IEC 61158-3-12:20 19定义了在现场总线参考模型的应用层和数据链路层之间的边界处向12型现场总线应用层提供的服务，以及在现场总线参考模型的数据链路层和系统管理之间的边界处向系统管理提供的服务。这第四版取消并取代了2014年出版的第三版。它构成技术修订。主要变化有: -通信服务中的技术更正 -为澄清而进行的编辑改进。

IEC 61158-3-12:2019 defines the services provided to the Type 12 fieldbus application layer at the boundary between the application and data-link layers of the fieldbus reference model and systems management at the boundary between the data-link layer and systems management of the fieldbus reference model. This fourth edition cancels and replaces the third edition published in 2014. It constitutes a technical revision. The main changes are:
- Technical corrections in the communication services
- Editorial improvements for clarification.