-------------------------------------------------------------------------------FIN | FUNCTIONAL DESIGNATION | PANEL|ZONE|ACCESS | ATA | | | | DOOR | REF.
-------------------------------------------------------------------------------1FP1 ADIRU-1 127 824 34-12-34 1FP2 ADIRU-2 128 824 34-12-34 1FP3 ADIRU-3 127 824 34-12-34 2FP CDU-ADIRS 20VU 211 831 34-12-12
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ADIRS - Component Location
Figure 001
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ADIRS CDU - Component Location
Figure 002
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3. Interface
_________
A. Mechanical Interface The ADIRUs are installed and aligned on a specific mounting tray in the avionics compartment in accordance with the installation design defined in ARINC 738. The ADIRU is to 4 MCU size. In order to ensure attitude and azimuth accuracy, the mounting tray orientation complies with the following tolerances:
-pitch and roll: plus or minus 12 minutes
-azimuth: plus or minus 12 minutes.
B. Electrical Interface
(1) ADIRS CDU
(a)
General
(Ref. Fig. 003)
The ADIRS CDU contains three identical connectors. Each connector
is linked to one ADIRU by means of an insert position keying.
The four annunciator discretes ADR OFF, ADR FAULT, IR ALIGN and
IR FAULT are linked to the ADIRS CDU from the ADIRU, through the
annunciator light test and interface boards.
The CDU panel lighting and LCD backlighting are provided by bulbs
supplied with 5VAC (from the A/C electrical generation).
The CDU exchanges data with the ADIRU.
The data sent by the CDU can be used for the initialization of
the IR portion. The data received by the CDU are displayed on the
Liquid Crystal Display (LCD).
(b)
CDU Digital Form The tables below contain all the output parameters in the digital form. They are sorted as per the numerical order of their output label. The following tables give:
-EQ.SYS.LAB.SDI: (SDAC, FWC, DMC...) output label for which the parameter is available
-PARAMETER DEFINITION: parameter name
-WORD RANGE/OPER RANGE/RESOLUTION ACCURACY: measurement range Maximum value transmitted. When the digital value changes, the change step is equal to the accuracy
-UNIT: unit in which the digital value is transmitted
-SIG BIT: indicates whether a sign bit is available
-BITS: number of bits used by the parameter in the label
-XMSN/INTV: output transmission interval. The refresh rate is given in milliseconds.
-CODE:
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ADIRS CDU - Electrical Interface
Figure 003
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BNR: binary data word
BCD: binary coded decimal data word
ISO: data word coded in ISO5 code
DIS: discrete data word
HEX: hexadecimal coded
HYB: mixed code.
-ALPHA CODE: indicates the parameter mnemonic code
-SOURCE ORIGIN: parameter source computer or system.
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_ The CDU receives an ARINC 429 High Speed bus from the IR portion of each ADIRU.
-------------------------------------------------------------------------------| PARAMETER LIST PARAMETER CHARACTERISTICS (NUMERIC) | -------------------------------------------------------------------------------|EQ.SYS.LAB.SDI|PARAMETER | WORD RANGE |UNIT|SIG |BITS|XMSN|CODE|ALPHA|SOURCE | | |DEFINITION| OPER RANGE | |BIT | |INTV| |CODE |ORIGIN | | |(*=REMARK)| RESOLUTION | | | | | | |BUS No.| | |(X=NOTE) | ACCURACY | | | | | | |ATA REF| | | | | | | | | | |CONV | -------------------------------------------------------------------------------| 010 |PRESENT |90S-90N |DEG | | 6 | | BCD| | | |POS LAT-D |(POSITIVE: |& | | | | | | | | |NORTH FROM |MIN | | | | | | | | |0 DEG) | | | | | | | | | |RESOL = .1 | | | | | | | |-----------------------------------------------------------------------------| | 011 |PRESENT |180E-180W |DEG | | 6 | | BCD| | | |POS LONG-D |(POSITIVE: |& | | | | | | | | |EAST FROM |MIN | | | | | | | | |0 DEG) | | | | | | | | | |RESOL = .1 | | | | | | | |--------------|-----------|-----------|----|---|----|----|----|--------------| | 012 |GROUND |0-2000 |Kt | | 4 | | BCD| | | |SPEED-D |(ALWAYS | | | | | | | | | |POSITIVE) | | | | | | | | | |RESOL = 1 | | | | | | | |--------------|-----------|-----------|----|---|----|----|----|--------------| | 013 |TRACK |0-359.9 |DEG | | 4 | | BCD| | | |ANGLE TRUE |(POSITIVE: | | | | | | | | | |CW FROM | | | | | | | | | |NORTH) | | | | | | | | | |RESOL = .1 | | | | | | | |--------------|-----------|-----------|----|---|----|----|----|--------------| | 014 |MAGNETIC |0-359.9 |DEG | | 4 | | BCD| | | |HEADING |(POSITIVE: | | | | | | | | | |CW FROM | | | | | | | | | |NORTH) | | | | | | | | | |RESOL = .1 | | | | | | | |--------------|-----------|-----------|----|---|----|----|----|--------------| | 015 |WIND SPEED |0-256 |Kt | | 3 | | BCD| | | | |(ALWAYS | | | | | | | | | |POSITIVE) | | | | | | | | | |RESOL = 1 | | | | | | | |--------------|-----------|-----------|----|---|----|----|----|--------------|
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