190-01499-02 GTX 3x5 TSO Installation Manual
Rev. 1 Page 5-11
5.14 USB Interface
The USB interface is intended only for unit configuration, software updates, and service while the aircraft
is on the ground. It is not intended for use during normal operation or when airborne.
The USB cable shipped with the unit should be used and should not be lengthened. The USB cable should
also not be tied up in bundles with other electrical cables, particularly power cables, in the aircraft to avoid
potential damage or interference due to coupling with other cables.
Pin Name Connector Pin I/O
USB D+ P3251 2 I/O
USB D- P3251 24 I/O
USB V+ P3251 44 I
GROUND (USB ground) P3251 45 O
Pin Name Connector Pin I/O
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