SIST EN IEC 62386-101:2023

SLOVENSKI STANDARD
01-februar-2023
Nadomešča:
SIST EN 62386-101:2015
SIST EN 62386-101:2015/A1:2018
Digitalni naslovljivi vmesnik za razsvetljavo - 101. del: Splošne zahteve -
Sistemske komponente (IEC 62386-101:2022)
Digital addressable lighting interface - Part 101: General requirements - System
components (IEC 62386-101:2022)
Digital adressierbare Schnittstelle für die Beleuchtung - Teil 101: Allgemeine
Anforderungen - Systemkomponenten (IEC 62386-101:2022)
Interface d'éclairage adressable numérique - Partie 101: Exigences générales -
Composants de système (IEC 62386-101:2022)
Ta slovenski standard je istoveten z: EN IEC 62386-101:2022
ICS:
29.140.50 Instalacijski sistemi za Lighting installation systems
razsvetljavo
35.200 Vmesniška in povezovalna Interface and interconnection
oprema equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 62386-101

NORME EUROPÉENNE
EUROPÄISCHE NORM December 2022
ICS 29.140.50; 29.140.99 Supersedes EN 62386-101:2014;
EN 62386-101:2014/A1:2018
English Version
Digital addressable lighting interface - Part 101: General
requirements - System components
(IEC 62386-101:2022)
Interface d'éclairage adressable numérique - Partie 101: Digital adressierbare Schnittstelle für die Beleuchtung - Teil
Exigences générales - Composants de système 101: Allgemeine Anforderungen - Systemkomponenten
(IEC 62386-101:2022) (IEC 62386-101:2022)
This European Standard was approved by CENELEC on 2022-12-21. CENELEC 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 CENELEC 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 CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 62386-101:2022 E

European foreword
The text of document 34/947/FDIS, future edition 3 of IEC 62386-101, prepared by IEC/TC 34
"Lighting" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2023-09-21
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2025-12-21
document have to be withdrawn
This document supersedes EN 62386-101:2014 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 62386-101:2022 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
CISPR 15 NOTE Harmonized as EN IEC 55015
IEC 60598-1:2020 NOTE Harmonized as EN IEC 60598-1:2021 (not modified) +A11:2022
IEC 61347 (series) NOTE Harmonized as EN 61347 (series)
IEC 61547 NOTE Harmonized as EN 61547
IEC 63044 (series) NOTE Harmonized as EN IEC 63044 (series)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the
relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 61347-1 2015 Lamp controlgear - Part 1: General and EN 61347-1 2015
safety requirements
+ A1 2017  + A1 2021
IEC 62386-102 2022 Digital addressable lighting interface - Part - -
102: General requirements - Control gear
IEC 62386-103 2022 Digital addressable lighting interface - Part - -
103: General requirements - Control
devices
IEC 62386-104 - Digital addressable lighting interface - Part EN IEC 62386-104 -
104: General requirements - Wireless and
alternative wired system components
IEC 62386-105 - Digital addressable lighting interface - Part EN IEC 62386-105 -
105: Particular requirements for control
gear and control devices - Firmware
Transfer
IEC 62386-2XX series Digital addressable lighting interface - Part EN 62386-2XX series
2XX: Particular requirements for control
gear
IEC 62386-3XX series Digital addressable lighting interface - Part EN 62386-3XX series
3XX: Particular requirements for control
devices
IEC 61000-4-11 - Electromagnetic compatibility (EMC) - Part EN IEC 61000-4-11 -
4-11: Testing and measurement
techniques - Voltage dips, short
interruptions and voltage variations
immunity tests for equipment with input
current up to 16 A per phase
IEC 60664-1 - Insulation coordination for equipment EN IEC 60664-1 -
within low-voltage supply systems - Part 1:
Principles, requirements and tests
IEC 60990 2016 Methods of measurement of touch current EN 60990 2016
and protective conductor current
IEC 61643-11 - Low-voltage surge protective devices - Part EN 61643-11 -
11: Surge protective devices connected to
low-voltage power systems - Requirements
and test methods
IEC 62386-101 ®
Edition 3.0 2022-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Digital addressable lighting interface –

