IEC 60744:2018提供了安全系统中用于执行A类安全功能的安全逻辑组件的设计、构造和测试的要求和建议（根据IEC 61226）。安全逻辑组件包括诸如将基于计算机的系统与开关设备、致动器或接触器接口以提供跳闸或工程安全特征致动的硬连线逻辑组件的逻辑。安全逻辑组件是安全系统的重要部分，并且可以包括冗余通道之间的表决逻辑。本文档提供了用于安全执行器控制的安全逻辑组件的一般描述。提出了满足可靠性目标的原则。描述和解释了与设计要求相关的主要特征。 与上一版相比，此新版本包括以下重大技术变更:a)更新自当前标准第一版发布以来发布或修订的标准的参考文献，包括IEC 61513和IEC 61226； b)运行和维护旁路使用的附加要求；投票逻辑的要求；还有其他人。

IEC 60744:2018 provides requirements and recommendations for the design, construction and test of safety logic assemblies used in safety systems to perform category A safety functions (in accordance with IEC 61226). Safety logic assemblies include logic such as the hardwired logic assembly interfacing computer-based systems to switchgear, actuators or contactors to provide trip or engineered safety feature actuations. Safety logic assemblies are significant parts of a safety system and may include voting logic between redundant channels. This document provides a general description of safety logic assemblies for safety actuators control. The principles to meet dependability objectives are presented. The main features relating to the design requirements are described and explained.
This new edition includes the following significant technical changes with respect to the previous edition:
a) update of the references to standards published or revised since the issue of the first edition of the current standard, including IEC 61513 and IEC 61226;
b) additional requirements for operational and maintenance bypass use; requirements of voting logic; and others.