IEC 62386-222:2018

Digital addressable lighting interface - Part 222: Particular requirements for control gear - Thermal lamp protection (device type 21)

IEC 62386-222:2018 specifies a bus system for control by digital signals of electronic lighting equipment which is in line with the requirements of IEC 61347 (all parts), with the addition of DC supplies.

Interface d’éclairage adressable numérique - Partie 222: Exigences particulières pour les appareillages de commande - Protection thermique de la lampe (dispositif de type 21)

L’IEC 62386-222:2018 spécifie un système à bus pour la commande par des signaux numériques des appareils d'éclairage électroniques conformes aux exigences de l'IEC 61347 (toutes les parties), en ajoutant les alimentations en courant continu.

General Information

• Status: Published
• Publication Date: 09-Apr-2018
• ICS: 29.140.50 - Lighting installation systems
• ICS: 29.140.99 - Other standards related to lamps
• Technical Committee: SC 34C - Auxiliaries for lamps
• Drafting Committee: WG 11 - TC 34/WG 11
• Current Stage: PPUB - Publication issued
• Start Date: 10-Apr-2018
• Completion Date: 13-Apr-2018

IEC 62386-222:2018 Overview

IEC 62386-222:2018 is an international standard published by the International Electrotechnical Commission (IEC) that defines digital addressable lighting interface (DALI) requirements focusing on thermal lamp protection for electronic lighting control gear (device type 21). This part of the IEC 62386 series specifies how electronic lighting equipment should be controlled via digital signals, enhancing safety and reliability by protecting lamps from thermal overload.

Designed to be used alongside Parts 101 and 102 of IEC 62386, this standard expands the general requirements for control gear to include thermal protection features. Its scope includes control of electronic lighting devices in line with IEC 61347 standards, adding provisions for direct current (DC) power supply compatibility.

Purpose and Importance

• Provides thermal lamp protection mechanisms within lighting control systems.
• Enables digital bus communication for intelligent control gear to prevent lamp overheating.
• Ensures interoperability and compatibility between lighting control devices and electronic control gear.
• Supports safer, more efficient lighting management with thermal overload detection and shutdown capabilities.

This standard is critical for manufacturers, designers, and integrators developing and deploying thermal protection functions in digital lighting control systems.

---

Key Features of IEC 62386-222:2018

IEC 62386-222 elaborates specific requirements and operational details for control gear with thermal lamp protection, including:

• Thermal Protection Algorithms: Defines the behavior of thermal lamps, including temperature monitoring, overload detection, and automatic shutdown procedures to prevent damage.
• Communication Protocol: Specifies the digital transmission structure, commands, and timing necessary for reliable bus communication between control gear and lighting control devices.
• Variable Declarations: Details variables used within device operations such as temperature parameters and failure status indicators.
• Control Commands: Encompasses application extended commands and special commands for activation and configuration of thermal lamp protection features.
• Failure and Shutdown Procedures: Defines status codes for control gear failure, including thermal overload scenarios and recovery protocols.
• Interface Power Supply Requirements: Specifies electrical supply considerations for the control gear supporting these features.

The standard includes graphical representations such as the thermal lamp protection state diagram and example temperature curves, assisting developers in implementing compliant devices.

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Practical Applications

IEC 62386-222:2018 is widely applicable in the lighting industry where thermal lamp protection is crucial, such as:

• Commercial and Industrial Lighting Systems: Ensuring safety and longevity of lamps by preventing overheating through precise digital control.
• Smart Lighting Solutions: Enabling integration with building automation systems using DALI protocols for smarter energy management.
• LED and Electronic Lamp Drivers: Protecting delicate electronic components and lamps by adhering to defined thermal protection requirements.
• Retrofit and New Installations: Facilitating upgrade paths for existing lighting infrastructure to adopt standard-compliant thermal protection controls.

By following this standard, manufacturers can deliver controllers that proactively detect temperature thresholds and respond to faults, minimizing downtime and maintenance costs while enhancing occupant safety.

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Related IEC Standards

For comprehensive lighting control system design, IEC 62386-222:2018 should be used in conjunction with these standards within the IEC 62386 series:

• IEC 62386-101:2014 - General requirements for system components of digital addressable lighting interfaces.
• IEC 62386-102:2014 - General requirements for lighting control gear.
• IEC 61347 (all parts) - General and particular requirements for lamp control gear.
• Other IEC 62386 2xx parts - Address lamp-specific control gear extensions.
• IEC 62386 3xx parts - Cover input devices for lighting control systems.

These related standards collectively ensure interoperable, safe, and efficient control of lighting systems across various device types and scenarios, supporting a universal approach to digital lighting management.

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Keywords: IEC 62386-222, digital addressable lighting interface, DALI, thermal lamp protection, control gear, electronic lighting equipment, lighting control standards, thermal overload, lamp safety, lighting system protection, IEC standards for lighting, smart lighting control, electronic lamp driver protection.

