IEC 62386-251:2023

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

IEC 62386-251:2023 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.

Interface d'éclairage adressable numérique - Partie 251: Exigences particulières - Extension du bloc de mémoire 1 (type de dispositif 50)

L'IEC 62386-251:2023 spécifie une extension du bloc de mémoire 1 pour activer la fonctionnalité de gestion des ressources. Le présent document enrichit l'interface d'éclairage adressable numérique spécifiée dans la série IEC 62386.
Ce document ne s'applique qu'aux appareillages de commande conformes à la norme IEC 62386-102.

General Information

• Status: Published
• Publication Date: 11-Apr-2023
• ICS: 29.140.50 - Lighting installation systems
• ICS: 29.140.99 - Other standards related to lamps
• Technical Committee: TC 34 - Lighting
• Drafting Committee: WG 11 - TC 34/WG 11
• Current Stage: PPUB - Publication issued
• Start Date: 12-Apr-2023
• Completion Date: 12-May-2023

Overview

IEC 62386-251:2023, titled Digital Addressable Lighting Interface – Part 251: Particular Requirements – Memory Bank 1 Extension (Device Type 50), is an international standard developed by the International Electrotechnical Commission (IEC). This standard specifies an extension to Memory Bank 1 within the Digital Addressable Lighting Interface (DALI) protocol, aimed at enabling enhanced asset management functionality for lighting control gear. This extension builds on the foundation established by the IEC 62386 series and is specifically applicable to control gear compliant with IEC 62386-102.

By standardizing memory bank extensions, IEC 62386-251 supports improved management, identification, and lifecycle tracking of lighting devices through the DALI system. This fosters interoperability and efficient device control within digital lighting infrastructures.

Key Topics

• Memory Bank 1 Extension
  The primary focus of IEC 62386-251:2023 is on extending Memory Bank 1 for device type 50 to accommodate asset management data. This facilitates detailed information storage related to the luminaires and control gear.

• Asset Management Functionality
  Enables enhanced tracking and management of lighting assets for maintenance, replacement, and operational optimization.

• Compatibility and Scope
  Applies exclusively to control gear that conform to IEC 62386-102, ensuring standardized operation within the digital lighting ecosystem.

• Protocol and Electrical Specifications
  Details on transmission protocol structure, timing, electrical requirements, and method of operation that align with established IEC 62386 series norms.

• Version Control
  Introduces the concept of an extended version number ("extendedVersionNumber") to distinguish updates related to the memory bank extension from general protocol versions.

Applications

• Smart Lighting Systems
  IEC 62386-251 supports smart building and infrastructure lighting by enabling comprehensive digital management of lighting devices. This is critical for automated asset tracking and operational efficiency.

• Asset Lifecycle Management
  Facilitates detailed record-keeping of lighting fixtures and control gear parameters, promoting proactive maintenance and replacement scheduling.

• Building and Facility Management
  Enhances integration with building management systems (BMS) through standardized data exchange on lighting equipment status and history.

• Roadway and Parking Lighting
  Coupled with related standards (e.g., ANSI/IES RP-8-18:2018), this standard aids in maintaining uniform, reliable lighting control and asset identification in outdoor applications.

• Interoperability in Lighting Networks
  Ensures that devices from different manufacturers operate seamlessly within a DALI-controlled network by following uniform memory and command structures.

Related Standards

• IEC 62386 Series
  The foundation for the DALI protocol, including:

  • Part 101: General requirements for system components
  • Part 102: General requirements for control gear (directly referenced by Part 251)
  • Parts 103-150: Covering control devices, wireless interfaces, firmware transfer, and auxiliary power supplies

• ANSI/IES RP-8-18:2018
  American National Standard for the design and maintenance of roadway and parking facility lighting, complementing asset management capabilities.

• ISO/IEC Directives
  Governing the development and structure of international standards to maintain consistency and quality.

Practical Value

Adoption of IEC 62386-251:2023 enables lighting manufacturers, system integrators, and facility managers to:

• Implement robust asset management within DALI lighting networks
• Improve maintenance efficiency through standardized device information
• Enhance control gear identification and interoperability
• Align with global best practices for digital lighting control

By incorporating this standard, stakeholders can leverage an extended memory framework that supports advanced lighting system management needs in commercial, industrial, and public infrastructure environments.

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For further information and to obtain the latest edition of IEC 62386-251:2023, visit the IEC Webstore or consult your local IEC National Committee. Staying compliant with this standard ensures access to cutting-edge, interoperable digital lighting technologies worldwide.

Standards Content (Sample)

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)
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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

– 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

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DIGITAL ADDRESSABLE LIGHTING INTERFACE –

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

FOREWORD
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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.

– 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.

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".
– 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".
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".
– 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.

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

– 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 – Declarati
...