IEC 62386-251:2023

IEC 62386-251
®

Edition 1.0 2023-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside


Digital addressable lighting interface –
Part 251: Particular requirements – Memory bank 1 extension (device type 50)

Interface d'éclairage adressable numérique –
Partie 251: Exigences particulières – Extension du bloc de mémoire 1 (type de
dispositif 50)
IEC 62386-251:2023-04(en-fr)

---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2023 IEC, Geneva, Switzerland

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.


Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite ni
utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et
les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Secretariat Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland

About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch
The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the
variety of criteria (reference number, text, technical publications previews. With a subscription you will always have
committee, …). It also gives information on projects, replaced access to up to date content tailored to your needs.
and withdrawn publications.

Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 300 terminological entries in English
details all new publications released. Available online and once
and French, with equivalent terms in 19 additional languages.
a month by email.
Also known as the International Electrotechnical Vocabulary

(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc


If you wish to give us your feedback on this publication or need
further assistance, please contact the Customer Service
Centre: sales@iec.ch.


A propos de l'IEC
La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des
Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC
Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la
plus récente, un corrigendum ou amendement peut avoir été publié.

Recherche de publications IEC -  IEC Products & Services Portal - products.iec.ch
webstore.iec.ch/advsearchform Découvrez notre puissant moteur de recherche et consultez
La recherche avancée permet de trouver des publications IEC gratuitement tous les aperçus des publications. Avec un
en utilisant différents critères (numéro de référence, texte, abonnement, vous aurez toujours accès à un contenu à jour
comité d’études, …). Elle donne aussi des informations sur les adapté à vos besoins.
projets et les publications remplacées ou retirées.

Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
Le premier dictionnaire d'électrotechnologie en ligne au monde,
Restez informé sur les nouvelles publications IEC. Just
avec plus de 22 300 articles terminologiques en anglais et en
Published détaille les nouvelles publications parues.
français, ainsi que les termes équivalents dans 19 langues
Disponible en ligne et une fois par mois par email.
additionnelles. Egalement appelé Vocabulaire

Electrotechnique International (IEV) en ligne.
Service Clients - webstore.iec.ch/csc

Si vous désirez nous donner des commentaires sur cette
publication ou si vous avez des questions contactez-nous:
sales@iec.ch.

---------------------- Page: 2 ----------------------
IEC 62386-251

®


Edition 1.0 2023-04




INTERNATIONAL



STANDARD




NORME


INTERNATIONALE
colour

inside










Digital addressable lighting interface –

Part 251: Particular requirements – Memory bank 1 extension (device type 50)



Interface d'éclairage adressable numérique –

Partie 251: Exigences particulières – Extension du bloc de mémoire 1 (type de

dispositif 50)














INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE





ICS 29.140.50, 29.140.99 ISBN 978-2-8322-6783-7




Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

---------------------- Page: 3 ----------------------
– 2 – IEC 62386-251:2023  IEC 2023
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 General . 7
4.1 General . 7
4.2 Version number . 7
5 Electrical specification . 8
6 Bus power supply . 8
7 Transmission protocol structure . 8
8 Timing . 8
9 Method of operation . 8
9.1 General . 8
9.2 Memory banks . 8
9.2.1 General . 8
9.2.2 Memory bank writing . 8
9.2.3 Memory bank 1 . 8
10 Declaration of variables . 10
11 Definition of commands . 11
11.1 General . 11
11.2 Overview sheets . 11
11.3 Application extended commands . 11
11.4 Special commands . 11
11.4.1 General . 11
11.4.2 ENABLE DEVICE TYPE (data) . 11

Figure 1 – IEC 62386 graphical overview . 5

Table 1 – Memory bank 1, luminaire information . 9
Table 2 – Declaration of variables . 10
Table 3 – Definition of commands . 11

---------------------- Page: 4 ----------------------
IEC 62386-251:2023  IEC 2023 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

DIGITAL ADDRESSABLE LIGHTING INTERFACE –

Part 251: Particular requirements –
Memory bank 1 extension (device type 50)

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 62386-251 has been prepared by IEC technical committee 34: Lighting. It is an International
Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
34/1019/FDIS 34/1040/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.

---------------------- Page: 5 ----------------------
– 4 – IEC 62386-251:2023  IEC 2023
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 251 of IEC 62386 is intended to be used in conjunction with:
• Part 101, which contains general requirements for system components;
• Part 102, which contains general requirements for control gear.
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.

---------------------- Page: 6 ----------------------
IEC 62386-251:2023  IEC 2023 – 5 –
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. Part 104 and Part 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 first edition of IEC 62386-251 is intended to be used in conjunction with
IEC 62386-101:2022 and IEC 62386-102:2022. The division of IEC 62386 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 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".

---------------------- Page: 7 ----------------------
– 6 – IEC 62386-251:2023  IEC 2023
The following typographic expressions are used:
Variables: "variableName" or "variableName[3:0]", giving only bits 3 to 0 of "variableName";
Range of values: [lowest, highest];
Command: "COMMAND NAME".