Standards Content (Sample)

IEC 62386-222 ®
Edition 1.0 2018-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Digital addressable lighting interface –
Part 222: Particular requirements for control gear – Thermal lamp protection
(device type 21)
Interface d’éclairage adressable numérique –
Partie 222: Exigences particulières pour les appareillages de commande –
Protection thermique de la lampe (dispositifs de type 21)

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IEC 62386-222 ®
Edition 1.0 2018-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Digital addressable lighting interface –

Part 222: Particular requirements for control gear – Thermal lamp protection

(device type 21)
Interface d’éclairage adressable numérique –

Partie 222: Exigences particulières pour les appareillages de commande –

Protection thermique de la lampe (dispositifs de type 21)

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.140.50; 29.140.99 ISBN 978-2-8322-5503-2

– 2 – IEC 62386-222:2018 © IEC 2018
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 General . 8
4.1 General . 8
4.2 Version number . 8
5 Electrical specification . 8
6 Interface power supply . 8
7 Transmission protocol structure . 8
8 Timing . 8
9 Method of operation . 8
9.1 General . 8
9.2 Thermal lamp behaviour. 8
9.3 Thermal lamp overload . 10
9.4 Thermal lamp shutdown . 10
9.5 Failure status . 11
10 Declaration of variables . 12
11 Definition of commands . 12
11.1 General . 12
11.2 Overview sheets . 12
11.3 Application extended commands . 13
11.3.1 General . 13
11.3.2 Configuration instructions . 13
11.3.3 Queries. 13
11.4 Special commands . 14
11.4.1 General . 14
11.4.2 ENABLE DEVICE TYPE (data) . 14
Bibliography . 15

Figure 1 – IEC 62386 graphical overview . 5
Figure 2 – Thermal lamp protection state diagram . 9
Figure 3 – Example of temperature change over time . 10

Table 1 – Control gear failure status . 11
Table 2 – Declaration of variables . 12
Table 3 – Application extended commands for this device type . 13

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DIGITAL ADDRESSABLE LIGHTING INTERFACE –

Part 222: Particular requirements for control gear –
Thermal lamp protection (device type 21)

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
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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.
International Standard IEC 62386-222 has been prepared by IEC technical committee 34:
Lamps and related equipment.
The text of this International Standard is based on the following documents:
FDIS Report on voting
34/484/FDIS 34/507/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

– 4 – IEC 62386-222:2018 © IEC 2018
This Part 222 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 web site under "http://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 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.
The 2xx parts extend 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 3xx parts extend 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 62386-222 is intended to be used in conjunction with
IEC 62386-101:2014, IEC 62386-101:2014/AMD1:—, IEC 62386-102:2014 and
IEC 62386-102:2014/AMD1:—. The division 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.
2xx 2xx 2xx 2xx 2xx 3xx 3xx 3xx 3xx 3xx
102 General requirements - 103 General requirements -
Control gear Control devices
101 General requirements -
System components
IEC
Figure 1 – IEC 62386 graphical overview
This document, and the other parts that make up the IEC 62386-200 series, in referring to any
of the clauses of IEC 62386-1XX, specifies the extent to which such a clause is applicable;
the parts also include additional requirements, as necessary.
Where the requirements of any of the clauses of IEC 62386-1XX are referred to in this
document by the sentence “The requirements of IEC 62386-1XX, Clause “n” apply”, this
sentence is to be interpreted as meaning that all requirements of the clause in question of
Part 1XX apply, except any which are clearly inapplicable.
The standardization of the control interface for control gear is intended to achieve compatible
co-existence between electronic control gear and lighting control devices, below the level of
building management systems. This document describes a method of implementing control
gear.
– 6 – IEC 62386-222:2018 © IEC 2018
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”.
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 222: Particular requirements for control gear –
Thermal lamp protection (device type 21)

1 Scope
This part of IEC 62386 specifies a bus system for control by digital signals of electronic
lighting equipment which is in line with the requirements of IEC 61347 (all parts), with the
addition of DC supplies.
This document is only applicable to IEC 62386-102:2014 and IEC 62386-102:2014/AMD1:—
control gear that implements thermal lamp protection.
NOTE Requirements for testing individual products during production are not included.
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 62386-101:2014, Digital addressable lighting interface – Part 101: General requirements
– System components
IEC 62386-101:2014/AMD1:—
IEC 62386-102:2014, Digital addressable lighting interface – Part 102: General requirements
– Control gear
IEC 62386-102:2014/AMD1:—
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 terminological 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
thermal lamp overload
condition in which the lamp temperature exceeds the upper limit T of the normal operating
ovl
range and with the consequence that the light output is reduced
_______________
Under preparation. Stage at the time of publication: IEC CCDV 62386-101/AMD1:2018.
Under preparation. Stage at the time of publication: IEC CCDV 62386-102/AMD1:2018.

