User's Manual

SYSTEM DESCRIPTION AND INSTALLATION MANUAL
TCAS 3000 Traffic Alert and Collision Avoidance System
34−43−23
Use or disclosure of information on this page is subject to the restrictions in the proprietary notice of this document.
Page 4−28
15 Dec 2005
Table 4−4. Gables Control Panel Interface Descriptions
Connector Pin
Designation
Functional Description
J1−1,2 PANEL AND DISPLAY LIGHTING INPUT: (J1−1 HIGH, J1−2 LOW)
5 V ac, 2.3 Amp maximum lighting input for front panel and display lighting. Lighting is
provided by incandescent lamps.
J1/J2−3, 4 +28 V dc INPUT POWER: (J1/J2−3 HIGH, J1/J2−4 LOW)
The control panel is powered from a +28 V dc power bus. Two identical but isolated
power supplies provide the power requirements to each individual electronic module that
independently control transponder 1 and 2. Maximum current is 2.5 Amps dc.
J1/J2−5 ANTENNA TRANSFER DISCRETE OUTPUT: (J1/J2−5)
This discrete output is used to provide the ability to switch a RF relay for dual transponder
installations that have only one set of antennas. These outputs from J1 and J2 are linked
to the XPNDR 1−2 switch. The output is OPEN when the transponder is in standby
(inactive) mode, and GROUND when the transponder is in an active operational mode.
J1/J2−6 DC GROUND INPUT: (J1/J2−6)
Reference for all discrete inputs/outputs. Tied to aircraft dc ground.
J1/J2−7 STANDBY/ON OUTPUT: (J1/J2−7)
These discrete outputs (STANDBY/ON) will mimic the XPNDR switch position placing one
transponder in Standby and the other in the ON (active) mode. Both transponders will
never be in the ON mode simultaneously. This output is (GROUND) when in Standby
mode and OPEN when in the ON mode. This output can sink 100 mA maximum.
Connect pin to transponder STANDBY / ON Discrete Input.
J1/J2−8 CHASSIS GROUND INPUT: (J1/J2−8)
Tied to airframe. Also used to connect ARINC 429 cable shields to the chassis.
J1/J2−9 FUNCTIONAL TEST INPUT: (J1/J2−9)
Functional test can also be initiated using this input discrete. When J1/J2−9 is grounded,
a functional test similar to pushing the TEST button on the front panel is done.
J1/J2−10 WARNING AND CAUTION OUTPUT: (J1/J2−10)
This discrete output provides a low signal to a remote master warning system when the
control panel receives a Monitor Lamp fault indication from the active transponder.
Otherwise it provides 7 to 30 V dc or a resistance of >100K ohms to ground. This output
can sink 20 mA maximum.
J1/J2−12 TRANSPONDER FAIL #2 INPUT: (J1/J2−12)
The G7130−XX ATC/TCAS control panel transponder fail annunciator is controlled by this
input. When the transponder is operating normally this input remains grounded.
Otherwise, the transponder opens this input to indicate a transponder failure. The control
panel turns the annunciator ON to alert the user of a transponder malfunction. The
transponder fail annunciator turns on only when the failed transponder is selected by the
XPNDR 1−2 switch.
Connect this pin to the transponder XPDR FAIL #2 Discrete Output.