FAC: DISCRETE/ANALOG INTERFACES - DESCRIPTION AND OPERATION

** ON A/C NOT FOR ALL

1. General
The FAC utilizes:

Hard-wired discretes
Analog signals
FAC - Discretes/Analog Interfaces

** ON A/C NOT FOR ALL

2. Discrete Signals

A. Inputs

NOTE: The pin program inputs are not listed.

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! NAME ! ELECTRICAL LEVEL ! FROM ! SIGNAL STATUS !

!----------------------!------------------!---------------!-------------------!

! AP OWN ENGD COM ! GND/O.C. ! FMGC OWN C ! GND = ENGAGED !

! AP OWN ENGD MON ! GND/O.C. ! FMGC OWN M ! GND = ENGAGED !

! AP OPP ENGD COM ! GND/O.C. ! FMGC OPP C ! GND = ENGAGED !

! AP OPP ENGD MON ! GND/O.C. ! FMGC OPP M ! GND = ENGAGED !

!----------------------!------------------!---------------!-------------------!

! YAW OWN ENGD COM ! GND/O.C. ! FAC OWN C ! GND = ENGAGED !

! YAW OWN ENGD MON ! GND/O.C. ! FAC OWN M ! GND = ENGAGED !

! YAW OPP ENGD COM ! GND/O.C. ! FAC OPP C ! GND = ENGAGED !

! YAW OPP ENGD MON ! GND/O.C. ! FAC OPP M ! GND = ENGAGED !

!----------------------!------------------!---------------!-------------------!

! RUD TR OWN ENGD COM ! GND/O.C. ! FAC OWN C ! GND = ENGAGED !

! RUD TR OWN ENGD MON ! GND/O.C. ! FAC OWN M ! GND = ENGAGED !

! RUD TR OPP ENGD COM ! GND/O.C. ! FAC OPP C ! GND = ENGAGED !

! RUD TR OPP ENGD MON ! GND/O.C. ! FAC OPP M ! GND = ENGAGED !

!----------------------!------------------!---------------!-------------------!

! RTL OWN ENGD COM ! GND/O.C. ! FAC OWN C ! GND = ENGAGED !

! RTL OWN ENGD MON ! GND/O.C. ! FAC OWN M ! GND = ENGAGED !

! RTL OPP ENGD COM ! GND/O.C. ! FAC OPP C ! GND = ENGAGED !

! RTL OPP ENGD MON ! GND/O.C. ! FAC OPP M ! GND = ENGAGED !

!----------------------!------------------!---------------!-------------------!

! ELAC OWN HLTY MON ! GND/O.C. ! ELAC OWN M ! GND = HEALTHY !

! ELAC OPP HLTY COM ! GND/O.C. ! ELAC OPP C ! GND = HEALTHY !

!----------------------!------------------!---------------!-------------------!

! ENG OWN STP ! GND/O.C. ! PRESS SW OWN ! GND = STOPPED !

! ENG OPP STP ! GND/O.C. ! PRESS SW OPP ! GND = STOPPED !

!----------------------!------------------!---------------!-------------------!

! RUD TR R NC COM ! GND/O.C. ! ) RUDDER ! OC = RIGHT !

! RUD TR R NO MON ! GND/O.C. ! ) TRIM ! GND = RIGHT !

! RUD TR L NC COM ! GND/O.C. ! ) COMMAND ! OC = LEFT !

! RUD TR L NO MON ! GND/O.C. ! ) SWITCH ! GND = LEFT !

!----------------------!------------------!---------------!-------------------!

! RUD TR RES COM ! GND/O.C. ! ) RUDDER TRIM ! OC = RESET !

! RUD TR RES MON ! GND/O.C. ! ) RESET SW ! GND = RESET !

!----------------------!------------------!---------------!-------------------!

! YAW BYP PRESS SW ! GND/O.C. ! ) YAW ! OC = (EV1 = EV2) !

! YAW BYP PRESS SW RET ! GND/O.C. ! ) ACTUATOR ! OC = (EV1 dif EV2)!

!----------------------!------------------!---------------!-------------------!

! FAC ENGT SW COM ! 28V/O.C. ! ) FAC ! 28V = ACTIVE !

! FAC ENGT SW MON ! GND/O.C. ! )ENGAGEMENT SW! GND = ACTIVE !