---------------------- Page: 8 ----------------------
IEC 62386-251:2023  IEC 2023 – 7 –
DIGITAL ADDRESSABLE LIGHTING INTERFACE –

Part 251: Particular requirements –
Memory bank 1 extension (device type 50)



1 Scope
This part of IEC 62386 specifies an extension to memory bank 1 to enable asset management
functionality. This document builds on the digital addressable lighting interface as specified in
the IEC 62386 series.
This document is only applicable to control gear complying with IEC 62386-102.
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 62386-101:2022, Digital addressable lighting interface – Part 101: General requirements –
System components
IEC 62386-102:2022, Digital addressable lighting interface – Part 102: General requirements –
Control gear
ANSI/IES RP-8-18:2018: American National Standard Recommended Practice for Design and
Maintenance of Roadway and Parking Facility Lighting
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 62386-102 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
4 General
4.1 General
The requirements of IEC 62386-102:2022, Clause 4 apply, with the restrictions, changes and
additions identified below.
4.2 Version number
In IEC 62386-102:2022, 4.2, "102" shall be replaced by "251", "version number" shall be
replaced by "extended version number" and "versionNumber" shall be replaced by
"extendedVersionNumber".

---------------------- Page: 9 ----------------------
– 8 – IEC 62386-251:2023  IEC 2023
5 Electrical specification
The requirements of IEC 62386-102:2022, Clause 5 apply.
6 Bus power supply
The requirements of IEC 62386-102:2022, Clause 6 apply.
7 Transmission protocol structure
The requirements of IEC 62386-102:2022, Clause 7 apply.
8 Timing
The requirements of IEC 62386-102:2022, Clause 8 apply.
9 Method of operation
9.1 General
IEC 62386-102 defines memory bank 1 for basic luminaire information. This document expands
memory bank 1 to enable asset management functionality.
9.2 Memory banks
9.2.1 General
The requirements of IEC 62386-102:2022, 9.10 apply with the following additions and changes.
9.2.2 Memory bank writing
All writable memory locations other than location 0x02 shall be lockable.
For memory bank 1, the permitted range of values for writing is [0, 0xFF], for all locations with
memory type NVM-RW. For memory locations showing a range, values outside of this range
are undefined.
9.2.3 Memory bank 1
Memory bank 1, as shown in Table 1, is reserved for use by an original equipment manufacturer
(OEM), e.g. a luminaire manufacturer, to store additional information about the luminaire, which
has no impact on the functionality of the control gear. The control gear manufacturer shall
implement at least the memory locations up to and including address 0x77.
Memory bank 1 shall be implemented in all logical units and shall be common across all logical
units. A change of value in any location in this bank shall result in the same value in the same
location of this bank in all logical units.

---------------------- Page: 10 ----------------------
IEC 62386-251:2023  IEC 2023 – 9 –
Table 1 – Memory bank 1, luminaire information
a
Address Description Default value Memory type
Reset value
(factory)
0x00 Address of last accessible memory location; Factory burn- No change ROM
in
Range [0x77,0xFE]
0x01 Indicator byte Manufacturer- Manufacturer- Manufacturer-
specific specific specific
b
0x02 Lock byte 0xFF RAM-RW
0xFF
Lockable bytes in the memory bank shall be
read-only while the lock byte has a value different
from 0x55.
[0x03, 0x08] Luminaire manufacturer GTIN 0xFF No change NVM-RW
c
(protectable)
with company prefix to derive manufacturer name
[0x09, 0x10] Luminaire identification number 0xFF No change NVM-RW
c
(protectable)
d
0x11 0x00 No change NVM-RW
Content format ID (MSB)
c
(protectable)
d
0x12 0x03 No change NVM-RW
Content format ID (LSB)
c
(protectable)
0x13 Luminaire year of manufacture [YY] 0xFF No change NVM-RW
c
(protectable)
[0, 99] = YY; [100, MASK] = unknown
0x14 Luminaire week of manufacture [WW] 0xFF No change NVM-RW
c
(protectable)
[1, 53] = WW; 0,[54, MASK] = unknown
0x15 Nominal input power [W] (MSB) 0xFF No change NVM-RW
c
(protectable)
0x16 Nominal input power [W] (LSB); 0xFF No change NVM-RW
c
(protectable)
[0, MASK-1] = power; MASK = unknown
0x17 Power at minimum dim level [W] (MSB) 0xFF No change NVM-RW
c
(protectable)
0x18 Power at minimum dim level [W] (LSB); 0xFF No change NVM-RW
c

