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IFD5XX Installation Manual
600-00299-000
Page 49 of 198
Revision: 02
The installer is responsible for preservation of multiple power busses on the aircraft in
accordance with manufacturer's original design and the requirements of 14 CFR Part 23. This
includes maintaining electrical power to essential equipment.
4.10 Electrical Load Analysis
Prior to installing the IFD5XX, an electrical load analysis (ELA) must be performed. The
aircraft’s electrical load should be less than 80% of the total generator output following the
IFD5XX installation, reference Section 1.4 for IFD5XX power requirements. Also reference
FAA AC 43.13-2B Paragraph 208 for more information on performing an aircraft electrical
load analysis.
The purpose of the ELA is to show compliance to 14 CFR §23.1351 and §23.1353 (h).
4.11 Low Power Behaviors
The IFD5XX can accept input power ranging from 9VDC to 33VDC but has the following low
power behaviors.
Input Voltage Level
Behavior
18VDC
High power USB charging (dedicated charging port
drawing 2.1A).
18VDC
USB port drops from High power USB charging to Low
power USB charging (dedicated charging port drawing
1.0A).
12.75VDC
USB port is turned off (no charging available).
11.5VDC
Bezel and LCD display dimmed down to 25% and a yellow
“Low Volts” CAS message is presented.
9VDC
Start a 60 second power down sequence and a red “Low
Volts Off in <x> sec” CAS message is presented. With 5
seconds to go until power down, the full power down
message is overlaid in the middle of the display.
Table 22: IFD5XX Low Power Behavior
Summary of Contents for IFD540
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