190-01182-02 GTR 225/GNC 255 TSO Installation Manual
Rev. F Page D-24
NOTES
Figure D-14 GNC - GDU 620 Interconnect
ALL WIRES 24 AWG OR LARGER UNLESS OTHERWISE SPECIFIED.
GROUND DESIGNATION: SHIELD BLOCK GROUND
AT GNC, CONNECT SHIELD GROUNDS TO THE CONNECTOR BACKSHELL – THE SHIELD TERMINATION
LEADS SHOULD BE LESS THAN 3.0". CONNECT OTHER END OF THE SHIELD PER THE REMOTE
EQUIPMENT INSTALLATION REQUIREMENTS.
REFER TO GDU 620 INSTALLATION MANUAL FOR COMPLETE PINOUT AND INTERCONNECT INFORMATION.
SELECTED COURSE INPUT TO THE GNC IS NOT PROVIDED BY THE GDU 620 IN THIS CONFIGURATION.
CONFIGURE THE GNC CDI INDICATOR TYPE TO “NONE.” THE GNC WILL SEND NAVIGATION DATA TO THE
GDU 620 OVER ARINC 429, WHICH ALLOWS THE GNC RS-232 INPUT TO BE USED FOR A GPS SOURCE.
SEE FIGURE D-15 FOR GPS SOURCE INTERCONNECT DETAILS.
REFER TO GDU 620 INSTALLATION MANUAL, FOR NAV INPUT OPTIONS AND CONFIGURATION.
CONFIGURE THE GDU 620 TO USE AN ARINC 429 NAV RADIO, SUCH AS GNS 430W. ANY AVAILABLE ARINC
429 PORTS MAY BE USED ON THE GDU 620.
CONFIGURE ARINC 429 TX TO LO SPEED AND SDI TO VOR/ILS 1 OR VOR/ILS 2 (TO MATCH NAV 1 OR NAV 2
INPUT ON GDU 620).
P2001
GNC
GARMIN GDU 620
s
s
RS-232 GROUND
RS-232 GND 31
P2002
24
s
ARINC 429 OUT A
ARINC 429 OUT B 23
7
24
ARINC 429 IN 4A
ARINC 429 IN 4B
P6202
16
RS-232 IN
RS-232 OUT
GPS SOURCE
6
s
7
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