IEC 61784 3-6:2010规定了基于IEC 61784-1、IEC 61784-2和IEC 61158 8型CPF 6的安全通信层（服务和协议）。它确定了IEC 61784-3中定义的与该安全通信层相关的功能安全通信原则。本部分根据IEC 61508系列功能安全要求，定义了使用现场总线技术在分布式网络内参与者之间传输安全相关信息的机制。这些机制可用于各种工业应用，如过程控制、制造自动化和机械。第二版取消并取代2007年出版的第一版。 这是一项技术性修订。与前一版本相比，主要变化是:与IEC 61784 3中的变化相关的更新。2011-11年出版的双语版本与2010-07年出版的英文版本相对应。

IEC 61784 3-6:2010 specifies a safety communication layer (services and protocol) based on CPF 6 of IEC 61784-1, IEC 61784-2 and IEC 61158 Type 8. It identifies the principles for functional safety communications defined in IEC 61784-3 that are relevant for this safety communication layer. This part defines mechanisms for the transmission of safety-relevant messages among participants within a distributed network using fieldbus technology in accordance with the requirements of IEC 61508 series for functional safety. These mechanisms may be used in various industrial applications such as process control, manufacturing automation and machinery. This second edition cancels and replaces the first edition published in 2007. It constitutes a technical revision. The main changes with respect to the previous edition are: updates in relation with changes in IEC 61784 3. This bilingual version published in 2011-11, corresponds to the English version published in 2010-07.