– 8 – IEC 62386-222:2018 © IEC 2018
3.2
thermal lamp shutdown
thermal lamp overload condition in which the lamp temperature exceeds the maximum
permissible temperature T and with the consequence that the lamp is switched off
shut
4 General
4.1 General
The requirements of IEC 62386-102:2014 and IEC 62386-102:2014/AMD1:—, Clause 4 apply,
with the restrictions, changes and additions identified below.
4.2 Version number
In 4.2 of IEC 62386-102:2014 and IEC 62386-102:2014/AMD1:—, “102” shall be replaced by
“222”, “version number” shall be replaced by “extended version number” and “versionNumber”
shall be replaced by “extendedVersionNumber”.
5 Electrical specification
The requirements of IEC 62386-102:2014 and IEC 62386-102:2014/AMD1:—, Clause 5 apply.
6 Interface power supply
The requirements of IEC 62386-102:2014 and IEC 62386-102:2014/AMD1:—, Clause 6 apply.
7 Transmission protocol structure
The requirements of IEC 62386-102:2014 and IEC 62386-102:2014/AMD1:—, Clause 7 apply.
8 Timing
The requirements of IEC 62386-102:2014 and IEC 62386-102:2014/AMD1:—, Clause 8 apply.
9 Method of operation
9.1 General
The requirements of IEC 62386-102:2014 and IEC 62386-102:2014/AMD1:—, Clause 9 apply
with the following additions.
9.2 Thermal lamp behaviour
Depending on the lamp temperature, various states can be identified within a control gear:
• Normal: the lamp temperature is in the defined temperature ranges.
• Overload: the lamp temperature exceeds the defined overload temperature threshold
(T ).
ovl
• Shutdown: the lamp temperature exceeds the defined shutdown temperature threshold
(T ).
shut
All possible state transitions are illustrated in Figure 2.

Thermal lamp protection
T < (T – H )
shut shut
[(T – H )≤(T – H )]
shut shut ovl ovl
T < (T – H )
shut shut
Normal T < (T – H ) Overload [(T – H )>(T – H )] Shutdown
ovl ovl shut shut ovl ovl
T > T Light level reduction T > T Lamp switched off
ovl shut
IEC
Figure 2 – Thermal lamp protection state diagram
To avoid unwanted frequent switching for each temperature threshold a hysteresis is defined
as follows:
• H : hysteresis defined for T ;
ovl ovl
• H : hysteresis defined for T .
shut shut
The temperature thresholds T and T and their corresponding hysteresis H and H
ovl shut ovl shut
are manufacturer specific and shall be stated in the manual/documentation.
The relation between the temperature thresholds in Kelvin and their corresponding hysteresis
is as follows:
• T ≤ T ;
ovl shut
• H < T ;
ovl ovl
• H < T .
shut shut
Starting from a normal state, if the lamp temperature rises above T the control gear shall
ovl
enter the overload state. If the lamp temperature increases even more, rising above T , the
shut
control gear shall enter the shutdown state. When the lamp temperature drops below (T –
shut
H ), but above T , the control gear shall return to the overload state. When the lamp
shut ovl
temperature drops below (T – H ), the control gear shall return to the normal state.
ovl ovl
Figure 3 illustrates this case.