(protectable)
[0, MASK-1] = power; MASK = unknown
0x19 Nominal minimum AC mains voltage [V] (MSB) 0xFF No change NVM-RW
c
(protectable)
0x1A Nominal minimum AC mains voltage [V] (LSB); 0xFF No change NVM-RW
c
(protectable)
[90, 480] = voltage;  [0, 89], [481, MASK] =
unknown
0x1B Nominal maximum AC mains voltage [V] (MSB) 0xFF No change NVM-RW
c
(protectable)
0x1C Nominal maximum AC mains voltage [V] (LSB); 0xFF No change NVM-RW
c
(protectable)
[90, 480] = voltage;  [0, 89], [481, MASK] =
unknown
0x1D Nominal light output [Lm] (MSB) 0xFF No change NVM-RW
c
(protectable)
0x1E Nominal light output [Lm] 0xFF No change NVM-RW
c
(protectable)
0x1F Nominal light output [Lm] (LSB); 0xFF No change NVM-RW
c
(protectable)
[0, MASK-1] = light output; MASK = unknown
e
0x20 0xFF No change NVM-RW
CRI
c
(protectable)
[0, 100] = CRI; [101, MASK] = unknown

---------------------- Page: 11 ----------------------
– 10 – IEC 62386-251:2023  IEC 2023
a
Address Description Default value Memory type
Reset value
(factory)
e
0x21 0xFF No change NVM-RW
CCT [K] (MSB)
c
(protectable)
e
0x22 0xFF No change NVM-RW
CCT [K] (LSB)
c

(protectable)
[0, 17 000] = CCT; [17 001, MASK-2], MASK =
unknown; MASK – 1 = Part 209 implemented
0x23 Light distribution Type; 0 = not specified; 0xFF No change NVM-RW
c
(protectable)
1 = Type I; 2 = Type II; 3 = Type III; 4 = Type IV;
5 = Type V; 6 = Type VS; [7, 254] = reserved for
additional types; MASK = unknown
Values in the range [1, 6] shall correspond to the
types defined in ANSI/IES RP-8-18:2018, 2.6.2.
[0x24, 0x3B] Luminaire body colour [24 ASCII character string, 0x00 No change NVM-RW
f c
first character at 0x24] (protectable)
Range [0, MASK]
[0x3C, 0x77] Luminaire identification [60 ASCII character 0x00 No change NVM-RW
f c
string, first character at 0x3C] (protectable)
Range [0, MASK]
[0x78, 0xFE] Manufacturer-specific. Manufcaturer- Manufcaturer- Manufcaturer-
specific specific specific
0xFF Reserved – not implemented Answer NO No change n.a.
Key
LSB least significant byte
MSB most significant byte
a
Reset value after "RESET MEMORY BANK".
b
Also used as power on value.
c
This field is write protectable.
d
Shall be set to 0x0003 when this format is used.
e
Where the luminaire contains multiple control gear, it is recommended this location be configured independently

for each control gear, according to the connected lamps.
f
Null terminated if shorter than the defined length. ASCII = American Standard Code for Information Interchange.

10 Declaration of variables
The requirements of IEC 62386-102:2022, Clause 10 apply, with the following additional
variables for this device type, as shown in Table 2.
Table 2 – Declaration of variables
Variable Default value Reset value Power on value Range of Memory type
(factory) validity
"extendedversionNumber" 2.0 no change no change 00001000b ROM
"deviceType" 50 no change no change 50 ROM

---------------------- Page: 12 ----------------------
IEC 62386-251:2023  IEC 2023 – 11 –
11 Definition of commands
11.1 General
The requirements of IEC 62386-102:2022, Clause 11 apply with the following additions and
changes.
11.2 Overview sheets
Table 3 gives an overview of the application extended commands for this device type.
Unused opcodes of application extended commands shall be reserved for future needs.
Table 3 – Definition of commands
Address
byte
Opcode Command
Command name References
See:
byte reference
IEC 62386-
102, 7.2.2
ENABLE DEVICE TYPE 0xC1 0x32    11.4.2

11.3 Application extended commands
Application extended commands as defined in this document shall be preceded by "ENABLE
DEVICE TYPE (data)" where data equals "deviceType". For device types other than "deviceType"
these commands may be used in a different way.
11.4 Special commands
11.4.1 General
The requirements of IEC 62386-102:2022, 11.7 apply with the following additions.
11.4.2 ENABLE DEVICE TYPE (data)
To enable the command set as defined in this document, data shall be "deviceType".

___________

Selector bit
DTR0
DTR1
DTR2
Answer
Send twice

---------------------- Page: 13 ----------------------
– 12 – IEC 62386-251:2023  IEC 2023
SOMMAIRE
AVANT-PROPOS . 13
INTRODUCTION . 15
1 Domaine d'application . 17
2 Références normatives . 17
3 Termes et définitions . 17
4 Généralités . 17
4.1 Généralités . 17
4.2 Numéro de version . 17
5 Spécifications électriques . 18
6 Alimentation électrique du bus . 18
7 Structure du protocole de transmission . 18
8 Cadencement . 18
9 Méthode de fonctionnement . 18
9.1 Généralités . 18
9.2 Blocs de mémoire . 18
9.2.1 Généralités . 18
9.2.2 Écriture dans le bloc de mémoire . 18
9.2.3 Bloc de mémoire 1 . 18
10 Déclaration des variables . 20
11 Définition des commandes . 21
11.1 Généralités . 21
1
...