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--23

Table 4--1. TT--950/951/952 T

CAS Computer Unit Interface Description (cont)

Connector Pin

Designation

Functional Description

J1--5 Output Bus Shields

The shields from the output bus (J1--8, 9) should be connected to this pin.

J1--6,

J1--7

A615A Data Loader Ethernet Output [J1--6 (TD+), J1--7 (TD--)]

TA WS Ethernet 10 Base--T.

J1--8, 9 ARINC 429 Data Loader/PDL Recorder Bus Output: [J1--8 (A), J1--9 (B)]

This differential pair output is a high--speed ARINC 429 bus (100K bits/second nominal)

that is used to output data from the T

CAS computer unit to the data loader . The

standards for this interface are defined in ARINC 615 Airborne Computer High Speed

Data Loader.

These pins should be connected to pins 8 and 9 of the PDL cable interface.

J1--10, 11 RS--422 Recorder External Clock Input: [J1--10 (+), J1 --11 ( --)]

These two pins provide external clocking from an RS--422 Flight Data Recorder for

TCAS.

J1--12, 13 RS--422 Recorder Reply Input: [J1 --12 (+), J1 --13 (--)]

These two pins provide communication from a RS--422 Flight Data Recorder for TCAS.

J1--14 RS--422 Recorder 125 kHz/ External Program Pin

This pin is used to designate internal or external recorder clock operation for TCAS. A

ground on this pin selects external recorder clock operation. An open selects 125k Hz

internal recorder clock operation.

J1--15 RS--422 Recorder Disable Program Pin

This program pin is used to enable or disable the RS--422 Data Recorder function for

TCAS. The program pin is activated externally by the Flight Data Recorder. Logic is as

follows:

Ground = RS--422 Recorder disabled; Open = RS--422 Recorder enabled

J1--16 Input Bus Shields

The shields from the input bus (J1--1, 2) should be connected to this pin.

J1--17 Spare Pin

J1--18 PDL Link A Discrete Input

This is a ground/open discrete (Note 1) from an portable ARINC 615 or ARINC 603 data

loader which indicates, to the T

CAS computer unit, that a data loader is connected. A

ground indicates a data loader is connected. This pin is used by the TCAS, TAWS/RWS

and GPS.

J1--19 PDL Link B Common

Connect this pin to pin 19 of the PDL cable interface.