IEC 61158-4-21:2019被替代
Industrial communication networks - Fieldbus specifications - Part 4-21: Data-link layer protocol specification - Type 21 elements
出版：International Electrotechnical Committee
专家解读视频
The DLL provides basic time-critical data communications between devices in an automated environment.
I.S. EN IEC 61158-4-21:2019 - Identical
EN IEC 61158-4-21:2019 - Identical
DS/EN IEC 61158-4-21:2019 - Identical
UNE-EN IEC 61158-4-21:2019 - Identical
DIN EN IEC 61158-4-21:2020-08 - Identical
BS EN IEC 61158-4-21:2019 - Identical
CEI EN IEC 61158-4-21 : 2019 - Identical
PN-EN IEC 61158-4-21:2019-11 - Identical
NF EN IEC 61158-4-21:2019 - Identical
UNE-EN IEC 61158-4-21:2019 - Identical
BS EN 61158-4-21 : 2019 - Identical
EN IEC 61158-4-21:2019 - Identical
PN-EN IEC 61158-4-21:2019-11 - Identical
CEI EN IEC 61158-4-21 : 2019 - Identical
I.S. EN IEC 61158-4-21:2019 - Identical
DS/EN IEC 61158-4-21:2019 - Identical
DS/EN IEC 61158-4-21:2019 - Identical
EN IEC 61158-4-21:2019 - Identical
I.S. EN IEC 61158-4-21:2019 - Identical
UNE-EN IEC 61158-4-21:2019 - Identical
PN-EN IEC 61158-4-21:2019-11 - Identical
CEI EN IEC 61158-4-21 : 2019 - Identical
BS EN 61158-4-21 : 2019 - Identical
