S95 STANDARD
The ISA 95 Standard for Enterprise-Control System Integration defines interfaces between applications at the Industrial Control Level and applications at the MES (Manufacturing Execution Systems) Level. As such, it bridges the gap between control-level communications which are typically implemented using OPC, and business-level applications using EDI and various B2B standards.
The standard is being defined in "parts" which are individually released as they are approved.
The official ISA 95 standard is defined by ANSI / ISA - 95.00.xx. These are available to ISA members for free as follows:
| Description | Date | Availability | |
| Part 1 | Models and Terminology | 2025 | Free for ISA |
| Part 2 | Objects and Attributes for Enterprise-Control System Integration | 2018 | Free for ISA |
| Part 3 | Activity Models of Manufacturing Operations Management | 2013 | Free for ISA |
| Part 4 | Objects and Attributes for Manufacturing Operations Management Integration | 2018 | Free for ISA |
| Part 5 | Business to Manufacturing Transactions | 2018 | Free for ISA |
| Part 6 | Messaging Service Model | 2014 | Free for ISA |
| Part 7 | Alias Service Model | 2017 | Free for ISA |
| Part 8 | Information Exchange Profiles | 2020 | Free for ISA |
The S95 standard includes the PERA Reference Architecture for CIM (Appendix 1 of Part 1) and includes concepts from the PERA Handbook for Enterprise Integration.
This standard is explained further in the following presentations: