R 1EFF : 401-499, 1 34-14-00Page 7 1 1 Config-3 Aug 01/05 1 1 1CES 1R **ON A/C 051-099, 106-149, 204-299, 301-399, 401-499,
(3) Discrete inputs The IR portion is provided with the following discrete inputs:
---------------------------------------------------------------------| INPUT SIGNAL | INPUT | INPUT | | | | DEFINITION | ---------------------------------------------------------------------| Mounting position 1 | Open/GND | see table 2 | | Mounting position 2 | Open/GND | see table 2 | | SDI MSB (Middle insert) | Open/GND | 0/1 | | SDI LSB (Middle insert) | Open/GND | 0/1 | | CDU ON/OFF | Open/GND |Not displayed/displayed| | IR mode select M1 | Open/GND | see table 3 | | IR mode select M2 | Open/GND | see table 3 | | Auto ADR.DADS select | Open/GND | see table 4 | | Manual ADR.DADS select | Open/GND | see table 4 | | Aircraft Ident Code 1/0 |Open/A.I. Com| 0/1 | | Aircraft Ident Code 2/0 |Open/A.I. Com| 0/1 | | Aircraft Ident Code 4/0 |Open/A.I. Com| 0/1 | | Aircraft Ident Code 8/0 |Open/A.I. Com| 0/1 | | Aircraft Ident Code 16/0 |Open/A.I. Com| 0/1 | | Aircraft Ident Code 32/0 |Open/A.I. Com| 0/1 | | Aircraft Ident Code 64/0 |Open/A.I. Com| 0/1 | | Aircraft Ident Code Parity |Open/A.I. Com| 0/1 | | IR remote test | Open/GND | No test/test | | MAGVAR select | Open/GND |Standard/expended model| | GPS sensor 1 present | Open/GND | GND = present | | GPS sensor 2 present | Open/GND | GND = present | | GPS priority select | Open/GND |Normal priority/ | | | |Reserved priority | ---------------------------------------------------------------------
Table 1 : IR Discrete Inputs
(a) Mounting positions 1 and 2 These discrete inputs are used to indicate to the IR the orientation of the unit. It is needed to know the longitudinal and lateral axis of the aircraft. Table 2 below gives the unit position in function of the discrete selection.
R 1EFF : 051-099, 106-149, 204-299, 301-399, 1 34-14-00Page 8 1401-499, 1Config-3 Aug 01/05 1 1 1CES 1
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| Mounting | Mounting | Connector Position/Aircraft | | Position 1 | Position 2 | | ---------------------------------------------------------------| Open * | Open * | FWD * | | Ground | Open | AFT | | Open | Ground | RIGHT | | Ground | Ground | LEFT | ---------------------------------------------------------------Table 2 : Mounting Position Discretes
* The discretes are wired in FWD position.
(b)
IR mode select The IR portion uses these discrete inputs to know the position of the OFF/NAV/ATT selector switch as follows:
----------------------------------------------| M1 | M2 | OFF/NAV/ATT | | | | Selector Switch Position | |--------------------------------------------| | Open | Open | OFF | | Ground | Open | NAV | | Open | Ground | ATT | ----------------------------------------------Table 3 : IR Mode Select
(c)
ADR DADS select The IR portion uses these discrete inputs to know which air data source to use:
--------------------------------------------------------------------| Auto | Manual | IR Selection | | ADR DADS | ADR DADS | | --------------------------------------------------------------------| Open | Open | The IR uses the air data received | | | | on port 1 | |-------------|----------------|-----------------------------------| | Open | Ground | The IR uses the air data received | | | | on port 2 | |-------------|----------------|-----------------------------------| | Ground * | Open | The IR goes automatically from one| | | | air data source to the others | | | | according to their validity and | | | | priority. * | --------------------------------------------------------------------
Table 4 : ADR DADS Select
R 1EFF : 051-099, 106-149, 204-299, 301-399, 1 34-14-00Page 9 1401-499, 1Config-3 Aug 01/05 1 1 1CES 1 * The discretes are wired in the automatic ADR selection mode with the following priority:
1: its own ADR unit
2: ADR received on port 1
3: ADR received on port 2.
(d) SDI program pins These discretes code the installation side of the ADIRU. The following table gives the IR side according to the SDI.
--------------------------------------------| SDI-MSB | SDI-LSB | ADIRU NUMBER | --------------------------------------------| OPEN | GROUND | 1 | | GROUND | OPEN | 2 | | GROUND | GROUND | 3 | --------------------------------------------
Table 5 : IR SDI Code
R **ON A/C 005-049, 051-099, 101-149, 151-199, 201-299, 301-399, 401-499,
(e)
IR remote test The IR portion uses one discrete to select the remote test by external control. When this discrete is open, the test is not activated. When this discrete is grounded, the test is activated. In normal operation this discrete is open (unused) but can be also activated via the CFDIU on ground (Ref. 34-18-00).
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