S A N D E L 3 5 0 0 E H S I P3 P1 S A N D E L 3 5 0 0 E H S I EHSI 2

S A N D E L 3 5 0 0 E H S I P3 P1 S A N D E L 3 5 0 0 E H S I EHSI 2
EHSI 2 RHS
EHSI 1 LHS
32-POLE CIRCULAR CONNECTOR
J1
CB?
+28V
P3
CB?
1
9
G
H
5A
From Radio Master relay
P3
AIRCRAFT PWR
AIRCRAFT PWR
+28V
5A
1
9
AIRCRAFT PWR
AIRCRAFT PWR
3
11
AIRCRAFT GND
AIRCRAFT GND
2
10
4
12
5
13
6
14
7
15
8
GPS/OBS HOLD
GPS APPR/ARM
GPS1 RELAY SENSE/SEL
GPS2 RELAY SENSE
NAV2 RELAY SENSE
NVIS CTRL
ANALOG DME VAL/REV CTRL
FCS BACK COURSE
GPS1 RELAY
GPS2 RELAY
NAV2 RELAY
10
APPR ARM OUT
BUS3
BUS2
J
K
From Radio Master relay
GPS/NAV switching (connect to GND to select GPS)
Pin 10 of A92 relay (pin 44 of A92=GND)
L
S?
RS232 from WX-500
a
J3/20
REV AI
DC SIN
DC COS
+4.5V SIN/COS REF
A
B
D
S
KR-87 ADF
Z
Y
F
3
11
AIRCRAFT GND
AIRCRAFT GND
2
10
4
12
5
13
6
14
7
15
8
GPS/OBS HOLD
GPS APPR/ARM
GPS1 RELAY SENSE/SEL
GPS2 RELAY SENSE
NAV2 RELAY SENSE
NVIS CTRL
ANALOG DME VAL/REV CTRL
FCS BACK COURSE
GPS1 RELAY
GPS2 RELAY
NAV2 RELAY
S?
REV AI
R?
10K
10
APPR ARM OUT
b
D?
KLN-94
p891
/MSG
/APR
/TERM
/WPT ALERT
16
18
17
15
RS232 TX
2
X
W
D
E
29
14
44
43
LRN
LRN
LRN
LRN
MSG IN
APPR IN
APPR ARM IN
WPT IN
A
T
S
21
35
12
27
41
WX RS232 RX
WX RS232 GND
OM
MM
IM
26
40
EXT DSP BRT CTRL
DME1/NAV1
8
38
24
9
+RIGHT
+LEFT
+TO
+FROM
37
23
NAV FLAG+
NAV FLAG-
1
SIGNAL GND
36
6
22
7
GS
GS
GS
GS
19
GYRO VALID
16
400HZ REF
3
33
ARINC429 A
ARINC429 B
31
17
ARINC429 A
ARINC429 B
4
34
20
ADF DC SIN
ADF DC COS
ADF DC REF
KLN94 GPS data
Marker Beacons
from PMA7000
(needs 470R pulldowns)
Not connected due to access difficulty
LIGHT +28V
+RIGHT
+LEFT
+TO
+FROM
These signals are accessible
on the annunciator lamp cluster
(except the GPS data)
KI-525 P1
UPPER
FEMALE PINS
ON PLUG
Connections
on back of
K
F
c
j
n
k
CRS ERROR
HDG ERROR
HDG/CRS REF
e
P
S
GS FLAG-
W
NAV2
GS >>
EHSI2 GS RELAY
28V
KI-525 P2
1N4001
LOWER
MALE PINS
ON PLUG
J
H
k
m
V
K
Use
both
GND
pins
b
V
Z
T
+NAV FLAG
-NAV FLAG
NAV FLAG GND
SIGNAL GND
DIGITAL GND
POWER GND
KI204
Instrument dimming bus
N
P1
13
25
12
24
11
23
10
22
9
21
8
20
7
19
6
18
5
17
4
16
3
15
2
14
1
GS FLG GS FLG +
GS DEV UP
GS DEV DN
GND
ILS ENER
GS FLAG+
GS DEV +UP
GS DEV +DN
J
E
B
HDG VALID
RESOLVER H
RESOLVER D
RESOLVER E
RESOLVER G
HDG CT C
HDG CT Z
P
X
V
Y
e
u
t
200R
1k
whi
(not used)
blk
GYRO VALID
<<< Autopilot CP
<<< Autopilot HDG
Used
in GPS
mode
only
whi
blk
whi
blk
1k
whi
whi/ora
whi/blu
3
5
0
0
P1
29
14
44
43
LRN
LRN
LRN
LRN
21
35
12
27
41
WX RS232 RX
WX RS232 GND
OM
MM
IM
26
40
EXT DSP BRT CTRL
DME1/NAV1
whi
blk
whi
blk
8
38
24
9
+RIGHT
+LEFT
+TO
+FROM
whi
blk
37
23
NAV FLAG+
NAV FLAG-
1
SIGNAL GND
36
6
22
7
GS
GS
GS
GS
19
GYRO VALID
E
H
S
I
FLAGFLAG+
DEV +DOWN
DEV +UP
GND
1k
S
A
N
D
E
L
whi
blk
whi
blk
Connected via shields
NAV1 GS
MSG IN
APPR IN
APPR ARM IN
WPT IN
S
A
N
D
E
L
Used
in GPS
mode
only
3
5
0
0
E
H
S
I
FLAGFLAG+
DEV +DOWN
DEV +UP
16
400HZ REF
Heading
whi
blk
3
33
ARINC429 A
ARINC429 B
Heading
TCAS
whi
blk
31
17
ARINC429 A
ARINC429 B
TCAS
4
34
20
ADF DC SIN
ADF DC COS
ADF DC REF
red
blu
FEMALE
red
blu
NAV2 GS
P2
8
15
7
14
6
13
5
12
4
11
3
10
2
9
1
1k
whi
blk
whi
blk
D?
