190-01499-02
GTX 3X5 Transponder TSO Installation Manual
Rev. 4
Page 5-9
5.7
Serial Data Interfaces
5.7.1
RS-232
The RS-232 outputs are compatible with EIA Standard RS-232C with an output voltage swing of at least
± 5 V when driving a standard RS-232 load. The RS-232 inputs and outputs can be configured for different
functions depending on the installation. Refer to section 6.5. Pins P3252-5, -10, and -15 are on the GTX
345 only.
Table 5-9 RS-232 Inputs and Outputs
5.7.2
ARINC 429
The ARINC 429 output conforms to the ARINC 429 electrical specification when loaded with up to five
standard ARINC 429 receivers. The ARINC 429 inputs and outputs can be configured for different
functions depending on the installation. Refer to section 6.5.
Table 5-10 ARINC 429 Inputs and Outputs
Pin Name
Connector
Pin
I/O
RS-232 OUT 1
P3251
9
O
RS-232 IN 1
P3251
31
I
RS-232 GND 1
P3251
52
O
RS-232 OUT 2
P3251
8
O
RS-232 IN 2
P3251
30
I
RS-232 GND 2
P3251
51
--
RS-232 OUT 3
P3251
7
O
RS-232 IN 3
P3251
29
I
RS-232 GND 3
P3251
50
---
RS-232 OUT 4
P3252
5
O
RS-232 IN 4
P3252
10
I
RS-232 GND 4
P3252
15
O
Pin Name
Connector
Pin
I/O
ARINC 429 OUT A
P3251
5
O
ARINC 429 OUT B
P3251
6
O
ARINC 429 IN 1A
P3251
27
I
ARINC 429 IN 1B
P3251
28
I
ARINC 429 IN 2A
P3251
48
I
ARINC 429 IN 2B
P3251
49
I