ADS-B FDL-978 Series and
Lite Series Installation Manual
Document No. 87343 Rev G
2-8
FFS Copyright © 2016 All rights reserved.
Name
Description
TX
UAT Transmit (GREEN)
Blink ON Blinks ON when ADS-B data is transmitted (once per second)
OFF No UAT transmissions
RX
UAT Receive (GREEN)
Blink ON Blinks ON when ADS-B data is received
OFF No UAT receptions
2.5.4 Remote Power Control
The REM ON pin (J1-32) MUST be connected to ground when not using remote
power control or a TC978 is not installed for the system to power on.
System ON/OFF power is remotely controlled using the REM ON pin (J1-32). The system will
power on when REM ON is grounded and power off when REM ON is open.
2.5.5 TC978 Controller Interface
The TC978 Controller uses the following FDL-978-XVR interfaces when installed:
System ON/OFF remote power control, REM ON (J1-32)
Low v7 VDC power (J1-18 & J1-2)
Serial Port 3 RS-485 communication (J1-20 & J1-28)
The TC978 uses Serial Port 3 so when it is installed, the Serial Port 3 RS-232 pins (J1-23 & J1-
24) must not be connected to other equipment (Display, etc.).
The TC978 Controller interface connections are as follows:
Controller Interface
PIN
SIGNAL
ELECTRICAL
I/O
DESCRIPTION
J1-18
Vcp
+7 VDC
O
TC978 Controller Power Output
J1-2
GND
Ground
Gnd
TC978 Controller Power Return
J1-32
REM ON
Open/Ground
I
Remote Power Control (Ground: ON, Open: OFF)
J1-20
TRxD3+
RS-485
I/O
Serial Channel 3 RS-485 Data+
J1-21
TRxD3-
RS-485
I/O
Serial Channel 3 RS-485 Data-
Do NOT connect Serial Port 3 RS-232 pins to other devices (Display, etc.) when
the TC978 Controller is installed.
2.5.6 Configurable Serial Interfaces
There are nine configurable Serial Interfaces available on the FDL-978 Series: Six UART style
Serial Port Interfaces (Ports 1, 2, 3, 4, 5, and 6), two ARINC 429 Input Interfaces (429 IN1 and
429 IN2), and one ARINC 429 Output Interface (429 OUT1).