Garmin GTX 3X5 Installation Manual page 148

This section contains wiring interconnect details and examples for the connections necessary for the
installation of the GTX 33X and GTX 3X5 Series transponders.
Each figure contained in this section has notes that must be followed. These general notes apply to all of
the figures contained in this section.
 Unless specified differently, all wires are 24 AWG or larger.
 Power and ground connections are 22 AWG wire for run lengths less than 10 feet, if not, use 18
AWG.
 Use oversize contacts in the connector kit for wire sizes greater than 22 AWG.
 In 14 VDC installations, use two power pins and two ground pins for power and ground
connections.
 In 28 VDC installations, use only one wire for power and ground connections.

Antennas and associated cables are shown for reference only.
 In dual GTX transponder installations, each transponder must be grounded through separate
ground terminal/stud locations on the aircraft.
 If practical, power and ground wires should be routed separately for each transponder.
 Route grounds and wire separately to improve safety if there is a wiring or grounding system
failure.
 Designations for ground connections:
Shield Block Ground
S
 Shield ground terminations to the connector backshell must be 3.0 inches or less in length.
 Ground terminations of interfaced equipment can vary. Refer to the manufacturer's installation
manual for information.
 HDSB Ethernet wiring must use 24 AWG aircraft grade category 5 Ethernet cable:
 RS-232 and ARINC 429 ports shown are suggested port configurations.
 Installations can require alternate port configurations and are acceptable provided the equipment
interfaces and data formats are available on alternate ports.
190-01499-02
Rev. 4
Airframe Ground
Manufacturer
PIC Wire and Cable
Carlisle IT
P/N
10424
39204
GTX 3X5 Transponder TSO Installation Manual
Page D-2