3x1N4001
P1
All P1 shields go to P1 SIG GND
D?
EHSI 2
GLIDESLOPE
RELAY
CONNECTOR
P
R
SPARES
Disconnect these
two wires if
using ARINC429
GPS input
wh
wh/bl
ARINC429 HEADING >>>
ARINC429 TCAS >>>
CABLE SHIELD TO AIRFRAME
ARINC429 GPS >>>
(not used yet)
FEMALE
P2
8
15
7
14
6
13
5
12
4
11
3
10
2
9
1
P3
P2
NAV2 RELAY SENSE **
NAV2 RELAY DRIVE
EHSI #2 +28V
**GND wire reqd
for relay sense
5
9
4
8
3
7
2
6
1
A
B
A
B
A
B
40
26
23
8
38
37
COURSE DATUM
HDG DATUM
OBS ’H’
OBS SIN OUT
OBS COS OUT
OBS DC REF
1
SIGNAL GND
31
17
RS232 GND / ARINC429 A
RS232 RX /
ARINC429 B
blk
whi
3
35
COMPOSITE 1 IN
COMPOSITE 2 IN
whi
blk
18
ILS ENERGISE 1
6
36
22
7
DME
DME
DME
DME
DATA
CLOCK
REQ
1 HOLD
28
12
13
42
43
29
27
FCS
FCS
FCS
FCS
FCS
FCS
FCS
LAT DEV+
LAT FLAG+
VERT DEV+
VERT FLAG+
LAT SUPERFLAG
VER SUPERFLAG
ILS ENERG OUT
40
26
23
8
38
37
COURSE DATUM
HDG DATUM
OBS ’H’
OBS SIN OUT
OBS COS OUT
OBS DC REF
1
SIGNAL GND
31
17
RS232 GND / ARINC429 A
RS232 RX /
ARINC429 B
3
35
COMPOSITE 1 IN
COMPOSITE 2 IN
18
19
ILS ENERGISE 1
ILS ENERGISE 2
6
36
22
7
DME
DME
DME
DME
NAV1/NAV2 GS
whi
blk
whi
blk
whi
whi
blk
MALE
B
P2
Connected via shields
RS232 GPS >>>
From Pin 46 A92 relay
"CA206"
KDI-572 DME
GND
49
11
12
15
2
40
U
ILS ENERGISE 1
N
f
j
g
h
red
blu
red
blu
V
NAV1 Composite
From J75M(f) KN72/6 RN208F
c
NAV2 Composite
From NAV2 receiver
(can come from Y of KI204)
M
whi
blk
P4
FCS OUTPUTS
C
5
9
4
8
3
7
2
6
1
FEMALE
whi
blk
whi
blk
DATA
CLOCK
REQ
1 HOLD
All P1 shields go to P1 SIG GND
All P2 shields go to P2 SIG GND
All P1 shields go to P1 SIG GND
All P2 shields go to P2 SIG GND
d
e
NOTES
EHSI1 is in Slave mode - GPS1 NAV1 (NAV2 is RMI mode only) and NAV/GPS switching is external
EHSI2 is in Master mode - GPS1 NAV1 NAV2
3500 version must be v4.03+ to support display dimming, v4.05+ for roll steering (needs a key)
All grounds airframe grounds unless shown otherwise
Original KI-525 was 066-3046-07 30/400Hz 14/28V
Title
SANDEL 3500 X2 - SOCATA TB20GT
Size Document Number
REV
C
Date:
B
February 20, 2014 Sheet
1 of
1
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