TT31 Transponder Installation Manual
8 May 2017
00455-00
Issue AQ
______________________
Page 36
Trig Avionics Limited
Ground
Lighting 14V
Lighting 28V
Suppress I/O
Squat Switch
Ext Standby
11-33V DC
11-33V DC
Ground
Ext Ident
Alt D4
Alt B4
Alt B2
Alt C1
Alt B1
Alt C4
Alt A4
Alt A2
Alt C2
Alt A1
RS232 Out 1
RS232 In 1
Suppress In
Ground
Altitude Alert
RS232 Out 2
RS232 In 2
ARINC Traffic B
ARINC Traffic A
Audio +
Audio -
Audio Mute
Antenna Connection
RF
1
2
3
4
5
10
11
12
A
F
8
B
C
D
E
H
J
K
L
M
6
7
9
1
6
2
3
E
F
B
C
5
Coax
GPS POSITION SOURCE
Altitude In
MUTUAL
SUPPRESSION
BUS
PARALLEL
ALTITUDE
ENCODER
3A
CIRCUIT BREAKER
11
–
33v aircraft power
1
OTHER TRANSPONDER
1A
Circuit Breaker
3
LAMP
4
11
–
33V
Primary
TRIG TT31
Secondary
SERIAL ALTITUDE ENCODER
or
ADC
Altitude Out
2
1
DME
Suppression Out
AUDIO PANEL
Audio +
Audio -
A
LL WIRES SHOULD BE
18
–
24
AWG
NOTES:
1.
C
ONNECT ONLY ONE INPUT TO THE LIGHTING BUS
,
DEPENDING ON LINE VOLTAGE
1
2
O
NLY CONNECT ONE ALTITUDE DATA SOURCE
,
EITHER A SERIAL ENCODER
,
PARALLEL
ENCODER OR
ADC.
W
HEN USING DATA FROM AN
ADC,
IT SHOULD BE CONNECTED TO THE
“
SERIAL ALT IN
”,
AS
SHOWN
.
3
L
AMP SHOWN AS EXAMPLE OF POSSIBLE ALERTER INSTALLATION
.
O
THER OPTIONS ARE
POSSIBLE
.
4
5
5
6
6
T
HIS DIAGRAM ILLUSTRATES SERIAL ALTITUDE IN
/
OUT ON
RS232
P
ORT
1.
T
HIS CAN BE
CONFIGURED FOR
GPS
IN OR
TIS
OUT IF REQUIRED
.
RS232
P
ORT
2
COULD ALSO BE
USED
.
5
TIS
TRAFFIC OUTPUT TO A COMPATIBLE
ARINC
DISPLAY
.
7
7
D
ISCRETE INPUT FROM HIGHER PRIORITY AUDIO SOURCE
.
Figure 14-A Typical TT31 Interconnect