IEC 62386-250:2023

Digital addressable lighting interface - Part 250: Particular requirements - Integrated power supply (device type 49)

IEC 62386-250:2023 specifies the characteristics of a bus power supply integrated in a control gear. 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 250: Exigences particulières – Alimentation électrique intégrée (type de dispositif 49)

L'IEC 62386-250:2023 spécifie les caractéristiques d'une alimentation électrique de bus intégrée à un dispositif de commande. 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 62386-250:2023 is an international standard established by the International Electrotechnical Commission (IEC) that specifies the particular requirements for Integrated Power Supply (device type 49) within the framework of the Digital Addressable Lighting Interface (DALI). This standard defines the characteristics of a bus power supply integrated into control gear, building upon the DALI specifications in the IEC 62386 series. It specifically applies to control gear compliant with IEC 62386-102.

This edition, the first version published in 2023, ensures interoperability and uniform functionality of integrated bus power supplies, fostering enhanced reliability and performance in digital lighting control systems. It complements previous parts of the IEC 62386 series by focusing on power supply integration, and is intended to be used alongside IEC 62386-101 and IEC 62386-102.

Key Topics

• Scope and Application
  IEC 62386-250 addresses bus power supplies integrated into control gear for digital lighting systems, supporting the DALI protocol for communication and control. It is relevant only to devices conforming to IEC 62386-102.

• Electrical Specifications and Bus Power Supply Characteristics
  This standard defines requirements related to bus power supply ratings, current capacities, and status reporting to ensure proper power delivery to lighting components within a DALI system.

• Transmission Protocol and Timing
  The document outlines the transmission protocol structure and timing mechanisms for bus power supplies, facilitating precise and consistent communication aligned with DALI system standards.

• Memory Banks and Configuration
  Detailed provisions for memory bank management, including mandatory device identification memory banks, capability reporting, and configuration options, enable flexible and efficient device operation.

• Commands and Variables
  IEC 62386-250 specifies a set of commands-general, extended application, and special commands such as querying active power supply status and enabling device types-allowing centralized control and monitoring of integrated power supplies.

• Normative References
  This part references related IEC standards such as IEC 62386-101 (general system components), IEC 62386-102 (control gear requirements), and IEC 62386-150 (auxiliary power supply), ensuring coherence across the DALI ecosystem.

Applications

The IEC 62386-250 standard is pivotal for manufacturers and system integrators designing or utilizing integrated power supplies within DALI-based digital lighting systems. Key application areas include:

• Smart Lighting Control Systems
  Integration of power supplies within control gear enables streamlined lighting networks with improved energy efficiency and system reliability.

• Building Automation
  Compliance with IEC 62386-250 facilitates seamless integration of power supplies into lighting control devices, supporting automated lighting management in commercial and residential buildings.

• Industrial and Commercial Lighting
  Ensures reliable operation of bus-powered lighting control devices in industrial and commercial environments, where consistent power delivery and digital control are crucial.

• Energy Management Solutions
  Enables monitoring and control of bus power supplies for optimized energy consumption and enhanced user comfort.

Related Standards

• IEC 62386-101:2022 – General Requirements for System Components within the Digital Addressable Lighting Interface. This provides foundational system-level requirements relevant to IEC 62386-250.

• IEC 62386-102:2022 – General Requirements for Control Gear. IEC 62386-250 applies only to control gear complying with this part, ensuring compatibility and standardized control gear behavior.

• IEC 62386-150:2023 – Particular Requirements – Auxiliary Power Supply. Covers auxiliary power supplies which can be stand-alone or integrated, complementing IEC 62386-250's focus on integrated power supply units.

Summary

IEC 62386-250:2023 sets the essential requirements for integrated bus power supplies within control gear, advancing the Digital Addressable Lighting Interface standards. By defining electrical characteristics, protocol structures, memory management, and command sets, it promotes interoperability, reliable performance, and comprehensive control in smart lighting solutions worldwide. Adherence to this standard benefits manufacturers and system integrators aiming to build or deploy efficient, compliant, and future-proof digital lighting systems leveraging DALI communications.