Part 101: General requirements – System components

Interface d'éclairage adressable numérique –

Partie 101: Exigences générales – Composants de système

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.140.50; 29.140.99 ISBN 978-2-8322-5964-1

– 2 – IEC 62386-101:2022 © IEC 2022
CONTENTS
FOREWORD . 7
INTRODUCTION . 9
1 Scope . 10
2 Normative references . 10
3 Terms and definitions . 11
4 General . 16
4.1 Purpose . 16
4.2 Version number . 16
4.3 System structure and architecture . 16
4.4 System information flow . 17
4.5 Command types . 17
4.6 Bus units . 18
4.6.1 Transmitters and receivers in bus units . 18
4.6.2 Control gear . 18
4.6.3 Input device . 18
4.6.4 Single-master application controller . 19
4.6.5 Multi-master application controller . 19
4.6.6 Sharing an interface . 19
4.6.7 Power for operation . 20
4.7 Bus power supply and load calculations . 21
4.7.1 Current demand coverage . 21
4.7.2 Maximum signal current compliance . 21
4.7.3 Simplified system calculation . 21
4.8 Wiring . 21
4.8.1 Wiring structure . 21
4.8.2 Wiring specification . 21
4.9 Electrical safety requirements . 22
4.9.1 General . 22
4.9.2 Insulation . 22
4.9.3 Electric strength . 22
4.9.4 Limitation of the touch current from the device to the bus . 22
4.10 Earthing of the bus . 23
4.11 Power interruptions at bus units . 23
4.11.1 Different levels of power interruptions . 23
4.11.2 Short power interruptions of external power supply . 23
4.11.3 External power cycle . 24
4.11.4 Short interruptions of bus power supply . 24
4.11.5 Bus power down . 24
4.11.6 System start-up timing . 24
5 Electrical specification . 26
5.1 General . 26
5.2 Marking of the interface . 26
5.3 Capacitors between the interface and earth . 26
5.4 Signal voltage rating . 26
5.5 Signal current rating. 27
5.6 Marking of bus powered bus unit . 27

IEC 62386-101:2022 © IEC 2022 – 3 –
5.7 Signal rise time and fall time . 28
6 Bus power supply . 29
6.1 General . 29
6.2 Marking of the bus power supply terminals . 29
6.3 Capacitors between the interface and earth . 29
6.4 Voltage rating . 29
6.5 Current rating. 30
6.5.1 General current rating . 30
6.5.2 Single bus power supply current rating . 30
6.5.3 Integrated bus power supply current rating . 30
6.5.4 Dynamic behaviour of the bus power supply . 30
6.6 Bus power supply timing requirements . 32
6.6.1 Short power supply interruptions . 32
6.6.2 Short circuit behaviour . 32
7 Transmission protocol structure . 33
7.1 General . 33
7.2 Bit encoding . 33
7.2.1 Start bit and data bit encoding . 33
7.2.2 Stop condition encoding . 33
7.3 Frame description . 33
7.4 Frame types . 34
7.4.1 16-bit forward frame . 34
7.4.2 24-bit forward frame . 34
7.4.3 32-bit forward frame . 34
7.4.4 Reserved forward frame . 34
7.4.5 Backward frame . 34
7.4.6 Proprietary forward frames . 34
8 Timing . 35
8.1 Single-master transmitter timing . 35
8.1.1 Single-master transmitter bit timing. 35
8.1.2 Single-master transmitter frame sequence timing . 35
8.2 Receiver timing . 36
8.2.1 Receiver bit timing . 36
8.2.2 Receiver bit timing violation . 37
8.2.3 Receiver frame size violation . 38
8.2.4 Receiver frame sequence timing . 38
8.2.5 Reception of backward frames . 38
8.3 Multi-master transmitter timing . 39
8.3.1 Multi-master transmitter bit timing . 39
8.3.2 Multi-master transmitter frame sequence timing . 39
9 Method of operation . 40
9.1 Dealing with frames and commands . 40
9.1.1 General . 40
9.1.2 Frame received or rejected . 41
9.1.3 Frame accepted or ignored . 41
9.1.4 Command accepted or ignored . 41
9.1.5 Command executed or discarded . 41
9.2 Collision avoidance, collision detection and collision recovery . 42

