IEC 63128-2024 PDF

Full title and description

IEC 63128:2019 with Amendment 1 (2024) — Lighting control interface for dimming: Analogue voltage dimming interface for electronic current‑sourcing controlgear. The document specifies the analogue control interface by which a voltage control device sinks the current‑source output of the controlgear to vary light output between minimum/off and maximum; safety requirements for controlgear remain covered by IEC 61347 (all parts).

Abstract

This standard describes the analogue voltage dimming interface for electronic current‑sourcing controlgear used in lighting applications. Amendment 1 (2024) adds optional functionality to simulate incandescent lamp behaviour (lowering correlated colour temperature when dimmed) and an informative annex on parallel control of two LEDs to achieve desired colour temperature with different powers. The document does not set general safety requirements for controlgear interfaces (see IEC 61347).

General information

• Status: Published (Amendment 1 issued; consolidated CSV available).
• Publication date: Amendment 1 published July 12, 2024 (consolidated edition CSV dated 12 July 2024; original edition 2019).
• Publisher: International Electrotechnical Commission (IEC); national adoptions published by multiple bodies (EN/BS/UNE etc.).
• ICS / categories: 29.140.99 (other standards related to lamps); Technical Committee: TC 34 (Lighting).
• Edition / version: Edition 1 (2019) with Amendment 1 (2024); consolidated CSV edition 1.1 (2019+AMD1:2024).
• Number of pages: Amendment 1: 16 pages (bilingual PDF); consolidated CSV: 29 pages.

Scope

Specifies the analogue voltage dimming control interface for electronic controlgear that behave as current sources. It defines how a voltage control device sinks the controlgear output current to achieve dimming from minimum/off to maximum output. The standard excludes general safety requirements for controlgear interfaces, which are covered by IEC 61347 (all parts). Amendment 1 adds optional provisions for incandescent‑like dimming behaviour and guidance on parallel LED control.

Key topics and requirements

• Definition of the analogue voltage dimming interface for current‑sourcing electronic controlgear (voltage‑sinking control device behaviour and expected response characteristics).
• Signal levels, interface characteristics and response behaviour needed to vary controlgear output between minimum/off and maximum.
• Clarification that safety requirements for controlgear interfaces are not specified here and are given in IEC 61347 (all parts).
• Optional function (Amendment 1) for simulation of incandescent‑lamp dimming (lowering correlated colour temperature at reduced light levels).
• Informative annex (Amendment 1) describing parallel control of two LEDs to achieve target colour temperatures at varying powers.

Typical use and users

Manufacturers of electronic controlgear (LED drivers and ballasts) and lighting control devices, integrators of dimming systems, lighting designers and specifiers, test laboratories, and standards committees use this standard to ensure interoperable analogue dimming behaviour where the controlgear provides a current‑source output and the dimmer sinks current. National standards bodies and product certification organizations also reference the consolidated edition and Amendment 1 for product assessment and regulatory alignment.

Related standards

Relevant related documents include IEC 61347 (all parts) for safety requirements of controlgear; the original IEC 63128:2019 edition; and regional adoptions and amendments such as EN IEC 63128:2019/A1:2024 and national transpositions (BS, UNE, STN, SFS, etc.). Technical work is maintained by IEC TC 34 (Lighting), WG 11.

Keywords

analogue dimming, voltage dimming interface, current‑sourcing controlgear, LED driver, controlgear interface, incandescent simulation, correlated colour temperature, IEC 63128, amendment 2024, TC 34.

FAQ

Q: What is this standard?

A: IEC 63128 specifies an analogue voltage dimming interface for electronic controlgear that operate as current sources; Amendment 1 (2024) updates the document with optional incandescent‑style dimming behaviour and related guidance.

Q: What does it cover?

A: It covers the interface behaviour and signal characteristics by which a voltage control device sinks the current‑source output of controlgear to vary luminous output from minimum/off to maximum. It does not replace safety standards for controlgear (see IEC 61347).

Q: Who typically uses it?

A: Controlgear and dimmer manufacturers, lighting system integrators, test and certification labs, and lighting specifiers use it to achieve interoperable analogue dimming in systems where the driver is current‑sourcing.

Q: Is it current or superseded?

A: The base standard IEC 63128 (2019) is current and was amended by Amendment 1 in 2024; a consolidated CSV edition (IEC 63128:2019+AMD1:2024, edition 1.1) was published to incorporate the amendment. The IEC webstore lists a stability date (target review) of 2027 for the consolidated edition.

Q: Is it part of a series?

A: IEC 63128 is a standalone document within the IEC lighting/controlgear family but relates closely to other IEC standards for controlgear and lamp interfaces (notably IEC 61347 series for safety). Regional adoptions are published as EN IEC/BS/UNE/etc. variants and amendments.

Q: What are the key keywords?

A: analogue voltage dimming, current‑sourcing controlgear, LED driver, incandescent simulation, dimming interface, IEC 63128, Amendment 1 (2024).