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Encoderless safety function for motion control drive systems

The Siemens Drive Technologies Division has now also integrated the "Safely Limited Speed" (SLS) safety function into its Sinamics S110 and S120 motion control converters without using an encoder.

There is thus no longer any need for complex wiring, installation and commissioning of external encoders. The "Safely Limited Speed" function monitors the speed of induction motors, for example on winders in textile machines, in accordance with standard EN 61800-5-2.

The encoderless solution for implementing SLS is not only available for the Sinamics S110 and S120 frequency converters, but also for the Sinamics G120 and G120D inverters.

The Siemens Industry Sector (Erlangen, Germany) is the worldwide leading supplier of environmentally friendly production, transportation, building and lighting technologies. With integrated automation technologies and comprehensive industry-specific solutions, Siemens increases the productivity, efficiency and flexibility of its customers in the fields of industry and infrastructure. The Sector consists of six divisions: Building Technologies, Drive Technologies, Industry Automation, Industry Solutions, Mobility and Osram. With around 207,000 employees worldwide (September 30), Siemens Industry achieved in fiscal year 2009 total sales of approximately €35 billion.

The Siemens Drive Technologies Division (Nuremberg, Germany) is the world's leading supplier of products and services for production machinery and machine tools. This includes standard products but also encompasses industry-specific control and drive solutions. Integrated technologies along the entire drive train with electrical and mechanical components offer highest potential to reduce energy consumption in industrial plants. The services provided by the Division include mechatronics support in addition to online services for web-based fault management and preventive maintenance. With around 36,000 employees worldwide (September 30), Siemens Drive Technologies achieved total sales of €7.5 billion in fiscal year 2009.

Reference Number: IDT2010032316e

Julia Kauppert | Siemens Industry
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