EFD1000 E5 Dual Electronic Flight Instrument (EFI) Install Manual
DOCUMENT # 900-00041-001
PAGE 111-226
REVISION D
© Copyright 2019 Aspen Avionics Inc.
Figure 9-13: KLN-90/A/B RS-232 and Analog to ACU Interface
Over Braid or
Double Shield
P3
19
7
ACU
GPS +TO
/FCS-LOC
/OBS-LEG
/APPR ACTIVE
OBS COS +
OBS COS -
1
13
KLN-90/A/B
6
18
20
8
37
27
26
31
P2
6
24
7
17
33
P1
11
4
5
13
6
15
25
22
OBS SIN -
OBS SIN +
ROTOR (H)
ROTOR (C)
APPR ACTIVE
FCS LOC /ENG
RS-232 OUT
OBS RESOLVER COS
OBS RESOLVER OUT
AC GROUND
OBS RESOLVER SIN
+TO
+FROM
NAV FLG +
D-BAR +RT
D-BAR +LT/NAV FLG-
GPS +UP
GPS +RT
GPS +LT
GPS LAT FLG +
GPS LAT FLG -
P901
19
20
21
1
8
12
7
14
GPS +DN
GPS Vert FLG +
GPS +FR
GPS Vert FLG -
N/C
17
/GPS MODE SEL
Over shield or over braid required
on this wire bundle to comply with
HIRF & Lightning. Extend within
back shell. Ground at both ends.
1
2
16
Existing
OBS/LEG
switch
N/C
N/C
N/C
/OBS-LEG
3
2
3
4
If existing installation has external
OBS/LEG switch then splice as
shown.
KLN-90B ONLY. These pins are
not connected on KLN-90 and
KLN90A units.
NO
NC
K1
ACFT PWR
GPS DISPLAYED
5
GPS selected on PFD requires
open to GPS. NAV1 or NAV2
selected on PFD requires ground to
GPS. Use 14V or 28V SPDT relay
for K1, P/N M5757/10.
ARINC 429 is the preferred connection, see Figure 9-10
RS232 does not support GPSS
Refer to manufacturers’
documentation to verify the
integration data and for information
regarding checkout procedures. This
drawing, as it pertains to the non-
Aspen equipment, is for reference
only.
Pin 8 may be used provided the
interface does not include XM Wx
6
EFD1000
9 (8)
RS232 IN PORT 2 (1)
4
Optionally a twisted pair (22TG2V64)
may be used with the second
conductor grounded at both ends.
6
7
5
