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Fast and stable: POWERLINK data transfer via slip ring

(PresseBox) (Eggelsberg, ) Machine modularization is imperative for economic efficiency. It calls for a decentralized architecture of automation solutions. Control and drive components therefore frequently need to be installed on moving machine parts, and occasionally on rotating parts. Their power and data supply relies on slip rings.

At the Nuremberg SPS/IPC/DRIVES show, the Ethernet POWERLINK Stand-ardization Group (EPSG) exhibited an assembly with ACOPOSmulti65 drives on a rotating machine part. With a Cobham slip ring, connectivity of the 24 V power supply and the 750 VDC DC bus as well as the control data was accom-plished using POWERLINK and openSAFETY.

As a first in industrial applications, data at a rate of 100 Mbit/s and the DC bus voltage were simultaneously transferred via the slip ring. "Our engineers were impressed with the stability and EMC compliance of the POWERLINK protocol," stated Martial Favrat, Head of the Engineering Department and Product Quality Manager at the slip ring manufacturer, Cobham. "We performed comprehensive tests so we can guarantee the transmission quality of our slip rings." POWERLINK uses individual frames, so data transfer reliability is naturally higher than that of protocols using summation frames.

POWERLINK and openSAFETY keep the automation world turning with series production applications using slip ring data transfer for drive and safety technology already implemented by B&R.

About Bernecker + Rainer Industrie Elektronik Ges.m.b.H.

The Ethernet Powerlink Standardization Group (EPSG) is an independent organization founded in 2003 by leading companies from the drive and automation industry. Its aims are the standardization and further development of POWERLINK, which was first introduced by B&R in 2001. The high-performance real-time communication system is a protocol extension of the IEEE 802.3 Ethernet standard, designed to ensure real-time data transfer on the microsecond level. EPSG cooperates with leading standardization organizations, such as CAN in Automation (CiA) and the IEC. Anton Meindl, BU Manager Controls at B&R, is the EPSG's CEO.

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