IEC 61158-3-21 : 2.0 2019现行
Industrial communication networks - Fieldbus specifications - Part 3-21: Data-link layer service definition - Type 21 elements
出版：International Electrotechnical Committee
专家解读视频
This part of IEC 61158 provides the common elements for basic time-critical messaging communications between devices in an automation environment.
UNE-EN IEC 61158-3-21:2019 - Identical
NEN EN IEC 61158-3-21 : 2019 en - Identical
DS/EN IEC 61158-3-21 : 2019 - Identical
EN IEC 61158-3-21 : 2019 - Identical
BS EN IEC 61158-3-21 : 2019 - Identical
I.S. EN IEC 61158-3-21:2019 - Identical
PN-EN IEC 61158-3-21:2019-12 - Identical
UNE-EN IEC 61158-3-21:2019 - Identical
I.S. EN IEC 61158-3-21:2019 - Identical
DS/EN IEC 61158-3-21 : 2019 - Identical
BS EN IEC 61158-3-21 : 2019 - Identical
EN IEC 61158-3-21 : 2019 - Identical
NEN EN IEC 61158-3-21 : 2019 en - Identical
