GDR 66 Installation Manual Page iii190-00303-24 Revision ATABLE OF CONTENTSPARAGRAPH PAGESection 4 SYSTEM INTERCONNECTS......................................................... 4-14.1 Pin Function List ............................................................................................................. 4-14.1.1 P661 (COM)........................................................................................................................ 4-14.1.2 P662 (Main) ........................................................................................................................ 4-24.2 Power Functions.............................................................................................................. 4-44.2.1 Aircraft Power..................................................................................................................... 4-44.2.2 Remote Power Off .............................................................................................................. 4-44.2.3 GDR System ID Program ................................................................................................... 4-44.3 Serial Data....................................................................................................................... 4-54.3.1 RS-422 ................................................................................................................................ 4-54.3.2 RS-232 ................................................................................................................................ 4-54.3.3 ARINC 429 ......................................................................................................................... 4-64.4 Discrete I/O ..................................................................................................................... 4-74.4.1 Active Low Discrete Inputs ................................................................................................ 4-74.4.2 Key Event Out..................................................................................................................... 4-74.5 Audio............................................................................................................................... 4-84.5.1 Analog Audio...................................................................................................................... 4-84.5.2 ACARS/SELCAL ............................................................................................................... 4-9Appendix A Outline and Installation Drawings............................................. A-1Appendix B Interconnect Examples.................................................................B-1DRAFT