DOC AIRBUS | AMM A320FFMGS: DISCRETE/ANALOG INTERFACES - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
1. General
There is a segregation in the aircraft electrical routing between the side 1 and the side 2. The wires for the command channel and those for the monitoring channel are also separated in each side.
The different interconnections are defined in the schematic diagrams of the circuit CA.
** ON A/C NOT FOR ALL There is a segregation in the aircraft electrical routing between the side 1 and the side 2. The wires for the command channel and those for the monitoring channel are also separated in each side.
The different interconnections are defined in the schematic diagrams of the circuit CA.
2. Discrete Signals
A. FMGC (Flight Management and Guidance Computer)
(1) Discrete inputs (pin programs are not listed)
| --------------------------------------------------------------------------- |
| NAME ELECTRICAL LEVEL FROM SIGNAL STATUS |
| --------------------------------------------------------------------------- |
| FAC OPP HLTY COM GND/O.C. FAC OPP GND=HEALTHY |
| FAC OPP HLTY MON GND/O.C. FAC OPP GND=HEALTHY |
| ATH OPP ENGD COM GND/O.C. FCU OPP GND=ENGAGED |
| ATH OPP ENGD MON GND/O.C. FCU OPP GND=ENGAGED |
| ELAC OPP AP DISC COM GND/O.C. ELAC OPP O.C.=DISCONNECTION |
| ELAC OPP AP DISC MON GND/O.C. ELAC OPP O.C.=DISCONNECTION |
| AP OPP ENGD COM GND/O.C. FMGC OPP GND=ENGAGED |
| AP OPP ENGD MON GND/O.C. FMGC OPP GND=ENGAGED |
| FD OPP ENGD COM GND/O.C. FMGC OPP GND=ENGAGED |
| FD OPP ENGD MON GND/O.C. FMGC OPP GND=ENGAGED |
| BSCU OPP VALID COM GND/O.C. BSCU GND=VALID |
| BSCU OPP VALID MON GND/O.C. BSCU GND=VALID |
| FAC OWN HLTY COM GND/O.C. FAC OWN GND=HEALTHY |
| FAC OWN HLTY MON GND/O.C. FAC OWN GND=HEALTHY |
| ATH OWN ENGD COM OPP GND/O.C. FMGC OPP GND=ENGAGED |
| ATH OWN ENGD COM OWN GND/O.C. FCU OWN GND=ENGAGED |
| ATH OWN ENGD MON OPP GND/O.C. FMGC OPP GND=ENGAGED |
| ATH OWN ENGD MON OWN GND/O.C. FCU OWN GND=ENGAGED |
| ELAC OWN AP DISC COM GND/O.C. ELAC OWN O.C.=DISCONNECTION |
| ELAC OWN AP DISC MON GND/O.C. ELAC OWN O.C.=DISCONNECTION |
| AP OWN ENGD COM OWN GND/O.C. FMGC OWN GND=ENGAGED |
| AP OWN ENGD COM OPP GND/O.C. FMGC OWN GND=ENGAGED |
| AP OWN ENGD MON OWN GND/O.C. FMGC OWN GND=ENGAGED |
| AP OWN ENGD MON OPP GND/O.C. FMGC OWN GND=ENGAGED |
| BSCU OWN VALID COM GND/O.C. BSCU GND=VALID |
| BSCU OWN VALID MON GND/O.C. BSCU GND=VALID |
| FCU OWN AP SW COM GND/O.C. FCU OWN GND=PUSHED |
| FCU OWN AP SW MON GND/O.C. FCU OWN GND=PUSHED |
| AP INST DISC NC GND/O.C. RELAY O.C.=ACTION |
| AP INST DISC NO GND/O.C. RELAY O.C.=ACTION |
| RIGHT WHEEL SPD GND/O.C. BSCU GND=SPD>70KT |
| LEFT WHEEL SPD GND/O.C. BSCU GND=SPD>70KT |
