EN 4660-001:2011

SLOVENSKI STANDARD
01-december-2011
Aeronavtika - Modularne in odprte letalske elektronske arhitekture - 001. del:
Arhitektura
Aerospace series - Modular and Open Avionics Architectures - Part 001: Architecture
Luft- und Raumfahrt - Modulare und offene Avionikarchitekturen - Teil 001: Architektur
Série aérospatiale - Architectures Avioniques Modulaires et Ouvertes - Partie 001:
Architecture
Ta slovenski standard je istoveten z: EN 4660-001:2011
ICS:
49.090 2SUHPDLQLQVWUXPHQWLY On-board equipment and
]UDþQLKLQYHVROMVNLKSORYLOLK instruments
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 4660-001
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2011
ICS 49.090
English Version
Aerospace series - Modular and Open Avionics Architectures -
Part 001: Architecture
Série aérospatiale - Architectures Avioniques Modulaires et Luft- und Raumfahrt - Modulare und offene
Ouvertes - Partie 001: Architecture Avionikarchitekturen - Teil 001: Architektur
This European Standard was approved by CEN on 26 June 2010.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same
status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2011 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 4660-001:2011: E
worldwide for CEN national Members.

Contents Page
Foreword .4
0 Introduction .4
0.1 Purpose .5
0.2 Document Structure .6
1 Scope .7
2 Normative references .7
3 Terms, definitions and abbreviations .7
3.1 Terms and definitions .7
3.2 Abbreviations .8
3.3 Definitions .9
4 IMA Drivers and Characteristics .9
4.1 Drivers .9
4.2 Introduction to IMA Concepts . 10
4.2.1 Non-IMA Systems . 10
4.2.2 Characteristics for an IMA System . 11
4.2.3 IMA System Design. 11
5 Requirements and the Architecture Standard . 13
5.1 Software Architecture . 13
5.2 Common Functional Module . 15
5.3 Communication / Network . 15
5.4 Packaging . 16
6 Guidelines . 16
6.1 System Management . 17
6.2 Fault Management . 17
6.3 System initialisation and shutdown. 17
6.4 System Configuration / reconfiguration . 18
6.5 Time Management. 18
6.6 Security Aspects . 18
6.7 Safety . 19
Annex A (informative) Power Distribution Architecture . 20
A.1 General Description . 20
A.2 The Double Conversion Architecture . 20
A.3 The Line Replaceable Chamber . 21

Table of Figures Page
Figure 1 — ASAAC Standard Documentation Hierarchy . 5
Figure 2 — A Typical Federated Aircraft System . 10
Figure 3 — IMA Core System . 12
Figure 4 — IMA System . 12
Figure 5 — An IMA System . 13
Figure 6 — Three Layer Software Architecture . 14
Figure A.1 — Double Conversion Architecture . 20

Table of Tables Page
Table 1 — Architectural Characteristics . 11
Table 2 — Software Layer Independence . 14

Foreword
This document (EN 4660-001:2011) has been prepared by the Aerospace and Defence Industries Association
of Europe - Standardization (ASD-STAN).
After enquiries and votes carried out in accordance with the rules of this Association, this Standard has
received the approval of the National Associations and the Official Services of the member countries of ASD,
prior to its presentation to CEN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by August 2011, and conflicting national standards shall be withdrawn at
the latest by August 2011.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.

0 Introduction
0.1 Purpose
This document was produced under the ASAAC Phase II Contract.
The purpose of the ASAAC Programme is to define and validate a set of open architecture standards,
concepts and guidelines for Advanced Avionics Architectures (A3) in order to meet the three main ASAAC
drivers. The standards, concepts and guidelines produced by the Programme are to be applicable to both new
aircraft and update programmes.
The three main drivers for the ASAAC Programme are:
 Reduced life cycle costs,
 Improved mission performance,
 Improved operational performance.
The Standards are organised as a set of documents including:
 A set of agreed standards that describe, using a top down approach, the Architecture overview to all
interfaces required to implement the core within avionics systems,
 The guidelines for system implementation through application of the standards.
The document hierarchy is given hereafter: (in this figure, the current document is highlighted)
Standards for Architecture
Standards for Software Guidelines for System Issues
System Management
−
Fault Management
−
− Initialisation / Shutdown
− Configuration / Reconfiguration
Standards for Packaging
− Time Management
− Security
− Safety
Standards for Communications and
Network
Standards for Common Functional Modules

Figure 1 — ASAAC Standard Documentation Hierarchy
0.2 Document Structure
The document contains the following clauses:
Clause 1, gives the scope of the document,
Clause 2, identifies normative references,
Clause 3, gives the terms, definitions and abbreviations,
Clause 4, presents the set of architecture drivers and characteristics as well as an introduction to IMA,
Clause 5, defines the architecture standard, and introduces the other standards,
Clause 6, introduces the guidelines for implementing an IMA architecture,
Annex A, presents the power supply architecture.
1 Scope
The purpose of this standard is to establish uniform requirements for the architecture for Integrated Modular
Avionic (IMA) systems as defined by the ASAAC Programme.
The IMA architecture can be built by using common components. These components are specified in separate
standards. Ways of using these components are described in a set of guidelines. This document gives
references to these Standards and Guidelines as well as a short introduction to IMA.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
EN 4660-002, Aerospace series — Modular and Open Avionics Architectures — Part 002: Common
Functional Modules
EN 4660-003, Aerospace series — Modular and Open Avionics Architectures — Part 003:
Communications/Network
EN 4660-004, Aerospace series — Modular and Open Avionics Architectures — Part 004: Packaging
EN 4660-005, Aerospace series — Modular and Open Avionics Architectures — Part 005: Software
1)
ASAAC2-GUI-32450-001-CPG Issue 01, Final Draft of Guidelines for System Issues
— Volume 1 — System Management.
— Volume 2 — Fault Management.
— Volume 3 — Initialisation and Shutdown.
— Volume 4 — Configuration / Reconfiguration.
— Volume 5 — Time Management.
— Volume 6 — Security.
— Volume 7 — Safety.
3 Terms, definitions and abbreviations
3.1 Terms and definitions
Use of “shall”, “should” and “may” within the standards observe the following rules:
 The word SHALL in the text expresses a mandatory requirement of the standard.

1) Published by: Allied Standard Avionics Architecture Council.
 The word SHOULD in the text expresses a recommendation or advice on implementing
...