User's Manual

TT21 Transponder Installation Manual 19 January 2009
00560-00 Issue AA
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provided.
5.5 TT21 Transponder Electrical Connections
The TT21 has a single 25 way female socket which provides the data and power inputs to the
transponder. A single TNC coaxial connector attaches to the antenna.
5.5.1 TT21 Interface – Pinout
Pin Signal Direction
1
Ground -
2
TMAP1A Bidirectional
3
TMAP1B Bidirectional
4
Ground -
5
GPS Position In Input
6
Ground -
7
RS232 Out Output
8
TMAP2A Bidirectional
9
TMAP2B Bidirectional
10
Ground -
11
Controller Power Output
12
Ground -
13
Power ON Input
14
Ground -
15
11-33V DC Input
16
Reserved -
17
Squat Switch In Input
18
Mutual Suppression Bidirectional
19
External Standby In Input
20
Ident Switch In Input
21
Reserved -
22
Reserved -
23
Reserved -
24
Reserved -
25
Reserved -
The following diagram shows the connector orientation as viewed from the wiring side.
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