Audio Interface (Future Release); Tc978 Controller Electrical Connections; Tc978 Interface - Db-9 Pinout; Tc978 Controller Interface Details - FreeFlight ADS-B FDL-DB Dual Band Series Installation Information

ADS-B FDL-DB Dual Band Series
Installation Manual
Document No. 88552 Rev A
2.5.11

Audio Interface (Future Release)

Future growth to support output of traffic alerting audio functionality.
PIN SIGNAL
J1-61 Audio +
J1-62 Audio -
2.6

TC978 Controller Electrical Connections

2.6.1 TC978 Interface – DB-9 Pinout
PIN SIGNAL
1 GND
2 TMAPA
3 TMAPB
4 ALT_OUT
5 Reserved
6 GND
REM ON
7
8

POWER

9 GND
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.
2-30
Audio Output
ELECTRICAL I/O DESCRIPTION
Audio O Audio + Output
Audio O Audio - Output
TC978 Connections (DB-9)
ELECTRICAL I/O DESCRIPTION
Ground Gnd
RS-485 I/O
RS-485 I/O
RS-232 O
- -
Ground Gnd
Open/Gnd O
6 – 10 VDC
Pwr
Ground Gnd
Signal Common
Controller Serial Bus (+)
Controller Serial Bus (-)
Pressure Altitude Out
-
Signal Common
Remote Power Control (Ground: ON, Open:
OFF)
Controller Power
Controller Power Common
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