| FWC OWN VALID GND/O.C. FWC OWN GND=VALID |
| FWC OPP VALID GND/O.C. FWC OPP GND=VALID |
| PFD OWN VALID GND/O.C. DMC OWN GND=VALID |
| PFD OPP VALID GND/O.C. DMC OPP GND=VALID |
| PS SPLIT GND/O.C. CNTORS GND=PS SPLIT |
| FCU OWN ATH SW COM GND/O.C. FCU OWN GND=PUSHED |
| FCU OWN ATH SW MON GND/O.C. FCU OWN GND=PUSHED |
| ATH INST DISC NC GND/O.C. RELAYS O.C.=ACTION |
| ATH INST DISC NO GND/O.C. RELAYS O.C.=ACTION |
| ATT 3 SW GND/O.C. SWITCHES GND=ATT 3 |
| NOSE GEAR OWN GND/O.C. LGCIU OWN GND=GEAR PRESSED |
| ADC 3 SW GND/O.C. SWITCHES GND=ADC 3 |
| SIDE 1 (COM) GND/O.C. A/C GND GND=SIDE 1 |
| (O.C.=SIDE 2) |
| SIDE 1 (MON) GND/O.C. A/C GND GND=SIDE 1 |
| (O.C.=SIDE 2) |
| FCU OWN HLTY GND/O.C. FCU OWN GND=HEALTHY |
| FCU OPP HLTY GND/O.C. FCU OPP GND=HEALTHY |
| ENG OWN STOP GND/O.C. SW ENG GND=STOPPED |
| ENG OPP STOP GND/O.C. SW ENG GND=STOPPED |
| MCDU OPP FAIL GND/O.C. MCDU OPP O.C.=FAIL |
| NAV CONTROL OWN GND/O.C. RMP OWN GND=FM CTL |
| (O.C.=RMP CTL) |
| NAV CONTROL OPP GND/O.C. RMP OPP GND=FM CTL |
| (O.C.=RMP CTL) |
| MCDU OWN FAIL GND/O.C. MCDU OWN O.C.=FAIL |
| FMGC OPP HLTY GND/O.C. FMGC OPP GND=HEALTHY |
| DATA LOADER 1 GND/O.C. I DATA I GND=DATA |
| DATA LOADER 2 GND/O.C. I LOADER I LOADER |
| DATA LOADER 3 GND/O.C. I I CONNECTED |
(2) Discrete outputs
| ------------------------------------------------------------------------- |
| NAME ELECTRICAL LEVEL TO SIGNAL STATUS |
| ------------------------------------------------------------------------- |
| ILS TEST INHIBIT GND/O.C. ILS OWN GND=INHIBITED |
| FCU OWN FAIL GND/O.C. FCU OWN GND=VALID |
| ATH OWN ENGD COM OPP GND/O.C. FCU OWN GND=ENGAGED |
| AP OWN ENGD COM OWN GND/O.C. FCU OWN GND=ENGAGED |
| FD OWN ENGD COM OPP GND/O.C. FCU OWN GND=ENGAGED |
| ATH OWN ENGD COM OWN GND/O.C. FMGC&FCU OWN GND=ENGAGED |
| AP OWN ENGD COM OPP GND/O.C. FMGC OWN&OPP GND=ENGAGED |
| FD OWN ENGD COM OWN GND/O.C. FCU OWN GND=ENGAGED |
| STICK LOCK COM 28V/O.C. RELAYS GND=LOCKED |
| RUDDER LOCK COM 28V/O.C. RELAY GND=LOCKED |
| FMGC HLTY GND/O.C. MCDU OWN GND=HEALTHY |
| ATH OWN ENGD MON OPP GND/O.C. FMGC OWN&OPP GND=ENGAGED |
| AP OWN ENGD MON OWN GND/O.C. FCU OWN GND=ENGAGED |
| FD OWN ENGD MON OPP GND/O.C. FMGC OPP GND=ENGAGED |
| ATH OWN ENGD MON OWN GND/O.C. FCU OWN GND=ENGAGED |
| AP OWN ENGD MON OPP GND/O.C. FMGC OWN&OPP GND=ENGAGED |
| FD OWN ENGD MON OWN GND/O.C. FCU OWN GND=ENGAGED |
| STICK LOCK MON GND/O.C. RELAYS GND=LOCKED |
| RUDDER LOCK MON GND/O.C. RELAY GND=LOCKED |
B. FCU (Flight Control Unit)
(1) Discrete inputs
| ------------------------------------------------------------------------- |
| NAME ELECTRICAL LEVEL FROM SIGNAL STATUS |
| ------------------------------------------------------------------------- |