!----------------------!------------------!---------------!-------------------!

! FAC OPP HLTY COM ! GND/O.C. ! FAC OPP C ! GND = HEALTHY !

! FAC OPP HLTY MON ! GND/O.C. ! FAC OPP M ! GND = HEALTHY !

!----------------------!------------------!---------------!-------------------!

! SIDE 1 COM ! GND/O.C. ! AIRCRAFT ! GND = SIDE 1 !

! SIDE 1 MON ! GND/O.C. ! AIRCRAFT ! GND = SIDE 1 !

!----------------------!------------------!---------------!-------------------!

! RUD TR ACT HLTY ! GND/O.C. ! TRIM ACTR ! GND = HEALTHY !

! RTL ACT HLTY ! GND/O.C. ! RTL ACTR ! GND = HEALTHY !

!----------------------!------------------!---------------!-------------------!

! SLATS EXTD ! GND/O.C. ! SFCC OWN ! GND = EXTD !

! N GEAR PRESD ! GND/O.C. ! LGCIU ! GND = PRESD !

!----------------------!------------------!---------------!-------------------!

! ATT SW ! GND/O.C. ! ATTITUDE SW ! GND = IRS 3 !

! AIR DATA SW ! GND/O.C. ! AIR DATA SW ! GND = ADC 3 !

!----------------------!------------------!---------------!-------------------!

! HYD CIRC PRESS SW ! GND/O.C. ! HYDRAULIC CKT ! GND = PRESS !

!----------------------!------------------!---------------!-------------------!

! YAW EV COM RET ! 28V/O.C. ! ) YAW ! 28V = ACTIVE !

! YAW EV MON RET ! 28V/O.C. ! ) ACTUATOR ! 28V = ACTIVE !

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B. Outputs

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! NAME ! ELECTRICAL LEVEL ! TO ! SIGNAL STATUS !

!----------------------!------------------!---------------!-------------------!

! FAC ENGD CMD ! 28V/O.C. ! ) FAC ! 28V = ENGAGED !

! FAC ENGD MON ! GND/O.C. ! ) P/B SW ! GND = ENGAGED !

!----------------------!------------------!---------------!-------------------!

! FAC HLTY COM OWN ! GND/O.C. ! FMGC OWN ! GND = HEALTHY !

! FAC HLTY MON OWN ! GND/O.C. ! FMGC OWN ! GND = HEALTHY !

! ! ! FWC OWN ! !

! ! ! DMC 1, 2, 3 ! !

!----------------------!------------------!---------------!-------------------!

! FAC HLTY COM OPP ! GND/O.C. ! FMGC OPP ! GND = HEALTHY !

! ! ! FAC OPP ! !

! FAC HLTY MON OPP ! GND/O.C. ! FMGC OPP ! GND = HEALTHY !

! ! ! FAC OPP ! !

! ! ! FWC OPP ! !

!----------------------!------------------!---------------!-------------------!

! YAW ENGD COM ! GND/O.C. ! FAC OPP C ! GND = ENGAGED !

! YAW ENGD MON ! GND/O.C. ! FAC OPP M ! GND = ENGAGED !

!----------------------!------------------!---------------!-------------------!

! RUD TR ENGD COM ! GND/O.C. ! FAC OPP C ! GND = ENGAGED !

! RUD TR ENGD MON ! GND/O.C. ! FAC OPP M ! GND = ENGAGED !

!----------------------!------------------!---------------!-------------------!

! RTL ENGD COM ! GND/O.C. ! FAC OPP C ! GND = ENGAGED !

! RTL ENGD MON ! GND/O.C. ! FAC OPP M ! GND = ENGAGED !

!----------------------!------------------!---------------!-------------------!

! YAW EV COM ! 28V/O.C. ! ) YAW ! 28V = BYPASS !

! YAW EV MON ! 28V/O.C. ! ) ACTUATOR ! 28V = BYPASS !

!----------------------!------------------!---------------!-------------------!

! RUD TR ACT PWR ON ! 28V/O.C. ! RUD TRIM RLY ! 28V = POWER !

! RUD TR ACT VALID ! 28V/O.C. ! TRIM ACTR ! 28V = VALID !

!----------------------!------------------!---------------!-------------------!

! RTL ACT PWR ON ! 28V/O.C. ! RELAY RTL ! 28V = POWER !

