Current stage: 20.99 Effective date: Mar 6, 2026
Next stage: CD Next stage date: Jun 1, 2026
Originator: IEC
Owner: TC 65
Type: International Standard
ICS: 25.040.40 01.080.40
IN_DEVELOPMENT IEC 63131-2 ED1 20.99 WD approved for registration as CD Mar 6, 2026