ATA 42 IMA & ADCN

A380 TECHNICAL TRAINING MANUAL MANUAL RAMP & SERVICING COURSE - M02 (RR Trent 900) ATA 42 IMA & ADCN

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A380 TECHNICAL TRAINING MANUAL

ATA 42 IMA & ADCN IMA & ADCN Int roduction (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 IMA Presentation (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 ADCN Presentation (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

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RAMP & SERVICING COURSE - M02 (RR Trent 900) ATA 42 IMA & ADCN

TABLE OF CONTENTS

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IMA & ADCN INTRODUCTION (1) General The Integrated Modular Avionics (IMA) and Avionics Data Communication Network (ADCN) supply shared avionics resources and powerful data exchange capability to various A/C systems.

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IMA & ADCN INTRODUCTION (1)

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GENERAL Y A L


IMA & ADCN INTRODUCTION (1)

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IMA PRESENTATION (1) General

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Thanks to the new avionics concept Integrated Modular Avionics Avionics (IMA), most of the conventional LRU functions are done by avionics applications. These independent applications are hosted in shared IMA modules, called Core Processing Input/Output Modules (CPIOMs). As a consequence, IMA concept reduces the maint enance cost due to less spare computers. Each CPIOM integrates new hardware and software technologies and hosts these independent applicatio ns in the same computing and memory resource, and also supplies an Input/Output interface service to some of the conventional avionics. Moreover, in order to satisfy the high demand of conventional avionics, this service capability has been increased thanks to additional IMA modules called Input/Output Modules (IOMs). CPIOMs and IOMs are Line Replaceable Modules (LRMs). These LRMs dialog through the Avionics Data Communication Network (ADCN) by the means of a communication technology developed from a non-aeronautical standard, which has been adapted to aviation constraints. This technology is called Avionics Full DupleX switched ethernet (AFDX). 0 0 0 0 0 A MI 1 P 2 4 M L 0 T 2 0 5 1 L 1 2 5 8 0 Y A L


IMA PRESENTATION (1)

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GENERAL Y A L



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IMA PRESENTATION (1) CPIOM The CPIOM integrates shared processing resource to execute independently its hosted avionics applications. In addition the CPIOM processes independently specific input/output data for each application. This data is an AFDX data when the applications dialog with A/C systems through the ADCN and a non-AFDX data when they dialog directly with conventional LRUs. There are 7 types of CPIOM, each one identified by a letter (A to G): -A: PNEUMATIC+ OPTIONAL AIR CONDITIONING -B: AIR CONDITIONING -C: COCKPIT + FLIGHT CONTROLS -D: DATA DATA LINK -E: ENERGY -F: FUEL -G: LANDING GEAR Each type is associated to a specific part number. CPIOMs with the same part number are interchangeable but may require a software reconfiguration. 1 0 0 0 0 0 A MI 1 P 2 4 M L 0 T 2 0 5 1 L 1 2 5 8 0 Y A L



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CPIOM Y A L



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IMA PRESENTATION (1) IOM The IOM does not host avionics applications. The IOM converts non-AFDX data, coming from conventional LRUs, into AFDX data used within th e Avionics Avionics Data Communication Network (ADCN) and vice versa. There is only one type of IOM identified by the letter A. All IOMs are fully interchangeable.

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IOM Y A L



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ADCN PRESENTATION PRESENTATION (1) General

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On the A380, computers are structured within an Avionics world and an Open world. The Avionics world gathers the aircraft systems supplied within 7 functional areas, related to: -Flight Controls and Auto Flight, -Cockpit, -Engines control, -Energy, -Pneumatic and Cabin, -Fuel, -and Landing Gear. These functional areas group LRUs and/or Line Replaceable Modules (LRMs) that share a common interest or characteristics. The open world hosts mainly avionics, flight operations, communicati on and cabin applications. For security reason, 2 firewalls protect the Avionics world against malicious data coming from open world. Within the avionics world, the A/C systems computers exchange operational and maintenance data. For most of them, this exchange is done through the Avionics Data Communication Network (ADCN). The ADCN supports also data loading operations.

The communication between the ADCN subscribers is done through the AFDX technology. The other LRUs, not including an AFDX interface, are connected to the ADCN through the Input/Output resource of its subscribers.

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The A/C system computers connected directly to the ADCN are the LRMs, which are Core Processing Input/Output Modules (CPIOMs) or Input/Output Modules (IOMs) and the LRUs including an Avionics Full DupleX switched ethernet (AFDX) interface. These computers are called ADCN subscribers. 8

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ADCN PRESENTATION (1)

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GENERAL & ADCN SUBSCRIBERS Y A L



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ADCN PRESENTATION PRESENTATION (1) ADCN & AFDX Technologies

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The ADCN is supported by the AFDX technology. The AFDX is a communication technology based on commercial Ethernet protocol adapted to aeronautical constraint to meet the avionics requirements. It gives the following advantages: -secure and reliable communications, -high data rate 10 and 100 Mb/s. -flexibility for future developments of system architecture, -and less wiring, The ADCN is made of AFDX switches and AFDX cables. The AFDX switches are electronic devices. They manage the data traffic on the network between the connected subscribers. Indeed, the AFDX switches receive data from an ADCN subscriber or from others switches, analyse and route it to one or several appropriate recipients through AFDX cables. The AFDX cable is a Full Duplex physical link between a subscriber and an AFDX switch and between two AFDX switches. The term Full duplex means that the subscriber can simultaneously transmit and receive on the same link. This link is a STAR QUAD cable, composed of four wires uniformly twisted, one pair for transmission and one pair for reception. For availability reasons, the ADCN implements a redundant network. Indeed, all ADCN subscribers have a connection to both redundant networks A and B thanks to the redundant switches. P 2 4 M L 0 T 2 0 5 1 L 1 2 5 8 0 Y A L



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ADCN & AFDX TECHNOLOGIES Y A L



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ADCN PRESENTATION PRESENTATION (1) The ADCN Overview The Avionics Avionics Data Communication Network is composed of 16 switches, 8 per network, and related AFDX cables. These switches interconnect the aircraft systems components: -8 Input Output Modules (IOMs), -22 Core Processing Input Output Modules (CPIOMs), -50 Line Replaceable Units (LRUs) with AFDX interface plus 2 optional. Note that the 22 CPIOMs are classified in 7 types: -4 are in type A, -4 are in type B, -2 are in type C, -2 are in type D, -2 are in type E, -4 are in ty pe F, -4 are in type G. Pairs of superposed switches show the full network redundancy.

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THE ADCN OVERVIEW OVERVIEW Y A L



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AIRBUS S.A.S. 31707 BLAGNAC cedex, FRANCE STM REFERENCE LAY08521 JANUARY 2009 PRINTED IN FRANCE AIRBUS S.A.S. 2009 ALL RIGHTS RESERVED AN EADS COMPANY

ATA 42 IMA & ADCN

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