EN IEC 62386-252:2023

Digital addressable lighting interface - Part 252: Particular requirements - Energy reporting (device type 51)

IEC 62386-252:2023 specifies the information related to energy reporting accessible through memory banks in control gear. This document builds on the digital addressable lighting interface as specified in the IEC 62386 series, by adding specific requirements for data exchange. This document is only applicable to control gear complying with IEC 62386-102.

Digital adressierbare Schnittstelle für die Beleuchtung - Teil 252: Besondere Anforderungen - Energieberichterstattung (Gerätetyp 51)

Interface d'éclairage adressable numérique - Partie 252: Exigences particulières - Collecte des données d'énergie (type de dispositif 51)

L'IEC 62386-252:2023 spécifie les informations relatives à la collecte des données d'énergie, accessibles à partir des blocs de mémoire des appareillages de commande. Le présent document enrichit l'interface d'éclairage adressable numérique spécifiée dans la série IEC 62386, en ajoutant des exigences spécifiques à l'échange de données. Ce document ne s'applique qu'aux appareillages de commande conformes à la norme IEC 62386-102.

Digitalni naslovljivi vmesnik za razsvetljavo - 252. del: Posebne zahteve - Poročanje o energiji (naprava tipa 51) (IEC 62386-252:2023)

Standard IEC 62386-252:2023 določa informacije v zvezi s poročanjem o energiji, ki so dostopne prek pomnilniških bank v krmilni napravi. Ta dokument temelji na digitalno naslovljivem vmesniku za razsvetljavo, kot je določeno v skupini standardov IEC 62386, z dodanimi posebnimi zahtevami za izmenjavo podatkov.
Uporablja se samo za krmilno opremo, ki je skladna s standardom IEC 62386-102.

General Information

• Status: Published
• Publication Date: 18-May-2023
• ICS: 29.140.50 - Lighting installation systems
• ICS: 29.140.99 - Other standards related to lamps
• Technical Committee: CLC/TC 34 - 'Lamps and related equipment
• Drafting Committee: IEC/TC 34 - IEC_TC_34
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 19-May-2023
• Completion Date: 19-May-2023
• Ref Project: SIST EN IEC 62386-252:2023 - Digital addressable lighting interface - Part 252: Particular requirements - Energy Reporting (Device Type 51) (IEC 62386-252:2023)

Overview - EN IEC 62386-252:2023 (Energy reporting, Device Type 51)

EN IEC 62386-252:2023 specifies energy reporting requirements for Digital Addressable Lighting Interface (DALI) control gear classified as device type 51. It defines the data and memory-bank structures through which a control gear exposes energy information (active, apparent and load-side energy/power) and adds device‑level rules for data exchange. This part is intended to be used together with IEC/EN 62386-101 and 62386-102 and applies only to control gear that complies with IEC 62386-102.

Key topics and technical requirements

• Memory banks and variables: Defines memory banks (notably Memory Bank 202, 203 and 204) for storing energy and power values and the declaration of variables used for reporting.
• Energy types: Covers active energy and power (mandatory) and apparent energy/power and load-side energy/power (optional) reporting semantics.
• Accuracy and rounding: Requires specified accuracy, rounding rules for reported values and handling of counter limits to avoid overflow.
• Refresh rate and timing: Specifies refresh/update rates for memory bank values and timing/transport constraints within the DALI transmission protocol.
• Transmission & commands: Adds application-level commands and special commands (for example ENABLE DEVICE TYPE and other reporting/control commands) for energy data access and control.
• Electrical and bus constraints: Addresses power-supply / bus-power considerations for reliable reporting of measurement data.
• Method of operation: Details overall operational behavior, single/multiple logical unit handling and examples of energy flow included in informative annexes.

Practical applications and users

Who uses EN IEC 62386-252:2023:

• Lighting control gear manufacturers implementing standardized energy reporting in luminaires and drivers.
• System integrators and building automation professionals who require interoperable energy data from DALI devices.
• Energy managers, facility operators and auditors who need accurate in-situ energy metrics for monitoring, verification and billing support.
• Test labs and certification bodies validating compliance with IEC 62386 energy-reporting requirements. Practical uses include embedded metering for lighting circuits, performance monitoring, fault detection, energy benchmarking and integration with BMS/EMS platforms.

Related standards

• EN/IEC 62386-101:2022 - General requirements for system components (mandatory companion).
• EN/IEC 62386-102:2022 - General requirements for control gear (this part’s applicability is limited to control gear conforming to Part 102).
• Referenced IEC 62386 family parts for protocol, firmware transfer and auxiliary power where applicable.

Keywords: EN IEC 62386-252:2023, Digital Addressable Lighting Interface, energy reporting, device type 51, DALI energy reporting, control gear, memory banks, active energy, apparent energy, load-side power.