– 4 – IEC 62386-101:2022 © IEC 2022
9.2.1 General . 42
9.2.2 Collision avoidance . 42
9.2.3 Collision detection . 42
9.2.4 Collision recovery . 44
9.3 Transactions . 45
9.4 Send-twice forward frames and send-twice commands . 45
9.5 Command iteration . 46
9.6 Usage of a shared interface . 46
9.6.1 General . 46
9.6.2 Backward frames . 47
9.6.3 Forward frames . 47
9.7 Use of multiple bus power supplies . 47
10 Declaration of variables . 47
11 Definition of commands . 47
Annex A (informative) Background information for systems . 48
A.1 Wiring information . 48
A.2 System architectures . 49
A.2.1 General . 49
A.2.2 Single-master architecture . 49
A.2.3 Multi-master architecture with one application controller . 50
A.2.4 Multi-master architecture with more than one application controller . 51
A.2.5 Multi-master architecture with integrated input device . 52
A.2.6 Multi-master architecture with integrated input device and power supply. 53
A.3 Collision detection . 54
A.4 Timing definition explanations . 55
A.4.1 General . 55
A.4.2 Receiver timing . 55
A.4.3 Transmitter timing . 55
A.4.4 Grey areas . 56
A.5 Maximum current consumption calculation explanation . 56
A.5.1 Single bus power supply . 56
A.5.2 Multiple bus power supplies . 57
A.5.3 Redundant bus power supplies . 58
A.6 Communication layer overview . 59
A.6.1 General . 59
A.6.2 Physical layer . 60
A.6.3 Data link layer . 60
A.6.4 Network layer . 60
A.6.5 Transport layer . 60
A.6.6 Session layer . 60
A.6.7 Presentation layer . 60
A.6.8 Application layer . 60
A.7 Effects of combining version number 1 and version number 2.y devices . 60
Annex B (informative) Touch current . 62
Bibliography . 63

Figure 1 – IEC 62386 graphical overview . 9
Figure 2 – System structure example . 17

IEC 62386-101:2022 © IEC 2022 – 5 –
Figure 3 – Communication between bus units (example) . 17
Figure 4 – Example of a shared interface . 20
Figure 5 – Start-up timing example . 25
Figure 6 – Maximum signal rise and fall time measurements . 28
Figure 7 – Minimum signal rise and fall time measurements . 29
Figure 8 – Bus power supply current behaviour . 31
Figure 9 – Bus power supply voltage behaviour . 32
Figure 10 – Frame example . 33
Figure 11 – Bi-phase encoded bits . 33
Figure 12 – Bit timing example . 35
Figure 13 – Settling time illustration . 35
Figure 14 – Receiver timing decision example . 37
Figure 15 – Dealing with frames and commands . 41
Figure 16 – Collision detection timing decision example . 44
Figure 17 – Collision recovery example . 45
Figure A.1 – Single-master architecture example . 50
Figure A.2 – Multi-master architecture example with one application controller . 51
Figure A.3 – Multi-master architecture example with two application controllers . 52
Figure A.4 – Multi-master architecture example with integrated input device . 53
Figure A.5 – Multi-master architecture example with integrated input device and bus
power supply . 54
Figure A.6 – Collision detection timing diagram. 55
Figure A.7 – Transmitter and receiver timing illustration . 56
Figure A.8 – Bus power supply current values. 57
Figure A.9 – Current demand coverage . 57
Figure A.10 – Combination of four bus power supplies . 58
Figure A.11 – Redundant bus power supplies . 58
Figure B.1 – Touch current from a bus unit . 62
Figure B.2 – Summation of touch currents from several bus units . 62

