IEC 60947-5-2:20 19适用于感测金属和/或非金属物体存在的电感和电容式接近开关、感测声音反射物体存在的超声波接近开关、感测物体存在的光电接近开关和感测具有磁场的物体存在的非机械磁性接近开关。 本第四版取消并取代了2007年出版的第三版和修正案1:20 12。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: 范围的更新； 根据IEC指南116调整和更新施工要求（例如，材料要求、人工光辐射、说明要求、热表面、无人值守操作、可预见的误用……）；修改有关传感范围和操作距离的规范； 带背景抑制的D型光电接近开关的新定义； 带背景抑制的D型光电接近开关的要求和测试程序的集成； 表9和表10中EMC要求的更新； 通过参考IEC 60947-1:20 07、IEC 60947-1:20 07/AMD1:2010和IEC 60947-1:20 07/AMD2:2014的附录O、W和Q，整合环境信息要求和环境状况； 冲击耐压试验的修改（5.3.1.3、9.3.3.4.5）； 修改（规范性）标准机构中对（资料性）附件A的引用； 附件A的主要更新（定义更新、新的尺寸和形状）； 更新C.9.1.1； 更新附录D，以考虑新的连接器类型和规范性参考； 附录F的更新（光电接近开关的附加符号）。

IEC 60947-5-2:2019 applies to inductive and capacitive proximity switches that sense the presence of metallic and/or non-metallic objects, ultrasonic proximity switches that sense the presence of sound reflecting objects, photoelectric proximity switches that sense the presence of objects and non-mechanical magnetic proximity switches that sense the presence of objects with a magnetic field.
This fourth edition cancels and replaces the third edition published in 2007 and Amendment 1:2012. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:

• update of the scope;
• adaptation and update of the construction requirements according to IEC Guide 116 (e.g. material requirements, artificial optical radiation, instruction requirements, hot surface, unattended operation, foreseeable misuse…);
• modification of the specifications concerning the sensing range and operating distance;
• new definitions for photoelectric proximity switch type D with background suppression;
• integration of the requirements and test procedures of photoelectric proximity switch type D with background suppression;
• update of EMC requirements in Table 9 and Table 10;
• integration of environmental information requirements and environmental condition by referencing Annexes O, W and Q of IEC 60947-1:2007, IEC 60947-1:2007/AMD1:2010 and IEC 60947-1:2007/AMD2:2014;
• modification of impulse withstand voltage test (5.3.1.3, 9.3.3.4.5);
• modification of the references in the (normative) standard body to the (informative) Annex A;
• major update of Annex A (definitions update, new dimensions and shapes);
• update of C.9.1.1;
• update of Annex D in order to consider new connector types and normative references;
• update of Annex F (additional symbols for photoelectric proximity switches).