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2023
Digitalni naslovljivi vmesnik za razsvetljavo - 252. del: Posebne zahteve -
Poročanje o energiji (naprava tipa 51) (IEC 62386-252:2023)
Digital addressable lighting interface - Part 252: Particular requirements - Energy
Reporting (Device Type 51) (IEC 62386-252:2023)
Digital adressierbare Schnittstelle für die Beleuchtung - Teil 252: Besondere
Anforderungen - Energieberichterstattung (Gerätetyp 51) (IEC 62386-252:2023)
Interface d'éclairage adressable numérique - Partie 252: Exigences particulières -
Collecte des données d'énergie (type de dispositif 51) (IEC 62386-252:2023)
Ta slovenski standard je istoveten z: EN IEC 62386-252:2023
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 62386-252

NORME EUROPÉENNE
EUROPÄISCHE NORM May 2023
ICS 29.140.50; 29.140.99
English Version
Digital addressable lighting interface - Part 252: Particular
requirements - Energy reporting (device type 51)
(IEC 62386-252:2023)
Interface d'éclairage adressable numérique - Partie 252: Digital adressierbare Schnittstelle für die Beleuchtung - Teil
Exigences particulières - Collecte des données d'énergie 252: Besondere Anforderungen - Energieberichterstattung
(type de dispositif 51) (Gerätetyp 51)
(IEC 62386-252:2023) (IEC 62386-252:2023)
This European Standard was approved by CENELEC on 2023-05-17. 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
© 2023 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 62386-252:2023 E

European foreword
The text of document 34/1020/FDIS, future edition 1 of IEC 62386-252, 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) 2024-02-17
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2026-05-17
document have to be withdrawn
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.
This document is read in conjunction with EN IEC 62386-101 and EN IEC 62386-102.
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 62386-252:2023 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
IEC 62386-202 NOTE Approved as EN IEC 62386-202
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.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 62386-101 2022 Digital addressable lighting interface - Part EN IEC 62386-101 2022
101: General requirements - System
components
IEC 62386-102 2022 Digital addressable lighting interface - Part EN IEC 62386-102 2022
102: General requirements - Control gear

IEC 62386-252 ®
Edition 1.0 2023-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Digital addressable lighting interface –

Part 252: Particular requirements – Energy reporting (device type 51)

Interface d'éclairage adressable numérique –

Partie 252: Exigences particulières – Collecte des données d'énergie (type de

dispositif 51)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.140.50, 29.140.99 ISBN 978-2-8322-6784-4

– 2 – IEC 62386-252:2023  IEC 2023
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 8
4 General . 9
4.1 General . 9
4.2 Version number . 9
5 Electrical specification . 9
6 Bus power supply . 9
7 Transmission protocol structure . 9
8 Timing . 10
9 Method of operation . 10
9.1 General . 10
9.2 Memory banks . 10
9.2.1 General . 10
9.2.2 Accuracy of measurements . 10
9.2.3 Rounding of measurement values . 10
9.2.4 Refresh rate of memory bank values . 10
9.2.5 No overflow of counters . 10
9.2.6 Memory bank 202, active energy and power . 10
9.2.7 Memory bank 203, apparent energy and power . 12
9.2.8 Memory bank 204, load side energy and power . 13
10 Declaration of variables . 15
11 Definition of commands . 15
11.1 General . 15
11.2 Overview sheets . 15
11.3 Application extended commands . 16
11.4 Special commands . 16
11.4.1 General . 16
11.4.2 ENABLE DEVICE TYPE (data) . 16
Annex A (informative) Basic concept of energy flow . 17
A.1 General . 17
A.2 Single logical unit. 17
A.3 Multiple logical units . 18
Bibliography . 20

Figure 1 – IEC 62386 graphical overview . 6
Figure A.1 – Example of single logical unit . 17
Figure A.2 – Example of control gear with DT1 and other power supplies . 18
Figure A.3 – Example with multiple logical units, DT1 and other power supplies . 19

IEC 62386-252:2023  IEC 2023 – 3 –
Table 1 – Memory bank 202, active energy and power . 11
Table 2 – Memory bank 203, apparent energy and power (optional) . 12
Table 3 – Memory bank 204, load side energy and power (optional) . 14
Table 4 – Declaration of variables . 15
Table 5 – Standard commands. 16

– 4 – IEC 62386-252:2023  IEC 2023
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DIGITAL ADDRESSABLE LIGHTING INTERFACE –

Part 252: Particular requirements – Energy reporting (device type 51)

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
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consensus of opinion on the relevant subjects since each technical committee has representation from all
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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 62386-252 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
34/1020/FDIS 34/1041/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.

IEC 62386-252:2023  IEC 2023 – 5 –
This Part 252 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.

– 6 – IEC 62386-252:2023  IEC 2023
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 62386-252 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 "d
...