! RTL ACT VALID ! 28V/O.C. ! RTL ACTR ! 28V = VALID !

!----------------------!------------------!---------------!-------------------!

! RTL EMER ORDER ! 28V/O.C. ! ) RTL ! 28V = EMER !

! RTL EMER ORDER RET ! GND/O.C. ! ) ACTUATOR ! GND = EMER !

!----------------------!------------------!---------------!-------------------!

! YD NLAW COM ! GND/O.C. ! ELAC 1, 2 ! GND = NLAW !

! YD NLAW MON ! GND/O.C. ! ELAC 1, 2 ! GND = NLAW !

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** ON A/C NOT FOR ALL

3. Analog Signals

A. Inputs

-------------------------------------------------------------------------------

! Signal ! From ! Acqn ! I/P No. ! Wire No.!

!---------------------------------!----------------!------!---------!---------!

! YAW V1 COM H ! ) ! C ! ) 1 ! ) 2 !

! YAW V1 COM C ! ) YAW ! C ! ) ! ) !

! ! ) ACTUATOR ! ! ! !

! YAW V2 COM H ! ) LVDT ! C ! ) 1 ! ) 2 !

! YAW V2 COM C ! ) ! C ! ) ! ) !

!---------------------------------!----------------!------!---------!---------!

! YAW V1 MON H ! ) ! M ! ) 1 ! ) 2 !

! YAW V1 MON C ! ) YAW ! M ! ) ! ) !

! ! ) ACTUATOR ! ! ! !

! YAW V2 MON H ! ) RVDT ! M ! ) 1 ! ) 2 !

! YAW V2 MON C ! ) ! M ! ) ! ) !

!---------------------------------!----------------!------!---------!---------!

! RUD TR V1 COM H ! ) ! C ! ) 1 ! ) 2 !

! RUD TR V1 COM C ! ) RUDDER TRIM ! C ! ) ! ) !

! ! ) ACTUATOR ! ! ! !

! RUD TR V2 COM H ! ) RVDT ! C ! ) 1 ! ) 2 !

! RUD TR V2 COM C ! ) ! C ! ) ! ) !

!---------------------------------!----------------!------!---------!---------!

! RUD TR V1 MON H ! ) ! M ! ) 1 ! ) 2 !

! RUD TR V1 MON C ! ) RUDDER TRIM ! M ! ) ! ) !

! ! ) ACTUATOR ! ! ! !

! RUD TR V2 MON H ! ) RVDT ! M ! ) 1 ! ) 2 !

! RUD TR V2 MON C ! ) ! M ! ) ! ) !

!---------------------------------!----------------!------!---------!---------!

! RTL V1 H ! ) ! C ! ) 1 ! ) 2 !

! RTL V1 C ! ) RTL ! C ! ) ! ) !

! ! ) ACTUATOR ! ! ! !

! RTL V2 H ! ) RVDT ! C ! ) 1 ! ) 2 !

! RTL V2 C ! ) ! C ! ) ! ) !

!---------------------------------!----------------!------!---------!---------!

! 28V+ ! ) AIRCRAFT ! C ! ) 1 ! ) 2 !

! 28V GND ! ) GENERATION ! C ! ) ! ) !

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B. Outputs

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! Signal ! To ! O/P No. ! Wire No. !

!--------------------------------!----------------------!----------!----------!

! YAW SV ORDER H ! YAW ! ) 1 ! ) 2 !

! YAW SV ORDER C ! ACTUATOR ! ) ! ) !

!--------------------------------!----------------------!----------!----------!

! RUD TR ORDER H ! RUD TRIM ! ) 1 ! ) 2 !

! RUD TR ORDER C ! ACTUATOR ! ) ! ) !

!--------------------------------!----------------------!----------!----------!

! RTL ORDER H ! RTL ! ) 1 ! ) 2 !

! RTL ORDER C ! ACTUATOR ! ) ! ) !

!--------------------------------!----------------------!----------!----------!

! CHASSIS GND ! AIRCRAFT ! 1 ! 1 !

!--------------------------------!----------------------!----------!----------!

! AC 28V ! FAC ! 1 ! 1 !

! AC 28V GND ! P/B SW ! 1 ! 1 !

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[Rev.10 from 2021] 2026.03.31 23:10:37 UTC