-2. GCU 476 Environmental Specifications
Characteristics
Specifications
Operating Temperature Range
-45°C to +70°C. For more details see Environmental
Qualification Form.
Humidity 95%
non-condensing
Altitude Range
-1,500 ft to 55,000 ft
9.3.1 Environmental Qualification Form
Refer to the GCU 476 Environmental Qualification Form, Garmin part number 005-00219-01, for a
complete list of environmental characteristics.