Users of this document shall take into account the following constraints to avoid misunderstanding or wrong expectations regarding safety-related developments and applications.

NOTE 1 This includes for example use for training, seminars, workshops and consultancy.

The communication technologies specified in this document shall only be implemented in devices designed in accordance with the requirements of the relevant safety standards.

The use of communication technologies specified in this document in a device does not ensure that all necessary technical, organizational and legal requirements related to safety-related applications of the device have been fulfilled in accordance with the requirements of the relevant safety standards.

For a device based on this document to be suitable for use in safety-related applications, appropriate functional safety management life-cycle processes according to the relevant safety standards shall be observed. This shall be assessed in accordance with the independence and competence requirements of the relevant safety standards. Safety-related applications of the device can be subject to local regulations and legal requirements.

NOTE 2 Examples for relevant safety standards include the IEC 61508 series, IEC 61511, IEC 602041, IEC 62061, ISO 13849-1 and ISO 13849-2.

The manufacturer of a device using communication technologies specified in this document is responsible for the correct implementation of the standard, the correctness and completeness of the device documentation and information.

Additional important information including corrigenda and errata published by the OPC Foundation or PI shall be considered for implementation and assessment.

It is strongly recommended that implementers of this document comply with the appropriate conformance tests and validations provided by the related technology-specific organization.

NOTE 3 These requirements and recommendations are included because incorrect implementations could lead to serious injury or loss of life.