190-00906-01
GTX 23 Installation Manual
Rev. C
Page 4-3
4.1.2 Aircraft Power
Power input requirements are listed in the following tables. The power input pins accept 14/28 Vdc. Refer
to Figure C-1 and C-2 for power interconnections.
4.2 Discrete Functions
4.2.1 Discrete Outputs
External suppression should be connected if a DME or TCAS is installed in the aircraft avionics system.
The GTX 23 suppression I/O pulses may not be compatible with all models of DME or TCAS. Known
incompatible DME units include the Bendix/King KN 62, KN 64 and KNS 80. These models have an
output-only suppression port and can be damaged by the GTX 23 mutual suppression output. In this case,
do not connect the GTX 23’s suppression pin to the incompatible unit’s suppression pin; however, do
connect the GTX 23’s suppression pin to any other compatible unit’s suppression pin.
Table 4-2 Aircraft Power
Pin Name
Connector
Pin
I/O
AIRCRAFT POWER 1
P2301
21
In
AIRCRAFT POWER 1
P2301
42
In
AIRCRAFT POWER 2
P2301
56
In
AIRCRAFT POWER 2
P2301
60
In
POWER GROUND
P2301
39
--
POWER GROUND
P2301
58
--
Table 4-3 Discrete Outputs
Pin Name
Connector
Pin
I/O
EXTERNAL SUPPRESSION I/O (TXP/DME)
P2301
31
I/O
