ADS-B FDL-978 Series and
Lite Series Installation Manual
Document No. 87343 Rev G
2-10
FFS Copyright © 2016 All rights reserved.
2.5.6.2 ARINC 429 Ports
Two ARINC 429 Input Serial Interfaces are available on the FDL-978 Series. The ARINC 429
Input channels are 429 IN 1 and 429 IN 2. The FDL-978 Series has one ARINC 429 Output
which is 429 OUT 1. The ARINC channels can be software configured for various label
interfaces and as either high-speed or low-speed.
Refer to Section 3.3.2 for additional detailed information about serial and ARINC
port configuration.
The ARINC 429 Serial Interface pin connections are as follows:
ARINC 429 Channels
PIN
SIGNAL
ELECTRICAL
I/O
DESCRIPTION
J1-35 429 IN 1A
ARINC 429
I
ARINC 429 Input Port 1A
J1-34 429 IN 1B
ARINC 429
I
ARINC 429 Input Port 1B
J1-6 429 IN 2A
ARINC 429
I
ARINC 429 Input Port 2A
J1-36 429 IN 2B
ARINC 429
I
ARINC 429 Input Port 2B
J1-10 429 OUT 1A
ARINC 429
O
ARINC 429 Output Port 1A
J1-11 429 OUT 1B
ARINC 429
O
ARINC 429 Output Port 1B
2.5.7 Discrete Inputs
Input pins are pre-configured active low. See SECTION 9 for a wiring diagram
reference
Three discrete inputs are available to provide control inputs to the UAT. The discrete input
connection pins are as follows:
Discrete Inputs
PIN
SIGNAL
ELECTRICAL
I/O
DESCRIPTION
J1-27 AIR/GND
Open/Ground I
Air/Ground In (Squat Switch – configurable)
J1-15 TRAF TEST
Open/Ground I
Traffic Test
J1-12 ANONYMOUS
MODE
Open/Ground I
Anonymous Mode
