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to type B DEUs for the emergency lighting system test.
DRAIN MAST
The directors receive signals from the drain mast
control unit via type B DEUs.
If the drain mast heater or the control unit fails the
CIDS CAUTION light on the FAP comes on.
ATTND AND PANEL
One Attendant Indication Panel is installed near each
attendant seat for message purposes.
AREA CALL PANEL
One basic and one optional ACP can be connected to
each DEU B.
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CIDS - DIRECTOR/SYSTEM ARCHITECTURE
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SELF EXAMINATION
A break in one top line data bus:
A - Disables all DEUs.
B - Affects only type B DEUs.
C - Only affects the type A DEUs behind the
crack on this bus.
The Area Call Panel (ACP) is connected to:
A - The directors directly.
B - The type A DEUs.
C - The type B DEUs.
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23 - COMMUNICATIONS
23-73-00 CIDS - DIRECTOR
DESCRIPTION/OPERATION
CONTENTS:
General
Functions
Normal Power Supply
Abnormal Power Supply
Bite
Self Examination
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CIDS - DIRECTOR DESCRIPTION/OPERATION
GENERAL
Two identical directors are installed in the avionics
compartment. A memory module, called the onboard
replaceable module (OBRM) is plugged into the front
of the director.
This solid state memory contains part of the
operational software of the director.
E.g.: a simple exchange of the OBRM can provide system
expansion or software updates.
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CIDS - DIRECTOR DESCRIPTION/OPERATION
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CIDS - DIRECTOR DESCRIPTION/OPERATION
FUNCTIONS
The director is a central control and interface
component of the cabin intercommunication data system.
The current cabin layout and properties of layout
related equiment are stored in the directors.
The director provides the following functions:
- The handling of six data bus lines,
- the transmission of digitized audio signals,
- the transmission of control data and commands,
- the adaptation of received DEU data,
- the control of other C.I.D.S. functional units,
- the forward attendant panel,
- the programming and test panel,
- the data transfer to the passenger
entertainment system,
- the service interphone system,
- the aft attendant panel via DEU B,
- the interface to cockpit and avionics
compartment,
- the handling of cabin systems related inputs
and outputs,
- the control and interface of other system,
- the realization of programming functions,
- the realization of test functions,
- the activation of emergency mode with
minimum power consumption.
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CIDS - DIRECTOR DESCRIPTION/OPERATION - POWER SUPPLY
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CIDS - DIRECTOR DESCRIPTION/OPERATION
NORMAL POWER SUPPLY
The directors are continuously energized when the
essential and service busbar are energized.
In normal operation, the essential busbar supplies:
　
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