IEC 62386-252:2023

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)
IEC 62386-252:2023-04(en-fr)

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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




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– 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

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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

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– 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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Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
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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.

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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.

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– 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 "don't care".

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IEC 62386-252:2023  IEC 2023 – 7 –
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".

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– 8 – IEC 62386-252:2023  IEC 2023
DIGITAL ADDRESSABLE LIGHTING INTERFACE –

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



1 Scope
This part of IEC 62386 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.
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
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 62386-102 and the
following 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 power
mean power over one period
Note 1 to entry: Active power is expressed in watt (W).
3.2
active energy
integral of power over a time interval
Note 1 to entry: Active energy is expressed in watt hour (Wh).

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IEC 62386-252:2023  IEC 2023 – 9 –
3.3
apparent power
product of the RMS voltage between the terminals of a two-terminal element or two-terminal
circuit and the RMS electric current in the element or circuit
Note 1 to entry: Apparent power is expressed in volt ampere (VA).
[SOURCE: IEC 60050-131:2013, 131-11-41, modified – The notes to entry have been replaced
by a new Note 1 to entry.]
3.4
apparent energy
integral of apparent power over a time interval
Note 1 to entry: Apparent energy is expressed in volt ampere hour (VAh)
3.5
load side power
power supplied to the lamps connected to the logical unit, including corresponding conversion
losses
Note 1 to entry: Load side power is expressed in watt (W).
3.6
load side energy
integral of load side power over a time interval
Note 1 to entry: Load side energy is expressed in watt hour (Wh).
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 "252", "version number" shall be
replaced by "extended version number" and "versionNumber" shall be replaced by
"extendedVersionNumber".
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.

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– 10 – IEC 62386-252:2023  IEC 2023
8 Timing
The requirements of IEC 62386-102:2022, Clause 8 apply.
9 Method of operation
9.1 General
The requirements of IEC 62386-102:2022, Clause 9 apply with the following additions.
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 Accuracy of measurements
The accuracy of measurements for the values in the memory banks is determined by the
manufacturer and is not specified in this document.
9.2.3 Rounding of measurement values
Measurement values shall be rounded to the nearest integer, with values ending in 0,5 rounded
up.
9.2.4 Refresh rate of memory bank values
The minimum refresh rate of all memory bank values shall be one refresh cycle in 30 s. The
minimum refresh rate shall be valid if the control gear is powered regardless of the status of
"lampOn".
9.2.5 No overflow of counters
Counters shall not overflow. Their maximum value shall be MASK – 2, representing the given
value or more.
9.2.6 Memory bank 202, active energy and power
Table 1 shows the memory bank 202 content. All locations shall be common for all logical units,
such that a change to any location in one logical unit shall be reflected in the other logical units.

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IEC 62386-252:2023  IEC 2023 – 11 –
Table 1 – Memory bank 202, active energy and power
a
Address Description Default value Memory type Multi-output
Reset value
e
(factory)
requirement
f
0x00 Address of last accessible memory 0x0F No change ROM
Ind
location
f
0x01 Indicator byte Manufacturer- Manufacturer- Manufacturer-
Ind
specific specific specific
b f
0x02 Lock byte 0xFF RAM-RW
0xFF Ind
Lockable bytes in the memory bank
shall be read-only while the lock
byte has a value different from 0x55.
Latching of the complete memory
bank can be achieved by writing a
value of 0xAA to this location. See
IEC 62386-102:2022, 9.10.5.5.
f
0x03 Version of the memory bank 0x01 No change ROM
Ind
f
0x04 ScaleFactorForActiveEnergy Control gear No change ROM
Ind
dependent
Scale factor for ActiveEnergy values
in this memory bank, expressed as a
power of 10 (scale factor =
ScaleFactorForActiveEnergy
10 × 1 Wh);
for example: −3 denotes 1 mWh, +3
denotes 1 kWh
Range of validity:[0, 6],
c
[0xFA,0xFF]
f
0x05 ActiveEnergy (MSB) 0x00 No change NVM-RO
Ind
f
0x06 ActiveEnergy 0x00 No change NVM-RO
Ind
f
0x07 ActiveEnergy 0x00 No change NVM-RO
Ind
f
0x08 ActiveEnergy 0x00 No change NVM-RO
Ind
f
0x09 ActiveEnergy 0x00 No change NVM-RO
Ind
f
0x0A ActiveEnergy (LSB) 0x00 No change NVM-RO

