IEC Standards IEC 62769-5-2021 pdf free download – Field device integration (FDI) – Part 5: Information Model IEC 62769-5-2021 pdf free download - Field device integration (FDI) – Part 5: Information Model. 4 Overview of oPc Unified Architecture 4.1General The main use case for OPC standards is the online data exchange . between devices... 02-16 Download Now