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forward attendant station.
From the FAP, the various cabin systems can be
controlled and monitored.
PROGRAMMING AND TEST PANEL
The Programming and Test Panel (PTP) is installed at
the forward attendant station next to the FAP.
The PTP contains the Cabin Assignment Module (CAM)
which is used to store all information for the actual
cabin layout.
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CABIN INTERCOMMUNICATION DATA SYSTEM PRESENTATION
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23 - COMMUNICATIONS
23-73-00 CIDS - DIRECTOR/DEU ARCHITECTURE
CONTENTS:
DEU A
DEU B
Self Examination
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CIDS - DIRECTOR/DEU ARCHITECTURE
DEU A
Twenty six type A Decoder Encoder Units (DEUs) are
installed above the windows in the cabin ceiling and
close to the center ceiling for the DEUs in the entrance
area.
The type A DEUs are connected to the directors via a
top-line data bus (i.e. : two wire twisted and shielded
cable).
A broken wire in one top-line bus will only affect the
type A DEUs behind the crack on this bus.
The type A DEUs of the other top-line bus will work
without disturbance.
PASSENGER SIGNS
The passenger signs include NO SMOKING or the optional
NO ELECTRONIC DEVICE lights, FASTEN SEAT BELT lights,
NON SMOKER ZONE lights and RETURN TO SEAT lights in
the lavatories.
Furthermore, for the PAX call system, the seat row
lights are connected to the type A DEUs.
CABIN LIGHTS
The cabin lights include:
- Entrance area lights,
- Lavatory lights,
- Attendant lights,
- Reading lights,
- Cabin fluorescent strip lights.
LOUDSPEAKERS
The loudspeakers are installed in the Passenger Service
Unit (PSU), in each lavatory and close to the attendant
station.
They are all identical and are used for:
- Passenger address announcements,
- Call chimes (optional).
PASSENGER CALL
Pushbuttons are fitted in the PSU above each seat row
and in the lavatories.
READING/LIGHT POWER UNIT
One R/L power unit for three reading lights is
installed in each Passenger Service Unit (PSU).
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CIDS - DIRECTOR/DEU ARCHITECTURE
DEU B
Basically 4 type B DEUs (max. 6 - Optional) are
installed near the exit doors in the center ceiling.
They are connected to the directors via a middle line
data bus.
There are two supplementary DEU B mounts installed as
a provision.
The fig. on the next page shows a typical Type B DEU
interface. It may vary with different locations and
with specific airline requirements.
SLIDE PRESSURE SYSTEM (Optional)
The directors receive signals from the bottle pressure
sensors via type B DEUs.
If the pressure is low, the CIDS CAUTION light on the
FAP comes on.
DOOR PRESSURE SYSTEM (Optional)
The directors receive signals from the bottle pressure
sensors via type B DEUs.
If the pressure is low, the CIDS CAUTION light on the
FAP comes ON.
CREW INTERPHONE SYSTEM
The crew interphone system enables communication
between cockpit crew and cabin attendants and between
each attendant station.
NOTE: From each attendant station it is possible to
communicate with personnel at the service
interphone connections.
EPSUs
The Emergency Power Supply Units (EPSUs) are connected
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