IEC 60669-2-1:20 21适用于电子控制设备，这是一个通用术语，涵盖电子开关、家庭和建筑电子系统（HBES）/建筑自动化和控制系统（BACS）开关和电子扩展单元。 它适用于电子开关和HBES/BACS开关，仅用于额定开关电压不超过250 V、额定电流不超过16 A的交流（AC），用于室内或室外的家用和类似固定电气装置。 它也适用于额定电源电压不超过250 V AC和120 V DC的电子扩展单元，如传感器和按钮。 本文件也适用于电子遥控开关（RCS）和电子延时开关（TDS）。附件FF给出了具体要求。本第五版取消并取代了2002年出版的第四版、修正案1:20 08和修正案2:20 15。本版构成技术修订版。 与上一版相比，此版本包括以下重大技术变更: a)纳入先前包含在IEC 60669-2-5中的HBES交换机要求； b)修改19.106，LED开关的测试和要求； c)涵盖电子控制装置的一般指示； d)测试循环通过。

IEC 60669-2-1:2021 applies to electronic control devices, a general term to cover electronic switches, home and building electronic systems (HBES) / building automation and control systems (BACS) switches and electronic extension units.
It applies to electronic switches and to HBES/BACS switches, for alternating current (AC) only with a rated switching voltage not exceeding 250 V and a rated current not exceeding 16 A, intended for household and similar fixed electrical installations, either indoors or outdoors.
It also applies to electronic extension units with a rated supply voltage not exceeding 250 V AC and 120 V DC, such as sensors and push buttons.
This document also applies to electronic remote control switches (RCS) and electronic time delay switches (TDS). Particular requirements are given in Annex FF.
This fifth edition cancels and replaces the fourth edition published in 2002, Amendment 1:2008 and Amendment 2:2015. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) incorporation of the requirements for HBES switches, previously included in IEC 60669-2-5;
b) modification of 19.106, test and requirements for switches for LEDs;
c) general indication to cover electronic control devices;
d) test for looping through.