User's Manual Part 2

ManualsBrandsACSS an L-3 Communications and Thales ManualsElectronicsTCAS

CAS / Part No. 9000000

SYSTEM DESCRIPTION AND INSTALLATION MANUAL

34-43-20

15 Feb 2003

Use or disclosure of information on this page is subject to the restrictions in the proprietary notice of this document.

4--40

Table 4--4. XS--950 Data Link Transponder Interface Description (cont)

Connector Pin

Designation

Functional Description

P1B--6A, 6B ARINC 429 MAINTENANCE DATA BUS INPUT: (P1B--6A [A], P1B--6B [B])

T wo low speed ARINC 429 busses (12.5k bits/second nominal) are provided to interface

between the transponder and an onboard maintenance system. The maintenance

computer interface is designed to work with all airframe models and types.

P1B--6C, 6D ARINC 429 MAINTENANCE DATA BUS OUTPUT: (P1B--6C [A], P1B--6D [B])

See pins P1B--6A, 6B.

P1B--6E AIR DATA SOURCE SOURCE SELECT DISCRETE INPUT:

The transponder contains dual inputs for all types of altitude sources. This discrete input

specifies which of the two inputs are used to obtain altitude information.

Ground = Altitude Source No. 2

Open = Altitude Source No. 1

P1B--6F,

P1B--6G,

P1B--6H

ALTITUDE TYPE SELECT PROGRAM INPUT:

The Altitude T ype Select program pins are used to configure the transponder for the type

of altitude source that is connected to it. The inputs use ground/open logic. The Altitude

T ype Select Common (pin P1B--6H) can be used to supply a ground.

Program Pin

P1B--6F P1B--6G Definition

Ground Ground Selects Gillham Altitude Source

Ground Open Selects ARINC 575 Altitude Source

Open Ground Selects ARINC 407 Synchro Altitude Source

Open Open Selects ARINC 429 Altitude Source

P1B--7A

THRU

P1B--7J

ARINC 565 ANALOG AC AIR DATA COMPUTER #2 INPUTS:

Second ARINC 565 Analog AC Air Data Computer Input. See pins P1A--4A Thru 4J.

P1B--71 BOTTOM ANTENNA RF INPUT:

RF input from bottom antenna.

P1C--1 XPDR 115 Vac INPUT POWER: (H)

This pin along with the XPDR 115 Vac RETURN line (pin P1C--7) provides the 115 Vac

power requirements for the transponder.

NOTE: Only --10XXX thru --54XXX transponders accept 115 Vac, 400 Hz input power .

If the 115 Vac version is used, the power should be connected througha5amp

circuit breaker, and the pins for the 28 Vdc input (P1C--10 and P1C--3) should

be left unconnected.

P1C--3 XPDR +28 Vdc RETURN: (L)

See pin P1C--10.

P1C--4 XPDR OFF (NO) INPUT:

This discrete input is used to turn the transponder power supply OFF. It should not be

connected in aircraft installations.