Garmin Apollo CNX80 Installation Manual

Also see for Apollo CNX80: User Newsletter User Newsletter Supplemental Flight manual Pilot's guide Data list

Installation Procedures2-4 560-0982-00 Rev D Apollo CNX80 Installation Manualnot meet the acceptable field-of-view requirement above but have been evaluated by the FAA anddetermined to be acceptable.NOTEIf the CNX80 installation is outside the acceptable field-of-view and the aircraft type is notlisted in Appendix E it does not mean that the installation is unacceptable – the FAA hasnot yet evaluated it. The installation can be completed and the aircraft returned to servicepending an FAA evaluation of the installation, provided it is placarded “GPS LIMITEDTO VFR USE ONLY” in clear view of the pilot. IFR VOR/LOC/GS operations are stillpermitted in this instance.Contact Garmin AT for guidance on how to proceed in this case.2.5.2 E XISTING S ENSORSWhen the CNX80 is installed with external sensors, these sensors must be installed in accordance with themanufacturer's data. This manual does not provide information for the installation of specific externalsensors.The CNX80 can accept data from multiple altitude, heading, and baro correction sources. If multiplesources are used, the CNX80 will accept data as described below.2.5.2.1 Multiple Altitude SourcesThe CNX80 can accept altitude from an RS232 altitude encoder, fuel/air data computer (FADC), ARINC429 air data computer (ADC), an SL70/SL70R transponder, and another CNX80.If multiple sources of altitude data are supplied to the CNX80, only valid data from the highest prioritysource is used (input priority cannot be configured). If the highest priority source becomes unavailable,data is taken from the next-highest priority source. The priorities of the altitude sources are as follows(from highest to lowest):1. ARINC 429 ADC2. FADC3. RS232 Altitude EncoderNOTEAlthough the CNX80 can be configured to accept data from an RS232 altitude encoder ondifferent ports, the CNX80 cannot accept data from two RS232 altitude encoders.4. SL70/SL70R Transponder that receives Gray code altitudeNOTEAltitude data received from a second CNX80 will also be derived from one of the abovesources. Data received on the CNX80 cross-talk input is treated as if it is received directlyfrom the source that is supplying altitude to the second CNX80. If the direct input and theCNX80 cross-talk input have the same priority, data from the direct input is used.2.5.2.2 Multiple Heading SourcesThe CNX80 can accept heading from an ARINC 429 Heading Source, an FADC or an XYZ synchrosource.