– 10 – IEC 62386-222:2018 © IEC 2018
T
shut
H
shut
T – H
shut shut
T
ovl
T – H
ovl ovl
H
ovl
Shutdown Shutdown
state state
Overload Normal Overload Overload Overload Normal
state state state state state state
0 1 2 3 4 5 6 7 8 9
Time
IEC
Figure 3 – Example of temperature change over time
The fact that a thermal lamp protection is implemented and its actual status can be queried
does not relieve the user from the obligation to comply with safety relevant information for
installation given by the manufacturer. A note to this effect shall be included in the
manual/documentation.
9.3 Thermal lamp overload
When the lamp temperature rises above T , the control gear shall enter the overload state.
ovl
When entering the overload state the control gear shall:
• set “lampFailure” to TRUE;
• set “thermalLampOverload” to TRUE;
• when entering from normal state: increment “overloadCounter” by 1, unless it equals 255;
• change the normal relationship between “actualLevel” and light output in order to decrease
the lamp temperature.
While in the overload state, there shall be light in case “actualLevel” is not zero, except in the
case of total lamp failure.
When the lamp temperature drops below (T – H ), the control gear shall return to the
ovl ovl
normal state. On return to the normal state the control gear shall:
• set “lampFailure” to FALSE;
• set “thermalLampOverload” to FALSE;
• re-establish the normal relationship between “actualLevel” and light output.
“thermalLampOverload” can be queried using QUERY THERMAL LAMP OVERLOAD.
9.4 Thermal lamp shutdown
When the lamp temperature rises above T , the control gear shall enter the shutdown state.
shut
Temperature (°C)
When entering the shutdown state the control gear shall additionally to the overload state:
• set “thermalLampShutdown” to TRUE;
• set the light output to 0 %;
• increment “shutdownCounter” by 1, unless it equals 255;
• set “lampOn” to FALSE.
When the lamp temperature drops below (T – H ), the control gear shall:
shut shut
• return to the overload state, if the temperature thresholds and hysteresis are set such that
the following condition applies (T – H ) > (T – H );
shut shut ovl ovl
• or, return to the normal state, if the temperature thresholds and hysteresis are set such
that the following condition applies (T – H ) ≤ (T – H ).
shut shut ovl ovl
On return to the overload state the control gear shall:
• set “thermalLampShutdown” to FALSE;
• the light output shall be adjusted according to the overload state;
• “lampOn” shall reflect the actual status.
On return to the normal state the control gear shall:
• set “lampFailure” to FALSE;
• set “thermalLampOverload” to FALSE;
• set “thermalLampShutdown” to FALSE;
• re-establish the normal relationship between “actualLevel” and light output;
• “lampOn” shall reflect the actual status.
“thermalLampShutdown” can be queried using QUERY THERMAL LAMP SHUTDOWN.
NOTE Returning from shutdown state to normal or overload state could include the startup phase as indicated in
IEC 62386-102:2014 and IEC 62386-102:2014/AMD1:—, Clause 9.
9.5 Failure status
Failures are notified in the failure status byte. The failure status byte shall be updated
regularly by the control gear and shall reflect the actual situation without delay unless
explicitly stated otherwise. The failure status byte can be queried with
“QUERY FAILURE STATUS”. See Table 1.
Table 1 – Control gear failure status
Bit Description Value
0 Reserved -
1 Reserved -
2 Reserved -
3 Reserved -
4 Reserved -
5 “thermalLampShutdown” “1” = Yes
6 “thermalLampOverload” “1” = Yes
7 Reserved -
– 12 – IEC 62386-222:2018 © IEC 2018
“overloadCounter” and “shutdownCounter” indicate how often the overload state or the shutdown
state have been entered since the counters were last reset. The counters have a maximum
value of 255 and will not increase further. The variables can be queried with
“QUERY THERMAL LAMP SHUTDOWN COUNTER” and
“QUERY THERMAL LAMP OVERLOAD COUNTER”, and can be cleared with
“RESET THERMAL LAMP COUNTER”.
10 Declaration of variables
The requirements of IEC 62386-102:2014 and IEC 62386-102:2014/AMD1:—, 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
a b
c
“failureStatus” 0 0,64,96 RAM
“overloadCounter” 0 no change no change [0,255] NVM

“shutdownCounter” 0 no change no change [0,255] NVM
a b
c
“thermalLampShutdown” FALSE [TRUE, FALSE] RAM
a b
c
“thermalLampOverload” FALSE [TRUE, FALSE] RAM

“extendedVersionNumber” 2.0 no change no change 00001000b ROM

“deviceType” 21 no change no change 21 ROM
a
Not applicable.
b
The value could change as a consequence of the RESET command execution.
c
The value should reflect the actual situation as soon as possible.

11 Definition of commands
11.1 General
The requirements of IEC 62386-102:2014 and IEC 62386-102:2014/AMD1:—, Clause 11,
apply with the following additions.
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 – Application extended commands for this device type
Command name Address Opcode References Command
byte byte reference
See
IEC 62386-102,
7.2.2
RESET THERMAL LAMP
Device 1 0xE0    9.5 11.3.2.2
COUNTER
9.3, 9.4,
QUERY FAILURE STATUS Device 1 0xF1   11.3.3.2
9.5
QUERY THERMAL LAMP
Device 1 0xF7   9.4 11.3.3.3
SHUTDOWN
QUERY THERMAL LAMP
Device 1 0xF8   9.3 11.3.3.4
OVERLOAD
QUERY THERMAL LAMP
Device 
1 0xF9   9.5 11.3.3.5
SHUTDOWN COUNTER
QUERY THERMAL LAMP
Device 
1 0xFA   9.5 11.3.3.6
OVERLOAD COUNTER
QUERY EXTENDED VERSION
Device 1 0xFF   4.2 11.3.3.7
NUMBER
ENABLE DEVICE TYPE (data) 0xC1 0x15    11.4.2

11.3 Application extended commands
11.3.1 General
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.
11.3.2 Configuration instructions
11.3.2.1 General
The requirements of IEC 62386-102:2014 and IEC 62386-102:2014/AMD1:—, 11.4.1 apply
with the fol
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