ISO 11892:2024

ISO TC 20/SC 14
ISO/FDIS 11892:2024(E)
ISO/TC 20/SC 14
Secretariat: ANSI/AIAA
Second edition
Date: 2024-03-2004-15
Space systems — Subsystems or units to spacecraft interface
control document
Systèmes spatiaux — Document de contrôle des interfaces entre les sous-systèmes ou unités et le véhicule
spatial
Copyright notice
ThisFDIS stage
ISO/FDIS 11892:2023(E2024(en)
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Published in Switzerland
iii
ISO/FDIS 11892:2023(E2024(en)
Contents Page
Foreword . v
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and abbreviated terms . 1
3.1 Terms and definitions . 1
3.2 Abbreviated terms . 4
4 Subsystem to spacecraft ICD . 4
4.1 General . 4
4.2 Cover sheet . 6
4.2.1 Title and document number . 6
4.2.2 Revision record. 6
4.2.3 Table of contents . 7
4.3 Applicability . 7
4.4 List of units . 7
4.5 Subsystem block diagram . 7
4.6 Subsystem grounding diagram . 7
4.7 Subsystem operational mode definition (if applicable) . 8
4.8 Unit ICD (if applicable) . 8
4.9 Co-axial cable or waveguide ICD (if applicable) . 8
4.10 Wire harness ICD (if applicable) . 8
5 Unit ICD in detail . 8
5.1 General . 8
5.2 Cover sheet . 9
5.2.1 Title and document number . 9
5.2.2 Revision record. 9
5.2.3 Table of contents . 9
5.3 Interface data sheet (IDS) . 10
5.4 Pin assignment table. 14
5.5 Telemetry command list . 14
5.6 Input/output circuits . 15
5.7 Grounding diagram . 15
5.8 Outline drawing . 15
5.9 Three-dimensional CAD model (if applicable) . 16
5.10 Non-removal test items (if applicable) . 16
5.11 Related technical documents (if applicable) . 16
Bibliography . 17

iv © ISO 2023 – All rights reserved
iv
ISO/FDIS 11892:2023(E2024(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types of
ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent rights
in respect thereof. As of the date of publication of this document, ISO had not received notice of (a) patent(s)
which may be required to implement this document. However, implementers are cautioned that this may not
represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles, Subcommittee
SC 14, Space systems and operations.
This second edition cancels and replaces the first edition (ISO 11892:2012), which has been technically
revised.
The main change is as follows:
— — Removed clause removed Clause 6 “Verification””.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
v
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 11892:2024(E)

Space systems — Subsystems or units to spacecraft interface control
document
1 Scope
This document provides space system manufacturing organizations with the minimum interface related items
and generic format for creating the interface control document (ICD) which subsystems or units suppliers
prepare for spacecraft systems (SC) integrators.
In this document, ICD is not defined to contain descriptions regarding various properties of subsystems or
units or tasks to be done by suppliers, i.e. performance, functions, endurance to launch mechanical
environment, or quality assurance provisions. Such descriptions are presumed to be defined in other
contractual documents such as technical specifications.
2 Normative references
There are no normative references in this document.
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— — IEC Electropedia: available at https://www.electropedia.org/
— — ISO Online browsing platform: available at https://www.iso.org/obp
3.1.1
subsystem
assembly or group of electrical, thermal and/or mechanical units (3.1.3(3.1.3)) which is dedicated to specific
functions of a spacecraft system (SC)
3.1.2
subsystem to spacecraft ICD
subsystem to spacecraft interface control document
set of documents that defines and controls the electrical, thermal, and mechanical interface requirements
between a subsystem (3.1.1(3.1.1)) and the spacecraft system (SC)
3.1.3
unit
independently handled device at the lowest level of hardware assembly that works with specified complex
electrical, thermal and/or mechanical functions
ISO/FDIS 11892:2024(Een)
subsystem to spacecraft ICD
Note 1 to entry: Several units build up a subsystem (3.1.1(3.1.1).). A single unit may occasionally comprise a subsystem
by itself.
3.1.4
unit to spacecraft ICD
unit to spacecraft interface control document
set of documents that defines and controls the electrical, thermal, and mechanical interface requirements
between a unit (3.1.3(3.1.3)) and the spacecraft system (SC)
Note 1 to entry: Figure 1 Figure 1 illustrates the hierarchy of a space system and the ranges where various interface
control documents are applicable.
2 © ISO 2023 – All rights reserved
ISO/FDIS 11892:2024(Een)
Figure 1 — Hierarchy of a space system and related interface control document (ICD)
ISO/FDIS 11892:2024(Een)
3.2 Abbreviated terms
CAD computer aided design
ICD interface control document
IDS interface data sheet
MOI moment of inertia
RF radio frequency
RLC resistor (R), inductor (L), and capacitor (C)
4 Subsystem to spacecraft ICD
4.1 General
A subsystem ICD is a package constructed of sub-documents as shown in Table 1Table 1. It shall contain
configuration control information, subsystem definition diagrams, and if applicable, co-axial cable or
waveguide or wire harness in the subsystem. An individual ICD of each unit in the subsystem is normally a
separate document. However, it may be contained as part of the subsystem ICD.
Layered construction of a subsystem ICD package is illustrated in Figure 2Figure 2.
Table 1 — Construction of subsystem to spacecraft ICD package
No Title Description
(Subclause)
1 Cover sheet (with title and document number, revision record 4.24.2
and table of contents)
2 Applicability 4.34.3
3 List of units 4.44.4
4 Subsystem block diagram 4.54.5
5 Subsystem grounding diagram 4.64.6
6 Subsystem operational mode definition (if applicable) 4.74.7
7 Unit ICD (if applicable) 4.84.8
8 Co-axial cable or waveguide ICD (if applicable) 4.94.9
9 Wire harness ICD (if applicable) 4.104.10
4 © ISO 2023 – All rights reserved
ISO/FDIS 11892:2024(Een)
ISO/FDIS 11892:2024(Een)
a
The individual ICD of each unit may be contained as a part of the subsystem ICD.
Figure 2 — Layered construction of subsystem ICD package
4.2 Cover sheet
4.2.1 Title and document number
The cover sheet of the subsystem ICD shall contain the following items:
— — title of the subsystem ICD package;
— — document number of the ICD package;
— — issue date;
— — issuing organization.
4.2.2 Revision record
The revision record shall contain the following items:
— — revision number;
— — revision date;
6 © ISO 2023 – All rights reserved
ISO/FDIS 11892:2024(Een)
— — summary of revision contents;
— — authorization.
4.2.3 Table of contents
The table of contents shall indicate the name, document number and revision number of the following sub-
documents which build up the subsystem ICD:
— — list of units;
— — subsystem block diagram;
— — subsystem grounding diagram;
— — subsystem operational mode definition (if applicable);
— — unit ICD (if applicable);
— — co-axial cable or waveguide ICD (if applicable);
— — wire harness ICD (if applicable);
— — non-removal test items (if applicable).
4.3 Applicability
The following information shall be addressed in the ICD:
— — applicable documents;
— — definitions;
— — physical units.
4.4 List of units
The list of units shall contain all units included in the subsystem, including the co-axial cable or waveguide
and/or wire harness provided to the spacecraft system by the subsystem organization. The list of units shall
include the document number and revision record of each unit ICD if it is a separate document.
4.5 Subsystem block diagram
The subsystem block diagram shall graphically indicate the connection and relationship of all of the units
included in the subsystem. The subsystem block diagram shall also show the connection and relationship
between the subsyst
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