Garmin Apollo CNX80, Installation Manual

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Installation Procedures
Apollo CNX80 Installation Manual 560-0982-00 Rev D
2-33
The CNX80 can communicate with an SL70 or SL70R transponder using the RS232 RxD6 and TxD6
lines, allowing the CNX80 to control the operation of the transponder. This interface will also allow
altitude to be provided from the SL70/70R to the CNX80. RS232 channel 6 is opto-isolated, allowing the
transmit lines of two CNX80’s to be connected together to either CNX80 to control an SL70 transponder.
A dedicated altitude encoder may be used to provide altitude data to the CNX80 using RS232 RxD8.
The CNX80 can provide DME tuning data to the DB30 using a reserved transmit port. This reserved
output cannot be configured.
Refer to section 3.2.1.1 for a list of available serial port configurations, and information on configuring the
serial ports.
2.8.10.2 ARINC 429
The CNX80 provides three ARINC 429 inputs and two ARINC 429 outputs. Each of these may be
configured for low-speed or high-speed operation.
2.8.10.2.1 ARINC 429 Inputs
P5-7 429 IN 1A
P5-27 429 IN 1B
P5-8
429 IN 2A
P5-28 429 IN 2B
P5-9
429 IN 3A
P5-29 429 IN 3B
The CNX80 can receive air data, heading data and wind data from suitable equipment. The labels that are
used by the CNX80 are listed in the table below.
Table 2-9 - ARINC 429 Input Labels
Label No. Parameter Name Typical Source
203 Pressure Altitude ADC
204 Baro Corrected Altitude ADC
210 True Airspeed ADC
212 Pressure Altitude Rate ADC
314 Heading (True) AHRS/IRU/NMC
315 Wind Speed FADC/NMC
316 Wind Direction (True) FADC/NMC
320 Heading (Magnetic) AHRS/IRU/NMC
Refer to section 3.2.1.2 for information on configuring the ARINC 429 inputs.
2.8.10.2.2 ARINC 429 Outputs
P5-4 429 OUT 1A
P5-24 429 OUT 1B
P5-5
429 OUT 2A
P5-25 429 OUT 2B