Connector Pinout Information190-01499-02 GTX 3X5 Transponder TSO Installation ManualRev. 9 Page 5-25.1 Main Board Connector - J3251Table 5-1 J3251 ConnectorPin Pin Name I/O1 ALT ENCODER/CONFIG MODULE CLOCK I/O2 USB DATA HI I/O3 TEMP PROBE IN I4 TIME MARK A O5 ARINC 429 OUT A O6 ARINC 429 OUT B O7 RS-232 OUT 3 O8 RS-232 OUT 2 O9 RS-232 OUT 1 O10 ALTITUDE A1* or CONFIGURABLE* I11 ALTITUDE B1* or CONFIGURABLE* I12 ALTITUDE C1* or CONFIGURABLE* I13 ALTITUDE D4* or CONFIGURABLE* I14 EXTERNAL STANDBY SELECT* or CONFIGURABLE* I15 CONFIGURABLE DISCRETE 1* I/O16 CONFIGURABLE DISCRETE 2* I/O17 XPDR FAIL 1* or CONFIGURABLE* O18 EXTERNAL SUPPRESSION I/OI/OC4B1 A1IB AO C1I/O+ H I/OB2 A2I R BD4C2O+ L2142Ext Ident Input (7)Air / Ground Input (8)Ext Standby Input (6)Lighting BusExt Suppression BusSwitched Power OutPower ConfigReservedAltitude GrayCode InputPower Input 1Power GroundATA D-GroundRS-232 #3Discrete I/O 1 (1)OAT Temp ProbeRS-232 #2Keep Alive+ + I I I62 B4 A4I B APressure Sensor/Config Module22431D+IOI CITOI DV+TRVUSBRS-232 #1BAudio Mute Input (9)Discrete Input (10) Discrete I/O 2 (2)Power Input 2Power ControlDiscrete Output (3)RTime Mark AARINC 429 TXARINC 429 RX2Audio OutputARINC 429 RX1Numbers in ( ) are the discrete I/O numbers.VIEW IS LOOKING AT THE BACKOF THE UNIT
