Garmin GTX 330 Series Supplement GRT Avionics
Revision A GTX 330-4
Section 2: Installation & Wiring
2.1 Suggested Connections
For more information on Display Unit pins and connectors, see Connector Definitions (HX, SX) on
the GRT website or Pinout Diagrams in HXr Installation Manual.
2.2 Worksheet: My System
You may use this form to make a record of your own Serial Port IN and OUT choices.
Horizon HX and HXr EFIS
Display
Unit Pin
Display Unit
Function
GTX 330 Pin
GTX 330 Function
B22
Serial 7 OUT
P3301-22 (Serial 1 IN)**
Fuel air data in for encoder and
flight information
B23
Serial 7 IN
P3301-23 (Serial 1 OUT)**
Output of TIS traffic data
** Any GTX 330 serial port pair may be used.
** Multiple Serial ports can be used to connect multiple display units for redundancy
Display
Unit Pin
Display Unit Port
GTX 330 Pin
GTX 330 Port
Wire Color
Serial _____ OUT
P3301- _______
Serial _____ IN
Serial _____ IN
P3301- _______
Serial _____ OUT
Sport EFIS
Display
Unit Pin
Sport Display
Unit Function
GTX 330 Pin
GTX 330 Function
Sport Pin 31 Serial 2 OUT
P3301-22 (Serial 1 IN)**
Fuel air data in for encoder and flight
information
Sport Pin 35 Serial 2 IN
P3301-23 (serial 1 OUT)** Output of TIS traffic data
** Any GTX 330 serial port pair may be used.
** Multiple Serial ports can be used to connect multiple display units for redundancy