Table 1 – System components . 16
Table 2 – Transmitters and receivers in bus units . 18
Table 3 – Power-interruption timing of external power . 23
Table 4 – Power-interruption timing of bus power . 23
Table 5 – Short power interruptions . 24
Table 6 – Start-up timing. 25
Table 7 – System voltage levels . 26
Table 8 – Receiver voltage levels . 27
Table 9 – Transmitter voltage levels . 27
Table 10 – Current rating . 27
Table 11 – Signal rise and fall times . 28
Table 12 – Bus power supply output voltage . 30
Table 13 – Bus power supply current rating . 30

– 6 – IEC 62386-101:2022 © IEC 2022
Table 14 – Bus power supply dynamic behaviour . 31
Table 15 – Short circuit timing behaviour . 32
Table 16 – Transmitter bit timing . 35
Table 17 – Transmitter settling time values . 36
Table 18 – Receiver timing starting at the beginning of a logical bit . 37
Table 19 – Receiver timing starting at an edge inside of a logical bit . 37
Table 20 – Receiver settling time values . 38
Table 21 – Multi-master transmitter bit timing. 39
Table 22 – Multi-master transmitter settling time values . 40
Table 23 – Checking a logical bit, starting at an edge at the beginning of the bit . 43
Table 24 – Checking a logical bit, starting at an edge inside the bit . 43
Table 25 – Collision recovery timing . 44
Table 26 – Transmitter command iteration timing . 46
Table 27 – Receiver command iteration timing . 46
Table A.1 – Maximum cable length . 49
Table A.2 – OSI layer model of the IEC 62386 series . 59
Table A.3 – Effects of combining version number 1 and version number 2.y devices . 61

IEC 62386-101:2022 © IEC 2022 – 7 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DIGITAL ADDRESSABLE LIGHTING INTERFACE –

Part 101: General requirements –
System components
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC
Publication(s)"). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
IEC 62386-101 has been prepared by IEC technical committee 34: Lighting. It is an
International Standard.
This third edition cancels and replaces the second edition published in 2014 and
Amendment 1:2018. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) the scope has been updated;
b) safety and earthing have been updated and extended;
c) references have been updated;
d) the use of bus-power and external-power has been clarified;
e) polarity sensitivity for bus units including a bus power supply has been updated;

– 8 – IEC 62386-101:2022 © IEC 2022
f) frame sizes of 32 bits are no longer reserved.
The text of this International Standard is based on the following documents:
Draft Report on voting
34/947/FDIS 34/988/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement,
available at www.iec.ch/members_experts/refdocs. The main document types developed by
IEC are described in greater detail at www.iec.ch/standardsdev/publications.
This Part 101 of IEC 62386 is intended to be used in conjunction with:
• Part 102, which contains general requirements for the relevant product type (control gear),
and with the appropriate Part 2xx (particular requirements for control gear);
• Part 103, which contains general requirements for the relevant product type (control
devices), and the appropriate Part 3xx (particular requirements for control devices);
• Part 104, which contains general requirements for wireless and alternative wired system
components;
• Part 105, which contains particular requirements for firmware transfer for control gear and
control devices.
A list of all parts in the IEC 62386 series, published under the general title Digital addressable
lighting interface, can be found on the IEC website
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The "colour inside" logo on the cover page of this document indicates that it
contains colours which are considered to be useful for the correct understanding of its
contents. Users should therefore print this document using a colour printer.

