ADS-B FDL-DB Dual Band Series
Installation Manual
Document No. 88552 Rev A
2-30
FFS Copyright © 2020 All rights reserved.
2.5.11
Audio Interface (Future Release)
Future growth to support output of traffic alerting audio functionality.
Audio Output
PIN
SIGNAL
ELECTRICAL
I/O
DESCRIPTION
J1-61
Audio +
Audio
O
Audio + Output
J1-62
Audio -
Audio
O
Audio - Output
2.6
TC978 Controller Electrical Connections
2.6.1 TC978 Interface
– DB-9 Pinout
TC978 Connections (DB-9)
PIN
SIGNAL
ELECTRICAL
I/O
DESCRIPTION
1
GND
Ground
Gnd
Signal Common
2
TMAPA
RS-485
I/O
Controller Serial Bus (+)
3
TMAPB
RS-485
I/O
Controller Serial Bus (-)
4
ALT_OUT
RS-232
O
Pressure Altitude Out
5
Reserved
-
-
-
6
GND
Ground
Gnd
Signal Common
7
REM ON
Open/Gnd
O
Remote Power Control (Ground: ON, Open:
OFF)
8
POWER
6
– 10 VDC
Pwr
Controller Power
9
GND
Ground
Gnd
Controller Power Common
2.7
TC978 Controller Interface Details
2.7.1 Power
Do NOT connect to aircraft input power.
The TC978 uses 5.5
– 10 volts from the FDL-DB-XVR (typically ~7 volts).
2.7.2 Remote ON
The Remote ON output controls the power to the FDL-DB-XVR. This is connected to the REM
ON input (J1-32) to remotely control power to both units.
2.7.3 TMAP Bus
TMAP is a proprietary protocol using RS-485 bi-directional serial bus between the TC978 and
FDL-DB-XVR. The TC978 RS-485 lines (TMAPA and TMAPB) are connected to the FDL-DB-
XVR RS-485 lines (TRxD3+ and TRxD3-) respectively.