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ALL
CIDS - DIRECTOR INTERFACES
CENTRALIZED FAULT DISPLAY INERFACE UNIT
Low speed arinc 429 data buses are used for BITE data
transmission to the Centralized Fault Display
Interface Unit.
SYSTEM DATA ACQUISITION CONCENTRATOR
A high speed arinc 429 data bus is used for transmission
of doors position information from SDAC 1 for
activation of the row numbering light, after a
passenger call during boarding.
Four discrete signals are sent to the SDACs for CIDS
operation status information.
- NO SMOKING signs,
- FASTEN SEAT BELT signs,
- CIDS operation status,
- CIDS caution.
AUDIO MANAGEMENT UNIT
Audio and discrete lines are used for transmission or
reception of the Passenger Address announcements or
interphone communications.
Discrete lines are used for activation or deactivation
of the Passenger Address, interphone, attendant call
and attendant call reset functions.
COCKPIT HANDSET
A cockpit handset is connected to the directors for
Passenger Address announcements to the cabin.
SERVICE INTERPHONE BOOMSETS
Boomsets are connected to the directors for service
interphone communications.
CALLS PANEL
Discrete lines are used for activation of CALLS to the
cabin attendants or to the ground mechanic with
dedicated visual and aural indications.
SIGNS PANEL
Discrete lines are used for manually or automatically
activating or deactivating the info signs in the cabin.
OIL LOW PRESSURE RELAY (12KS1)
A discrete signal is used to automatically increase
or decrease The Passenger Address level in the cabin
when the engines are started or stopped.
LANDING GEAR CONTROL AND INTERFACE UNIT
Two discrete lines are used for incrementation of the
fault memory or activation or deactivation of the
service interphone and NO SMOKING/FASTEN SEAT BELT
signs when the info switches are in the auto position.
SLAT FLAP CONTROL COMPUTER
Discrete signals are used for automatically activating
or deactivating the NO SMOKING/FASTEN SEAT BELT info
signs in the cabin.
FLIGHT WARNING COMPUTER
A discrete line is used for activation of aural
warnings in the cockpit, through the Flight Warning
Computer.
TMUCI2W03-T01 LEVEL 3
EFFECTIVITY 23-73-00 Page 4
Apr 30/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 23 COMMUNICATIONS
UF94200
EFFECTIVITY Page 322
ALL
CIDS - DIRECTOR INTERFACES
SERVICE INTERPHONE OVERRIDE PUSHBUTTON
A discrete line is used to activate or deactivate the
service interphone system when the aircraft is in flight
or on the ground with the landing gear not compressed
and the external power plug not connected.
FORWARD ATTENDANT PANEL
Low speed arinc 429 data buses are used for
transmission and reception of the controls, status and
BITE system information.
PTP
Low speed arinc 429 data buses are used for
transmission and reception of data regarding the cabin
programming, system test activation and system status.
DIRECTORS
Low speed arinc 429 data buses are used for data
exchange between the active and standby directors.
The discrete lines are used for the synchronization
of the two directors.
COCKPIT DOOR SWITCH
The cockpit door switch discrete signal is used to
automatically dim the lights and attenuate the PA
level, at the entrance door, when the engines are
running and the door is open.
EVAC PANEL
Discrete lines are used to activate or deactivate aural
and visual indications in the cockpit and cabin after
activation of the evac system.
EVAC HORN
An analog signal activates the evac aural signal.
CABIN PRESSURE RELAY (19WR)
The cabin pressure relay discrete signal is used to
automatically increase the PA level in the cabin in
case of rapid cabin decompression when the cabin
altitude is above 14000 feet.
EXCESSIVE ALTITUDE PRESSURE SWITCHES
Discrete lines are used to automatically activate or
deactivate the NO SMOKING, FASTEN SEAT BELT, RETURN
TO SEAT and EXIT signs in the cabin, when the cabin
altitude is above 11300 feet.
SMOKE DETECTION CONTROL UNIT
Low speed arinc 429 data buses are used for
transmission of the smoke detection warnings
information to the FAP and of the smoke detectors
status to the PTP and CFDIU through the directors.
AUDIO REPRODUCER
Audio lines are used for broadcasting the boarding
music in the cabin.
Discrete signals from the Directors are used to
interrupt the program and to initiate the audio
reproducer test, to select the Boarding Music channel
　
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