| FD1 ENGD MON OWN GND/O.C. FMGC1 GND=ENGAGED |
| FD1 ENGD COM OWN GND/O.C. FMGC1 GND=ENGAGED |
| FD2 ENGD MON OWN GND/O.C. FMGC2 GND=ENGAGED |
| FD2 ENGD COM OWN GND/O.C. FMGC2 GND=ENGAGED |
| LAMP TEST GND/O.C. RELAY GND=TEST |
| FCU1 FAIL GND/O.C. FMGC1 GND=VALID |
| ATH1 ENGD MON OWN GND/O.C. FMGC1 GND=ENGAGED |
| ATH1 ENGD COM OWN GND/O.C. FMGC1 GND=ENGAGED |
| ATH2 ENGD MON OWN GND/O.C. FMGC2 GND=ENGAGED |
| ATH2 ENGD COM OWN GND/O.C. FMGC2 GND=ENGAGED |
| AP1 ENGD MON OWN GND/O.C. FMGC1 GND=ENGAGED |
| AP1 ENGD COM OWN GND/O.C. FMGC1 GND=ENGAGED |
| AP2 ENGD MON OWN GND/O.C. FMGC2 GND=ENGAGED |
| AP2 ENGD COM OWN GND/O.C. FMGC2 GND=ENGAGED |
| FD1 ENGD MON OWN GND/O.C. FMGC1 GND=ENGAGED |
| FD1 ENGD COM OWN GND/O.C. FMGC1 GND=ENGAGED |
| FD2 ENGD MON OWN GND/O.C. FMGC2 GND=ENGAGED |
| FD2 ENGD COM OWN GND/O.C. FMGC2 GND=ENGAGED |
| CHASSIS GROUND GND/O.C. A/C GND PERMANENT |
| FCU2 FAIL GND/O.C. FMGC2 GND=VALID |
(2) Discrete outputs
| ------------------------------------------------------------------------- |
| NAME ELECTRICAL LEVEL TO SIGNAL STATUS |
| ------------------------------------------------------------------------- |
| ATH1 SW COM GND/O.C. FMGC1 GND=PUSHED |
| ATH1 SW MON GND/O.C. FMGC1 GND=PUSHED |
| ATH2 SW COM GND/O.C. FMGC2 GND=PUSHED |
| ATH2 SW MON GND/O.C. FMGC2 GND=PUSHED |
| FCU1 HLTY GND/O.C. FMGC1 GND=HEALTHY |
| FCU2 HLTY GND/O.C. FMGC2 GND=HEALTHY |
| CMD1 SW COM GND/O.C. FMGC1 GND=PUSHED |
| CMD1 SW MON GND/O.C. FMGC1 GND=PUSHED |
| CMD2 SW COM GND/O.C. FMGC2 GND=PUSHED |
| CMD2 SW MON GND/O.C. FMGC2 GND=PUSHED |
C. MCDU (Multipurpose Control and Display Unit) - Discrete inputs
| _______________________________________________________________________ |
| ! NAME ELECTRICAL LEVEL SIGNAL STATUS ! |
| !---------------------------------------------------------------------! |
| ! SDI1 GND/O.C. I see the ! |
| ! SDI2 GND/O.C. I note ! |
| ! LAMP TEST GND/O.C. GND=TEST ! |
| ! ACTIVE PORT PROGRAM GND/O.C. GND=HEALTHY ! |
| ! (FMGC HLTY) ! |
| !_____________________________________________________________________! |
NOTE: (A/C GND = 1)
SD1=1,SD2=0 for the MCDU1.
SD1=0,SD2=1 for the MCDU2.
SD1=1,SD2=0 for the MCDU1.
SD1=0,SD2=1 for the MCDU2.
D. MCDU (Multipurpose Control and Display Unit) - Discrete outputs
| _______________________________________________________________________ |
| ! NAME ELECTRICAL LEVEL TO SIGNAL STATUS ! |
| !---------------------------------------------------------------------! |
| ! MCDU FAIL DISCRETE GND/O.C. FMGC1 & 2 O.C.=FAIL ! |
| !_____________________________________________________________________! |
NOTE: If the MCDU3 is installed, the MCDU FAIL DISCRETE is not wired.