A319 A320 A321 飞机维护手册 AMM Aircraft Maintenance Manual 14_部分6.pdf350页

R 3. System Description __________________ A. System Philosophy To make it easy to change the cabin layout, the CIDS hardware has spare inputs, outputs and circuits. These allow the connection of new and additional equipment without a hardware change of CIDS components. Furthermore the software of the CIDS defines all operations. If any equipment is changed, only the CIDS software database must be modified. To change the configuration refere to options, cabin reconfiguration or CIDS expansion it is only necessary to do a software database change. This decreases the time that the aircraft is out-of-service. CIDS is also designed to sense faults in CIDS components and in the connected equipment by itself. Thus scheduled maintenance is unnecessary. The system philosophy is based on: R - A microprocessor-controlled data bus system, - The connection of cabin systems via data bus cables, - Four data bus lines (two top lines for PAX related systems and the cabin illumination and two middle lines for crew related systems), - Two functional units for the data bus control, the CIDS directors 1 and 2, - One director in active mode and the second one in hot-standby, - Immediate switchover to the second director if a failure of the first one occurs, - A Flight Attendant Panel (FAP) to program, to control and to indicate the status of the CIDS and related cabin systems and to emulate CFDS reports, - Provisions for additional Flight Attendant Panels (FAP), - Addressable Decoder/Encoder Units type A (DEU type A) for the interface between top line data buses and cabin related systems, - Passenger Interface and Supply Adapters (PISA) for the interface between Decoder/Encoder Units type A (DEU type A) and some cabin related systems/units, - Stand Alone Passenger Interface and Supply Adapters (StA PISA) for the interface between Decoder/Encoder Units type A (DEU type A) and equipment/ indications installed near the cabin attendant stations fwd and aft (Ref. 33-27-00), - Addressable Decoder/Encoder Units type B (DEU type B) for the interface between middle line data buses and crew related systems, - Configuration of cabin zones and other system properties in address tables which are stored in a software database, the Cabin Assignment Module (CAM), - Easy exchange of the CAM which is plugged into the FAP,

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