April 2022 / Vol. 27 No. 4
By Ann Brandstadter, Manager, Standards Publications and Marketing, NEMA
American National Standard for Lighting Systems—Interoperability of LED Drivers and Other Connected Devices Via a Digital Addressable Lighting Interface ANSI C137.4-2021 (formerly titled American National Standard for Lighting Systems—Digital Interface with Auxiliary Power) specifies the minimum requirements for devices such as drivers, controls, sensors, and communication devices supporting a digital interface between devices.
ANSI C137.4 builds on the digital addressable lighting interface as specified in the IEC 62386 series of standards to specify the requirements for memory bank usage, logic signal interface, energy reporting, diagnostic information, as well as requirements for auxiliary power supplies that may be integrated into an LED driver.
Revisions to this lighting systems standard include:
- Added DALI Part 150 reference to AUX
- Added 2W AUX
- Added LSI section (With new Figs. 1 and 2)
- Added Energy Reporting (Part 252) section
- Added Diagnostics and Maintenance (Part 255) section
- Added Luminaire Mounted Control Devices (Part 351) section
- Reorganized to group memory bank-related sections together, renumber tables and references to tables
- Added new Clause 11.2 for 2W 24V AUX for Single Device Applications
It is available on the NEMA Standards Store for $92.
Other recently published standards:
American National Standard for Lighting Systems—Data Tagging Vocabulary (Semantic Model Elements) for Interoperability ANSI C137.6-2021 is available for $90.
American National Standard for Lighting Systems—Non-Active Mode Power Measurement ANSI C137.63103-2021 is available for $50.
Programmable Controllers, Part 1: General Information NEMA ICS 61131-1-2005 (R2013, 2021) (Formerly NEMA IA 2.1-2005) is available for $118.