IEC 62386-101:2022 © IEC 2022 – 9 –
INTRODUCTION
IEC 62386 contains several parts, referred to as series. The IEC 62386 series specifies a bus
system for control by digital signals of electronic lighting equipment. The IEC 62386-1xx
series includes the basic specifications. Part 101 contains general requirements for system
components, Part 102 extends this information with general requirements for control gear and
Part 103 extends it further with general requirements for control devices. Parts 104 and 105
can be applied to control gear or control devices. Part 104 gives requirements for wireless
and alternative wired system components. Part 105 describes firmware transfer. Part 150
gives requirements for an auxiliary power supply which can be stand-alone, or built into
control gear or control devices.
The IEC 62386-2xx series extends the general requirements for control gear with lamp
specific extensions (mainly for backward compatibility with Edition 1 of IEC 62386) and with
control gear specific features.
The IEC 62386-3xx series extends the general requirements for control devices with input
device specific extensions describing the instance types as well as some common features
that can be combined with multiple instance types.
This third edition of IEC 62386-101 is intended to be used in conjunction with IEC 62386-102
and with the various parts that make up the IEC 62386-2xx series for control gear, together
with IEC 62386-103 and the various parts that make up the IEC 62386-3xx series of particular
requirements for control devices. The division into separately published parts provides for
ease of future amendments and revisions. Additional requirements will be added as and when
a need for them is recognized.
The setup of the standards is graphically represented in Figure 1 below.

Figure 1 – IEC 62386 graphical overview
When this part of IEC 62386 refers to any of the clauses of the other parts of the
IEC 62386-1xx series, the extent to which such a clause is applicable is specified. The other
parts also include additional requirements, as necessary.
All numbers used in this document are decimal numbers unless otherwise noted. Hexadecimal
numbers are given in the format 0xVV, where VV is the value. Binary numbers are given in
the format XXXXXXXXb or in the format XXXX XXXX, where X is 0 or 1, "x" in binary numbers
means "don't care".
– 10 – IEC 62386-101:2022 © IEC 2022
DIGITAL ADDRESSABLE LIGHTING INTERFACE –

Part 101: General requirements –
System components
1 Scope
This part of IEC 62386 is applicable to system components in a bus system for control by
digital signals of electronic lighting equipment.
The control methods, algorithms and data exchange methods of application controllers used
for lighting control are not within the scope of the IEC 62386 series. EMC requirements are
not within the scope of the IEC 62386 series.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements 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.
IEC 61347-1:2015, Lamp controlgear – Part 1: General and safety requirements
IEC 61347-1:2015/AMD1:2017
IEC 62386-102:2022, Digital addressable lighting interface – Part 102: General requirements
– Control gear
IEC 62386-103:2022, Digital addressable lighting interface – Part 103: General requirements
– Control devices
IEC 62386-104, Digital addressable lighting interface – Part 104: General requirements –
Wireless and alternative wired system components
IEC 62386-105, Digital addressable lighting interface – Part 105: Particular requirements for
control gear and control devices – Firmware Transfer
IEC 62386-2xx (all parts), Digital addressable lighting interface – Part 2xx: Particular
requirements for control gear
IEC 62386-3xx (all parts), Digital addressable lighting interface – Part 3xx: Particular
requirements for control devices
IEC 61000-4-11, Electromagnetic compatibility (EMC) – Part 4-11:Testing and measurement
techniques – Voltage dips, short interruptions and voltage variations immunity tests for
equipment with input current up to 16 A per phase
IEC 60664-1, Insulation coordination for equipment within low-voltage supply systems –
Part 1: Principles, requirements and tests
IEC 60990:2016, Methods of measurement of touch current and protective conductor current

IEC 62386-101:2022 © IEC 2022 – 11 –
IEC 61643-11, Low-voltage surge protective devices – Part 11: Surge protective devices
connected to low-voltage power systems – Requirements and test methods
3 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 http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
active state
phase of low level voltage during a transmission
Note 1 to entry: Noise and short pulses may be ignored and therefore do not change the state.
3.2
advanced bus power supply
bus power supply capable of checking the bus for fault conditions before switching on its
output continuously
Note 1 to entry: Exam
...