(c)
 Miscellaneous

 1_ Ground
 In addition to the 115VAC ground, each MCDU receives a chassis
 ground as well as pin program ground(s) which determine the
 side.
 A chassis ground is also wired to the FMS LOAD connectors.
 2_ Lamp test
 The INT LT/ANN LT switch (Ref. 33-14-00) enables, through a
 discrete, the annunciator light test to be performed.

 1EFF : ALL 1 22-84-00Page 7 1 1 Feb 01/99 1 1 1CES 1

 DISCRETES/ANALOG INTERFACES (FMGS) - DESCRIPTION AND OPERATION
______________________________________________________________
 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.

 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
 1EFF : ALL 1 22-85-00Page 1 1 1 Feb 01/98 1 1 1CES 1 ---------------------------------------------------------------------------

NAME ELECTRICAL LEVEL FROM SIGNAL STATUS ---------------------------------------------------------------------------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
 1EFF : ALL 1 22-85-00Page 2 1 1 Feb 01/98 1 1 1CES 1 (2) Discrete outputs

 -------------------------------------------------------------------------NAME ELECTRICAL LEVEL TO SIGNAL STATUS -------------------------------------------------------------------------
　
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