Remote Power Control; Tc978 Controller Interface; Configurable Serial Interfaces - FreeFlight ADS-B FDL-DB Dual Band Series Installation Information

Name
TX UAT Transmit (GREEN)
RX UAT Receive (GREEN)

2.5.4 Remote Power Control

The REM ON pin (J1-44) 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 (J1-44). 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-DB-XVR interfaces when installed:
•
System ON/OFF remote power control, REM ON (J1-44)
•
Low voltage +7 VDC power (J1-24 & J1-2)
•
Serial Port 3 RS-485 communication (J1-26 & J1-27)
The TC978 uses Serial Port 3 so when it is installed, the Serial Port 3 RS-232 pins (J1-24 & J1-
29) must not be connected to other equipment (Display, etc.).
The TC978 Controller interface connections are as follows:
PIN SIGNAL
J1-24 Vcp
J1-2 GND
J1-44 REM ON
J1-26 TRxD3+
J1-27 TRxD3-
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 up to twelve configurable Serial Interfaces available on the FDL-DB Dual Band
Series. All FDL-DB Dual Band models have six UART style Serial Port Interfaces (Ports 1, 2, 3,
4, 5, and 6) and ARINC capable FDL-DB Dual Band models have four ARINC 429 Input
FFS Copyright © 2020 All rights reserved.
Blink ON Blinks ON when ADS-B data is transmitted (once per second)
OFF No UAT transmissions
Blink ON Blinks ON when ADS-B data is received
OFF No UAT receptions
Controller Interface
ELECTRICAL I/O DESCRIPTION
+7 VDC O TC978 Controller Power Output
Ground Gnd TC978 Controller Power Return
Open/Ground I Remote Power Control (Ground: ON, Open: OFF)
RS-485 I/O Serial Channel 3 RS-485 Data+
RS-485 I/O Serial Channel 3 RS-485 Data-
ADS-B FDL-DB Dual Band Series
Document No. 88552 Rev A
Description
Installation Manual
2-21