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WORLD OF INDUSTRIES 6/2019

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WORLD OF INDUSTRIES 6/2019

Connectivity for the

Connectivity for the production of tomorrow AUTOMATION Every operator wants to be able to use the data from existing systems for new technologies and thus benefit from the added value of cloud-based evaluations. The Namur Open Architecture (NOA) concept explains how this is possible without changing systems completely. key element is that the data diode should collect the important A data for the cloud applications and continue to ensure the security of the system. To ensure that this is possible, the devices that map the functionality of the data diode must be developed in accordance with security directives such as IEC 62443. To be able to install Industrie 4.0 technologies into an existing process-related system, the operation data must initially be collected. The objective is to not modify the system significantly. 6 WORLD OF INDUSTRIES 6/2019

The protocol: OPC UA for secure data transmission Although the working groups have only just started work, it can already be confirmed that the OPC UA technology will be used for the NOA concept. During the development of the OPC UA standard, security by design has played an important role when designing the Authors: Dipl.-Ing. Boris Waldeck, Senior Product Manager Automation Systems, and Dipl.-Ing. Thilo Glas, Senior Specialist Engineering in the Industry Management Process, Phoenix Contact Electronics GmbH, Bad Pyrmont, Germany architecture. OPC UA has a robust security model based on x.509 certificates. A global discovery server is responsible for handling the certificates. User/password mechanisms ensure that access rights are restricted so that certain groups of users can only read the data, for example. Signed and/or encrypted data transmission with various security policies is available for the communication between the client and server. The automation pyramid in the NOA concept is therefore expanded by a side channel that provides horizontal, secure, and impact-free access to the process data on all levels. The well-known automation pyramid is made up of four levels. However, it is not possible to establish cross communication between the lower sensor/actuator level and the upper control level (Fig. 1). Implementation of a cross-communication The NOA concept therefore adds a side channel to the automation approach used to date. Cross-communication can be established using this channel so that the operator can evaluate the 01 Standard automation pyramid with four levels is extended by a NOA side channel WORLD OF OF INDUSTRIES 6/2019 7

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