User's Manual

Table Of Contents
SYSTEM DESCRIPTION AND INSTALLATION MANUAL
T
3
CAS/Part No.9005000
Table 4-3: 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-A 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 A 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 XPDR 1-2 switch. The output is OPEN (+12 to +35 V
dc) when the transponder is in standby (inactive) mode, and GROUND (< +3.5 V
dc) 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 XPDR 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(< +3.5 V dc) when in Standby mode and OPEN (+12 to +35 V dc) 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 discrete input. 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.
Pub. No. 8600200-001, Revision 004
34-45-29
4-71
04 Nov 2014
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