To Rs-485/-422 Serial Converters; Arinc 429 Ports; Figure 4: Fdc-485/422 Serial Converter; Fdl-Db Dual Bands - FreeFlight ADS-B FDL-DB Dual Band Series Installation Information

PIN SIGNAL
J1-50* TxD6-**
2.5.6.1.1 RS-232 to RS-485/-422 Serial Converters
Some installations may require more RS-485/-422 serial interfaces than are available on the
FDL-DB Dual Band Series. For these installations, serial converters are available that can be
installed inline between the devices.
The FreeFlight Data Converters are used to convert an RS-232 port to RS-485 or RS-422. A
female DB-9 connects the converter to the FDL-DB Series wiring harness, while a male DB-9 is
connected to the other device.
The FDC-485 can be used on the FDL-DB serial port 6 only when configured for RS-232
interface, using pins J1-50 and J1-8. The FDC-422 can be used on any FDL-DB serial port
configured for RS-232.

2.5.6.2 ARINC 429 Ports

Four ARINC 429 Input Serial Interfaces are available on ARINC capable FDL-DB Dual Band
models. The ARINC 429 Input channels are 429 IN 1, 429 IN 2, 429 IN 3, and 429 IN 4. The
ARINC capable FDL-DB Dual Band models have two ARINC 429 Outputs which are 429 OUT 1
and 429 OUT 2. The ARINC channels can be software configured for various label interfaces
and as either high-speed or low-speed.
Some ARINC functionality is available through a separate unit upgrade made
available at the time of installation.
Refer to SECTION 5 for additional detailed information about serial and ARINC
port configuration.
The ARINC 429 Serial Interface pin connections are as follows:
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Serial Channels
ELECTRICAL I/O DESCRIPTION
RS-422/RS-
232 I Serial Port 6 Data Out-

Figure 4: FDC-485/422 Serial Converter

ADS-B FDL-DB Dual Band Series
Installation Manual
Document No. 88552 Rev A
2-23