Ind
The total active energy input for the
control gear. See Annex A.
The scale factor is defined by
ScaleFactorForActiveEnergy (0x04)
Range of validity: [0, 0xFF FF FF FF
FF FD] ,TMASK
f
0x0B ScaleFactorForActivePower Control gear No change ROM
Ind
dependent
Scale factor for ActivePower values
in this memory bank, expressed as a
power of 10 (scale factor =
ScaleFactorForActivePower
× 1 W); for
10
example: −3 denotes 1 mW, +3
denotes 1 kW
Range of validity: [0, 6],
c
[0xFA,0xFF]
d f
0x0C ActivePower (MSB) No change RAM-RO
Ind
d f
0x0D ActivePower No change RAM-RO
Ind
d f
0x0E ActivePower No change RAM-RO
Ind

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– 12 – IEC 62386-252:2023  IEC 2023
a
Address Description Default value Memory type Multi-output
Reset value
e
(factory)
requirement
d f
0x0F ActivePower (LSB) No change RAM-RO
Ind
The total active power input for the
control gear. See Annex A.
The scale factor is defined by
ScaleFactorForActivePower (0x0B)
Range of validity: [0, 0xFF FF FF
FD], TMASK
Key
LSB least significant byte
MSB most significant byte
a
Reset value after "RESET MEMORY BANK".
b
Also used as power on value.
c
The value shall be represented as two’s complement in the range of [−6.+6] such that −3 is represented by a
stored value of 0xFD and +3 is represented by a stored value of 0x03.
d
The value should reflect the actual situation as soon as possible.
e
Multiple lamp outputs on the same logical unit.
f
Ind: Value is independent of the number of lamp outputs of the logical unit.

9.2.7 Memory bank 203, apparent energy and power
Table 2 shows the memory bank 203 content. All locations shall be common for all logical units,
such that a change to any location in one logical unit shall be reflected in the other logical units.
Implementation of this memory bank 203 is optional. If implemented, the content shall be
implemented as shown in Table 2.
Table 2 – Memory bank 203, apparent energy and power
a
Address Description Default value Memory type Multi-output
Reset value
e
(factory)
requirement
f
0x00 Address of last accessible memory 0x0F No change ROM
Ind
location
f
0x01 Indicator byte Manufacturer- Manufacturer- Manufacturer-
Ind
specific
specific specific
b f
0x02 Lock byte 0xFF RAM-RW
0xFF Ind
Lockable bytes in the memory bank
shall be read-only while the lock
byte has a value different from 0x55.
Latching of the complete memory
bank can be achieved by writing a
value of 0xAA to this location. See
IEC 62386-102:2022, 9.10.5.5.
f
0x03 Version of the memory bank 0x01 No change ROM
Ind
f
0x04 ScaleFactorForApparentEnergy Control gear No change ROM
Ind
dependent
Scale factor for ApparentEnergy
values in this memory bank,
expressed as a power of 10 (scale
ScaleFactorForApparentEnergy
factor = 10
× 1 VAh); for example: −3 denotes
1 mVAh, +3 denotes 1 kVAh
Range of validity: [0, 6],
c
[0xFA,0xFF]

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IEC 62386-252:2023  IEC 2023 – 13 –
a
Address Description Default value Memory type Multi-output
Reset value
e
(factory)
requirement
f
0x05 ApparentEnergy (MSB) 0x00 No change NVM-RO
Ind
f
0x06 ApparentEnergy 0x00 No change NVM-RO
Ind
f
0x07 ApparentEnergy 0x00 No change NVM-RO
Ind
f
0x08 ApparentEnergy 0x00 No change NVM-RO
Ind
f
0x09 ApparentEnergy 0x00 No change NVM-RO
Ind
f
0x0A ApparentEnergy (LSB) 0x00 No change NVM-RO
Ind
The total apparent energy input for
the control gear. See Annex A.
The scale factor is defined by
ScaleFactorForApparentEnergy
(0x04)
Range of validity: [0, 0xFF FF FF FF
FF FD], TMASK
f
0x0B ScaleFactorForApparentPower Control gear No change ROM
Ind
dependent
Scale factor for ApparentPower
values in this memory bank,
expressed as a power of 10 (scale
ScaleFactortForApparentPower
factor = 10
× 1 VA); for example: −3 denotes
1 mVA, +3 denotes 1 kVA
Range of validity: [0, 6],
c
[0xFA,0xFF]
d f
0x0C ApparentPower (MSB) No change RAM-RO
Ind
d f
0x0D ApparentPower No change RAM-RO
Ind
d f
0x0E ApparentPower No change RAM-RO
Ind
d f
0x0F ApparentPower (LSB) No change RAM-RO
Ind
The total apparent power input for
the con
...