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System Interconnects
GDL 69/69A Installation Manual
Page 3-3
190-00355-02
Rev. F
3.2 GRT 10 Pin Out List
Table 3-2. GRT 10 Pin Out List
Pin #
Name
I/O
Notes
1 Reserved
--
2 RS-232
TxD
Out
3 RS-232
RxD
In
4 Signal
Ground
--
5 Reserved
--
6 Reserved
--
7 Power
Ground
--
8 Aircraft
Power
In
9 Volume
Lock*
In
* Indicates signals that are active low (ground to activate). On installation wiring diagrams, the more
traditional overline symbology is used.
3.3 GDL 69/69A Interface Descriptions
All connections to the GDL 69/69A are provided on the D-sub DB-78 connector labeled P691. The
antenna cable connection is provided on a TNC coaxial connector.
antenna cable connection is provided on a TNC coaxial connector.
Power
The GDL 69/69A will accept input power from 9 to 33 VDC. The two aircraft power inputs (Aircraft
Power 1, Aircraft Power 2) are intended to allow power to be provided by two different power busses.
Typically, both power input pins are connected on a single bus through a single circuit breaker. If power
is obtained from two different power busses, each leg should have its own circuit breaker.
Power 1, Aircraft Power 2) are intended to allow power to be provided by two different power busses.
Typically, both power input pins are connected on a single bus through a single circuit breaker. If power
is obtained from two different power busses, each leg should have its own circuit breaker.
P691-35
Aircraft Power 1 +
P691-37
Aircraft Power 2 +
P691-20 Power
Ground
P691-78 Power
Ground
Refer to Appendix D for recommended power connections.
Configuration
Module
The GDL 69/69A stores installation-specific configuration information in an aircraft configuration
module located in the DB-78’s backshell. This eliminates the need to set up aircraft specific
configuration items again if a new GDL 69/69A is installed. Since configuration module input pins
contain no lightning protection, the configuration module must be mounted within the connector
backshell as described in Section 2.5.2.2.
module located in the DB-78’s backshell. This eliminates the need to set up aircraft specific
configuration items again if a new GDL 69/69A is installed. Since configuration module input pins
contain no lightning protection, the configuration module must be mounted within the connector
backshell as described in Section 2.5.2.2.
P691-1
Configuration Module Ground
P691-21
Configuration Module Power (from GDL 69/69A)
P691-40
Configuration Module Data (bi-directional)
P691-60
Configuration Module Clock (from GDL 69/69A)
Refer to Appendix D for interconnect information.
The configuration module is not used when installed with GDU 104x series units. The configuration
module does not store XM Satellite Radio subscription information. When a new GDL 69/69A is
module does not store XM Satellite Radio subscription information. When a new GDL 69/69A is