User's Manual

TT21/TT22 Transponder Installation Manual 13 July 2009
00560-00 Issue AF
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Page 14 Trig Avionics Limited
16
Reserved
-
17
External Standby In
Input
18
Mutual Suppression
Bidirectional
19
Squat Switch 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.
5.6 TT21/TT22 Transponder Interface Details
5.6.1 Power Input
The power supply can be 11-33 Volts DC; no voltage adjustment is required.
Use a 3 Amp circuit breaker for power supply protection to the TT21/TT22.
5.6.2 TMAP Bus
TMAP is a Trig proprietary bus based on RS485 signalling. It provides a bi-