MFC

THE "MFC" SYSTEM CONSISTS OF. One computer. Two independent computers with two modules A and B. Two computers with four independent modules lA IB 2A 2B.

EACH "MFC" MODULE PROCESSES DATA RECEIVED FROM SEVERAL SYSTEMS AND: The signals are taken into account by one or more modules, depending on the degree of reliability/safety required for the system. Each module is equipped with a self test system, monitoring correct operation of that module. Each module is supplied by two separate electrical sources (28VDC), primary and secondary. A+B+C are correct.

AN INTERNAL COMMUTATION ALLOWS AN AUTOMATIC SWITCHING FROM "NORMAL" TO "ALTERNATE" ELECTRICAL SUPPLY, IF SOURCE VOLTAGE FALLS BELOW: 19 VDC. 22 VDC. 28 VDC.

THE "MFC" IS OPERATIVE AS SOON AS CARGO DOOR CONTROL PANEL IS CLOSED AND: Battery is switched ON. Battery is switched ON and the modules self test is completed. DC BUS 1 or 2 are powered.

THE "MFC" AMBER LIGHT COMES "ON" FLASHING IN "tA" AND "2A" . MODULES TO INDICATE: Electrical supply fault is detected. Self-test of these modules. A malfunction.

WHEN A MODULE FAILURE IS DETECTED BY ITS INTERNAL MONITORING SYSTEM: Fault light only, on "MFC" panel, illuminates. Single chime sound is triggered, MASTER CAUTION light flashes, MFC illuminates on CAP and associated amber fault light on overhead panel. Single chime sound is not triggered, MASTER CAUTION light illuminates steady and MFC illuminates on CAP.