IEC 61784-3-1:20 10(E)规定了基于IEC 61784-1和IEC 61158类型1和9的CPF1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。这第二版取消并取代了2007年出版的第一版。本版构成技术修订版。与上一版相比的主要变化是: -与IEC 61784-3变更相关的更新； -图5的调整； -将7.2.2中的序列号从两个八位字节更改为四个八位字节，以匹配联合体的最终方案； -在7.2.4中增加了时间同步的细节； -在9.3中增加了安全性响应时间的信息； -在9.5中增加了用于计算系统特性的约束条件中的信息。

IEC 61784-3-1:2010(E) specifies a safety communication layer (services and protocol) based on CPF 1 of IEC 61784-1 and IEC 61158 Types 1 and 9. It identifies the principles for functional safety communications defined in IEC 61784-3 that are relevant for this safety communication layer. This second edition cancels and replaces the first edition published in 2007. This edition constitutes a technical revision. The main changes with respect to the previous edition are:
- updates in relation with changes in IEC 61784-3;
- adjustment of Figure 5;
- change of sequence number from two octets to four octets in 7.2.2 to match the final protocol from the consortium;
- addition of details for time synchronization in 7.2.4;
- addition of information for safety response time in 9.3;
- addition of information in constraints for calculation of system characteristics in 9.5.