Skip to main content

Companion Specification Safety over OPC UA



This specification explains the relevant principles of functional safety for communication with reference to the IEC 61508 series as well as IEC 61784-3 and others and specifies a safety communication layer based on the OPC Unified Architecture.

Safety over OPC UA do this in such a way that OPC UA can be used for applications requiring functional safety up to the Safety Integrity Level (SIL) 4.

The resulting SIL claim of a system depends on the way implementation of Safety over OPC UA is implemented within this system. That means that if a certain SIL is desired, this specification has to be implemented on a device which fulfils the requirements for this SIL as described in IEC 61508. In particular, measures against random hardware failures and systematic errors (e.g. software bugs) must be taken.


Version: Draft RC1.0
Order No.: 2.782
Language: English

This draft is published for testing and review only. It must not be used for development purposes.

Comments to be submitted to, until July 23, 2019.

# Date Filename Type Size
18/04/2019 Safety_over_OPC_UA_2782_RC10_Mar19.pdf pdf 2 MB

Unsere bekannten Technologien


PROFIBUS ist ein standardisiertes, offenes, digitales Kommunikationssystem für alle Anwendungsbereiche der Fertigungs- und Prozessautomatisierung.





PROFINET ist der innovative offene Standard für Industrial Ethernet. Es erfüllt alle Anforderungen der Automatisierungstechnik.





IO-LINK ist eine eigenständige Sensor/Aktor-Interface-Lösung für den Einsatz in allen Automatisierungstechniken.