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Secure KNX communication over IP

The picture shows the new IP routers of the Gamma instabus building system.

The new KNX IP Secure devices meet the increasing security requirements of KNX installations in intelligent buildings, which demand secure communication over networks. Security gaps in the building automation are thus avoided and manipulation of systems and equipment is reliably blocked. The new IP routers and IP interfaces ensure the highest data protection standards additionally through access protection via IP networks that effectively augments the conventional mechanical security measures.
The new developments help KNX system integrators and partners to fulfill the requirements of their customers for secure communication within a building or between buildings and for secure remote access. The KNX-specific Engineering Tool Software (ETS) secures both the runtime communication over IP as well as commissioning. Secure commissioning is also possible with the help of the removable device certificate label. This device certificate key, imprinted as a QR code for fast identification, allows the ETS to authenticate the device.
The high data security lends itself to the use of existing data networks for cross-line communications, especially in commercial buildings. A number of benefits and additional options emerge: fast communication between KNX lines, extension of a KNX system beyond a building through the use of LAN and WAN connections, direct transmission of KNX data to every network user, and KNX remote configuration of every network access point.
Last but not least, the new KNX IP Secure devices from Siemens are extremely flexible in terms of power supply. In addition to the conventional 24 V AC/DC power supply, they also support Power-over-Ethernet (PoE). This supplementary voltage provides for a minimal KNX bus current consumption of only around 4 mA.

For further information on Siemens Smart Infrastructure, please see
For further information on the Gamma instabus portfolio, please see
Siemens Smart Infrastructure (SI) is shaping the market for intelligent, adaptive infrastructure for today and the future. It addresses the pressing challenges of urbanization and climate change by connecting energy systems, buildings and industries. SI provides customers with a comprehensive end-to-end portfolio from a single source – with products, systems, solutions and services from the point of power generation all the way to consumption. With an increasingly digitalized ecosystem, it helps customers thrive and communities progress while contributing toward protecting the planet. SI creates environments that care. Siemens Smart Infrastructure has its global headquarters in Zug, Switzerland, and has around 71,000 employees worldwide.
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Siemens AG (Berlin and Munich) is a global technology powerhouse that has stood for engineering excellence, innovation, quality, reliability and internationality for more than 170 years. The company is active around the globe, focusing on the areas of power generation and distribution, intelligent infrastructure for buildings and distributed energy systems, and automation and digitalization in the process and manufacturing industries. Through the separately managed company Siemens Mobility, a leading supplier of smart mobility solutions for rail and road transport, Siemens is shaping the world market for passenger and freight services. Due to its majority stakes in the publicly listed companies Siemens Healthineers AG and Siemens Gamesa Renewable Energy, Siemens is also a world-leading supplier of medical technology and digital healthcare services as well as environmentally friendly solutions for onshore and offshore wind power generation. In fiscal 2018, which ended on September 30, 2018, Siemens generated revenue of €83.0 billion and net income of €6.1 billion. At the end of September 2018, the company had around 379,000 employees worldwide. Further information is available on the Internet at
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Catharina Bujnoch-Gross

Siemens AG

Theilerstrasse 1a
6300 Zug

+41 (79) 566-0778