Standards Content (Sample)

IEC 62386-250 ®
Edition 1.0 2023-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Digital addressable lighting interface –
Part 250: Particular requirements – Integrated power supply (device type 49)

Interface d'éclairage adressable numérique –
Partie 250: Exigences particulières – Alimentation électrique intégrée (type de
dispositif 49)
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IEC 62386-250 ®
Edition 1.0 2023-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Digital addressable lighting interface –

Part 250: Particular requirements – Integrated power supply (device type 49)

Interface d'éclairage adressable numérique –

Partie 250: Exigences particulières – Alimentation électrique intégrée (type de

dispositif 49)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.140.50, 29.140.99 ISBN 978-2-8322-6778-3

– 2 – IEC 62386-250:2023  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
6.1 General . 8
6.2 Bus power supply current rating . 8
6.3 Bus power supply status . 8
7 Transmission protocol structure . 8
8 Timing . 8
9 Method of operation . 8
9.1 Capabilities and configuration . 8
9.2 Memory banks . 8
9.2.1 General . 8
9.2.2 Memory bank writing . 8
9.2.3 Memory bank 201 . 9
10 Declaration of variables . 9
11 Definition of commands . 10
11.1 General . 10
11.2 Overview sheets . 10
11.3 Application extended commands . 10
11.3.1 General . 10
11.3.2 QUERY ACTIVE POWER SUPPLY . 10
11.4 Special commands . 10
11.4.1 General . 10
11.4.2 ENABLE DEVICE TYPE (data) . 10

Figure 1 – IEC 62386 graphical overview . 5

Table 1 – Memory bank 201, device identification (mandatory) . 9
Table 2 – Declaration of variables . 9
Table 3 – Definition of commands . 10

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DIGITAL ADDRESSABLE LIGHTING INTERFACE –

Part 250: Particular requirements –
Integrated power supply (device type 49)

FOREWORD
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IEC 62386-250 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
34/1018/FDIS 34/1039/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 62386-250:2023  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 250 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 62386-250 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 62386-250:2023  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 250: Particular requirements –
Integrated power supply (device type 49)

1 Scope
This part of IEC 62386 specifies the characteristics of a bus power supply integrated in a control
gear. 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
IEC 62386-150:2023, Digital addressable lighting interface – Part 150: Particular requirements
– Auxiliary power supply
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 "250", "version number" shall be
replaced by "extended version number" and "versionNumber" shall be replaced by
"extendedVersionNumber", where "extendedVersionNumber" is defined in Table 2.

– 8 – IEC 62386-250:2023  IEC 2023
5 Electrical specification
The requirements of IEC 62386-102:2022, Clause 5 apply.
6 Bus power supply
6.1 General
The requirements of IEC 62386-102:2022, Clause 6 apply with the following additions and
changes.
The requirements in this document shall be met even if "DA−" is connected to ground of an
integrated auxiliary power supply as specified in IEC 62386-150.
6.2 Bus power supply current rating
A bus power supply adhering to this document shall have a guaranteed supply current of at
least 50 mA when "bus power supply status" is on (bank 201 location 0x06).
NOTE Multiple bus power supplies can be connected in a system, provided the total of the maximum supply current
is no more than 250 mA. For example, a maximum of four control gear with device type 49 and integrated bus power
supplies, each with a maximum output current of 62,5 mA, can be connected to the bus without exceeding the 250 mA
total of maximum supply currents.
6.3 Bus power supply status
Memory bank 201 location 0x06 is used to configure and indicate the bus power supply status.
If a new value is written, then this new value shall be available immediately for memory reads
or queries, and the bus power supply output on the interface shall be enabled or disabled no
more than 500 ms after the value has been changed.
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 Capabilities and configuration
The capabilities and configuration of the integrated bus power supply are given and set via
parameters in memory bank 201, see 9.2.3.
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.

9.2.3 Memory bank 201
Memory bank 201 contains device information about the integrated bus power supply, as shown
in Table 1. Memory bank 201 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 201, device identification (mandatory)
a
Address Description Default value Memory type
Reset value
(factory)
0x00 Address of last accessible memory location 0x06 No change ROM
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 Version of the memory bank 0x01 No change ROM
0x04 Guaranteed supply current of integrated bus power Manufacturer- No change ROM
supply (in mA); Range: [0x32, maximum supply specific
current]
0x05 Maximum supply current of integrated bus power Manufacturer- No change ROM
supply (in mA); Range [Guaranteed supply current, specific
0xFA]
0x06 Bus power supply status (on = 0x01, off = 0x00); Manufacturer- No change NVM-RW
c
Range: [0x00, 0x01] specific
(protectable)
a
Reset value after "RESET MEMORY BANK".
b
Also used as power on value.
c
This field is write protectable.

To ensure that all configuration data is written as expected, it is recommended that a
mechanism is implemented to safely disable or enable an integrated bus power supply. For
example, a configuration tool can include a bus power supply and/or the configuration tool can
determine when to disable the integrated bus power supply after all configuration data has been
written.
10 Declaration of variables
The requirements of IEC 62386-102:2022, Clause 10 apply, with the following additional
variables for this device type, as indicated in Table 2.
Table 2 – Declaration of variables
Variable Default value Reset value Power on value Range of validity Memory
(factory) type
"extendedversionNumber" 2.0 no change no change 00001000b ROM
"deviceType" 49 no change no change 49 ROM
...