EFD1000 E5 Dual Electronic Flight Instrument (EFI) Install Manual
DOCUMENT # 900-00041-001
PAGE 81-226
REVISION D
© Copyright 2019 Aspen Avionics Inc.
7.2.4
HIRF/Lightning Requirements
In order to meet HIRF and Lightning requirements it is required that the following cable
runs use either an over braid applied during fabrication or double shielded wires. The
over braid or double shield must extend within the back shell and must be grounded at
both ends.
All ARINC 429 and RS-232 wiring into or out of the EFD require either a double-
shielded wire, or a tinned copper over braid be applied over the twisted shielded
pair. See NOTE 1 on Wiring Diagrams 9-4 through 9-14.
The following wires require single shields to comply with HIRF and Lightning
requirements:
Aircraft power to the EFD requires a single stranded shielded wire from circuit
breaker to EFD. See Figure 9-1.
EFD to Configuration Module comes as an assembly with color coded wires and
uses an over braid over non-shielded single conductor wires.
EFD1000 E5 to RSM wiring does not require the over braid or double shield, only what is
specified in Section 7.2.6.
ACU to GPS, ACU to VLOC receiver, and ACU to autopilot require no additional shielding
just what is specified in the wiring diagrams of Section 9.
7.2.5
EFD to GPS/VLOC/ACU Wiring
Use tinned copper over braid or double-shielded wires on all ARINC 429 and RS-232
wires entering or exiting the EFD back shell. Ground the over braid and wire shields
within the back shell. If using double shielded wire it may be difficult to terminate all
shields within the back shell. If this is the case then use a piece of tinned copper over
braid that extends at least 6 inches outside the back shell to cover all unshielded wires
(see Figure 7-1).
Figure 7-1: EFD Back Shell Grounds
At the GPS/VLOC/ACU terminate the over braid within the back shell or as close as
possible. Ground the over braid at this end using a pigtail as short as possible. If using
Solder then
Heat Shrink as required
M27500-22TG2V64 or equivalent
6 inches
To all ARINC 429 and
RS-232 Sources
Tinned Copper Over
Braid
Internal Ground
Lug
Solder Splice or Solder
both shields
