IEC 61158-3-25 Ed. 1.0 en:2019

IEC 61158-3-25 Ed. 1.0 en:2019 Industrial communication networks - Fieldbus specifications - Part 3-25: Data-link layer service definition - Type X elements
standard by International Electrotechnical Commission, 04/10/2019

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IEC 61158-3-25:2019 defines the services provided to the Type 25 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. It provides common elements for basic time-critical messaging communications between devices in an automation environment.