IEC 62541 series - OPC unified architecture -ALL PARTS Updated at: 03-02-2021 Show more information ICT performance characteristics Interoperability (ICT) Industrial Reference ICT Architectures Reference Architectural Model Industrie 4.0 (RAMI 4.0) RAMI 4.0 Vertical Axis and associated standards Function Layer (RAMI 4.0) IEC 62541 series - OPC unified architecture