Installation Procedures
2-46
560-0982-01 Rev L
GNS 480 (CNX80) Installation Manual
as established in AC 43.13-1B, Chapter 10, section 2. Make appropriate entries in the equipment list
indicating items added, removed, or relocated along with the date accomplished. Include your name and
certificate number in the aircraft records. Table 2-12 identifies the weight of the new GNS 480 equipment
and Figure 2-13 shows the center of gravity.
Table 2-12. Unit Weights
Item Weight
GNS 480 only
5.8 lbs. (2.6 kg)
GNS 480 mounting tube only
0.7 lbs. (0.3 kg)
2.11
Electrical Load Analysis
An electrical load analysis should be completed on each aircraft prior to installation in accordance with
AC 43.13-1B, Chapter 11. Use the following values for computation:
Table 2-13. Unit Power Loads
14 VDC
28 VDC
GNS 480 Input
Typical Max Typical Max
GNS 480 Main Power (P1 connector)
with heater off
(1)
with heater on
(1)
1.4 A
2.4 A
2.2 A
3.2 A
700 mA
1.2 A
1.1 A
1.6 A
GNS 480 NAV Power (P7 connector)
450 mA
700 mA
200 mA
350 mA
GNS 480 COM Power (P4 connector)
receive
transmit
270 mA
2.1 A
350 mA
3.2 A
130 mA
1.0
175 mA
1.6
Notes:
(1)
Backlight heater element turns on when internal temperature is below approximately 42
°
C.
(2)
Installations using the Main Power connector P1 to feed power to the NAV Power connector P7 must
add the NAV Power load to the Main Power load values.
NOTE
Circuits should be protected in accordance with guidelines in AC 43.13-1B, chapter 11,
section 4.
Power inputs should be across a minimum of all four specified input pins
.
Summary of Contents for GNS 480
Page 1: ...GNS 480 CNX80 Color GPS NAV COM Installation Manual November 2008 560 0982 01 Rev L...
Page 10: ...Table of Contents viii 560 0982 01 Rev L GNS 480 CNX80 Installation Manual Notes...
Page 32: ...General Information 1 22 560 0982 01 Rev L GNS 480 CNX80 Installation Manual Notes...
Page 80: ...Installation Procedures 2 48 560 0982 01 Rev L GNS 480 CNX80 Installation Manual Notes...
Page 134: ...Periodic Maintenance 6 2 560 0982 01 Rev L GNS 480 CNX80 Installation Manual Notes...
Page 158: ...Appendix D Interconnect Diagrams D 2 560 0982 01 Rev L GNS 480 CNX80 Installation Manual Notes...
Page 192: ...D 36 560 0982 01 Rev Notes...
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