User's Manual

SYSTEM DESCRIPTION AND INSTALLATION MANUAL
TCAS 3000 Traffic Alert and Collision Avoidance System
34−43−23
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Page 4−24
15 Dec 2005
Table 4−2. ACSS Dual Mode S Control Panel Interface Descriptions (cont)
Connector Pin
Designation
Functional Description
J1/J2−16 AIR DATA SOURCE OUTPUT: (J1/J2−16)
Ground/Open output that is dependent on the front panel ALT RPTG and XPDR switch
positions. This discrete output is enabled when altitude reporting is selected in the ON
mode. When altitude reporting is selected OFF, the J1/J2−16 output remains in the
OPEN state.
This discrete output is connected to the transponder AIR DATA SOURCE SELECT
Discrete Input.
J1−18 MONITOR LAMP POWER INPUT: (J1−18)
This input is used as the input power source for the XPDR FAIL annunciator on the front
panel of the control panel. The input supply voltage is a dimmable 26 V dc at 200 mA
maximum.
J1/J2−20 XPDR FAIL #1 DISCRETE INPUT: (J1/J2−20)
This pin is tied directly to control panel pin J1/J2−12. See pin 12.
J1−21 LAMP TEST INPUT: (J1−21)
To initiate a lamp test, pin J1−21 must be grounded through a remote test switch. All
segments in the control panel LCD display are ON for as long as this input is grounded.
ARINC 429 labels are not affected by the activation of a lamp test mode.
J1/J2−22, 23 ARINC 429 OUTPUTS: (J1/J2−22, 23)
Communication between the control panel and the transponder is done over a two wire
low speed, odd parity, ARINC 429 compatible bus. Selected ATC code, operating mode,
and system parameters are communicated to the transponder over these lines.
Transmission of labels 013, 015, 016, and 031 is done every 150 milliseconds.
Connect these pins to one of the two transponder ARINC 429 CONTROL DATA Input
Ports.