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Design News, April 2013

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Automation & Control how the new solutions deliver signifi• More efficient shut downs and cant advantages to end users, OEMs, start ups; The rapid and system integrators. In the past, • Optimized performance. implemenTaTion of contactors were needed to turn these drives off — literally cut the power to An integrated safety and control disTribuTed shut them down — which can cause approach provides better visibility into conTrol and all kinds of problems. When you bring the functions than separate systems the system back up, will it know where perform; because the people managing, safeTy sysTems is it was when it shut down? monitoring, and operating the system leading To The With the built-in safety functions, a only need to learn one system, time and command is sent to the drive, allowing proliferaTion of money is saved, and safety enhanced. it to shut down in a controlled manFor the OEM and system integraner. It can either perform a safe stop or devices wiTh builT-in tor, if safety and control systems are a safe motion function. It can do difneTworked safeTy. integrated, there is no more secondferent aspects of turning off that drive guessing about whether commuor motor. Moreover, when it comes nications are going to work with a back on, it knows exactly where it was, which it wouldn't particular device. For instance, if there are two products if power to the entire drive had been cut. Now we are able from different manufacturers, many problems can ensue. to bring it down and up in a safe manner. Just integrating the safety system into a control tool could be a major problem. For the end user, the benefits of the integrated approach Seamless communication is an advantage of safety and are fourfold: controls converging in a complete package. It reduces • Improved control system reliability; manufacturing and engineering time. And it probably • Increased uptime; reduces the wiring time as well, because these new systems are designed to go together so there is no need to run individual wires to relays and contacts. All this will save time and money for both OEMs and integrators. Compact OEM Piston Pump Efficient • High Flow at Vacuum or Pressure with DC and Brushless DC Motors advanced oil-free pump technology - why settle for less? • 3.3 LPM • 30 psig • 22 in. Hg NPK04 Air & Gas BLDC model only 2.5" long Perfect for use in portable instruments. Lightweight, compact , mounts where you need it Clean, oil-free transfer - contamination-free High-efficiency design extends battery life For analyzers, medical devices, imaging, pneumatics DC or low EMI/RFI Brushless DC motor choices Small quantities available for prototyping use Your special OEM projects are always welcome Send for your FREE OEM Applications Selector! KNF NEUBERGER, INC. 2 Black Forest Road Trenton, NJ 08691-1810 609/890-8600 • Fax: 609-890-8323 www.knf.com/oempiston.htm S8 PUMPS Standards Are Catching Up Historically there has been a difference between Europe and the US in the application of safety standards. In Europe, the responsibility fell most squarely on the OEM, while in the US end users have covered it. This differentiation is likely to diminish as stronger standards emerge. As often happens, technology has moved faster than standards are developed and approved, so standards are usually playing catch up. But progress is being made, with globalization as a key driver. The globalization of manufacturing makes it imperative for OEMs to incorporate safety standards into their products. These must be globally accepted, but also flexible enough to be incorporated into existing systems. Safety system flexibility determines the ability to integrate with an existing infrastructure. This is especially important to users who need to integrate safety systems into plants with older equipment that fails to meet current safety standards. In markets where safety standards are constantly being evaluated and upgraded, selecting an appropriate safety integrity level (SIL) designation has often been confusing for users. The harmonization of international safety standards, including IEC 61508 and ISO 13849 in the European Union, has made this less confusing. Both ISO 13849 and IEC 61508 are based on simi- a U T OM aT I O N & c ON T R O L / a s U p p Le M e N T T O d e s I gN Ne ws A p ril 2013 [www.designnews.com]

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