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WORLD OF INDUSTRIES - Industrial Automation 4/2017

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  • Automation
  • Industrial
WORLD OF INDUSTRIES - Industrial Automation 4/2017

Clever switching devices

Clever switching devices for all usage ranges COMPONENTS AND SOFTWARE It is hard to imagine a world without switches. Of course, gas or candle lighting could provide ample lighting in factories where the workers manufacture the products by hand again. And this is the situation that would actually present itself if electrical switching devices were not used. The right portfolio from Phoenix Contact contributes to automated and therefore cost-effective production. When examining the importance of switching devices in automation technology, it quickly becomes clear that although unspectacular, they significantly influence the function of the overall system. In the world of interfaces, important technological developments have taken place almost unnoticed with relay and semiconductor switches, which decisively influence the performance of modern automation systems. It is therefore time to present the actual stars of the automation world with their special performance spectrum. The individual features of the switching About Phoenix Contact The family owned company is based in Blomberg, Germany and generated a turnover of 1,97 billion Euros in 2016. The company has its own production sites in 10 countries, a global network of more than 50 sales subsidiaries and more than 40 local agencies, employing about 15,000 people worldwide. It is amongst the top global players and innovators in the field of electrical engineering and automation. device are adapted either specifically to the variety of the respective applications or designed so universally that they can serve a range of applications equally. Link between controllers and field level As a universal link between controllers and field level, top hat rail mounted coupling relays serve as potential separation, power amplification, and contact multiplication. The compact, modular structured relay system PLC-Interface saves a lot of space in the control cabinet, and offers the right solution for every application thanks to its comprehensive portfolio. Mounting and wiring are facilitated and sped up by the system accessories with plugin bridges for convenient potential distribution, marking material for a unique designation, as well as adapters for quick connection with the controller. Special sensor and actuator versions are used to bridge the supply of the connected periphery directly to the coupling relay. In this way, all connections are at the interface so that separate potential distributors are unnecessary. Best electric key values, in combination with a long service life and trouble-free replacement of the relay in the case of wear, ensure the high reliability of the automation system. Contrary to the coupling relay from modular systems with pluggable input circuit, the PLC relays are always equipped with an integrated circuitry, for example, for protection against polarity reversal and limitation of the switch-off overvoltage of the coil. Safe isolation between input and output in accordance with EN 50178 prevents danger to persons and machines. IP67-proof relays and optocouplers are reliable in nearly all applications against external influences such as moisture, dust, or aggressive ambient conditions. The sealed housing keeps the harmful influencing factors away from the relay mechanism and the contact surfaces. Author: Dipl.-Ing. Frank Herden, Head of Digital Interface Components, Phoenix Contact Electronics GmbH, Bad Pyrmont WORLD OF INDUSTRIES – INDUSTRIAL AUTOMATION 4/2017

02 PLC logic controls up to 48 I/O modules: modular, flexible and compact 01 PLC Interface for field wiring with convenient device connection and low space requirements 03 The Rifline complete relay system encompasses all relevant designs Small yet independent and intelligent As soon as additional intelligence or independence is demanded, the programmable logic relay system PLC logic is employed. It is simply plugged onto the standard PLC-Interface as a compact small-scale controller. 16 in- and outputs, installed within an overall width of only 50 millimeters, manage the automation tasks in the smallest space. Eight I/Os can be freely selected – regardless of whether analog or digital signal, in- or output. The basic module can be extended by two extension modules, which is why up to 48 I/O signals can be acquired and switched. The intuitively run software Logic+ allows for a quick programming of the logic relay systems, which any electrician can carry out without special training. To do so, he only needs to have general knowledge of circuitry and digital technology. The programming languages ladder diagram (LD) and function block diagram (FBD) are created, for example, by drag & drop selection of the respective function blocks and their connections. The entire program can then be simulated and tested both offline and online. The scope of applications range from building automation to decentral machine or system components in factory automation. When timing is what matters Rifline complete is the perfect solution if the user needs pluggable standard coupling relays with up to four changeover contacts. From the six millimeter narrow closer to the robust 3 × 16 A contact, the industrial relay system encompasses all tried and tested designs. As with the PLC relay, uniform plug-in bridges are available here for potential connections, universal marking material, as well as adapters for easy connections to the controller. The push-in technology allows for quick wiring without tools. If necessary, the controller side is protected by pluggable input modules against high induced voltages, the switch status of the relay is signaled by LED or the coupling relay is turned into a time relay in an instant, by plugging on a multifunctional time module. From three time functions, the user can select a time range from 0.5 seconds to 100 minutes. Ward off danger reliably When it comes to the protection of persons and machines, the safety relay modules prove themselves as essential components of the application. From emergency stop to speed monitoring, the PSR product range implements the requirements of numerous industrial fields while saving space. The space requirements in the control cabinet can be further reduced with the PSRmini coupling relay, which features certified force-guided contacts in accordance with EN 50205. At the same time, the narrowest SIL coupling modules in the world encompass the performance of devices in standard overall width. The compact housing dimensions result from a relay technology that has been newly developed by Phoenix Contact. The minimized elementary relay installed in the coupling module is also impressive due to the low power consumption of its drive system as well as large power density and system availability. The optimized load contact ensures a high short-circuit withstand capability. Through its compatibility with various sensors and controllers, the PSRmini shows that it is optimally suited for use in machine building and the process industry. A comprehensive approval package allows the use of the safety relay modules also in areas where the ambient conditions set requirements going beyond the standard. Control is essential Even though we trust the fault-free functioning of the system, it is still essential to monitor important system parameters. This is why the monitoring relays of the EMD product range record all important parameters such as voltage, current, performance, and temperature. They can be conveniently adjusted using rotary switches mounted on the front of the housing. Deviations from central setpoint definitions are reliably reported, which ensures the desired process sequence. For many users of monitoring relays, control of the input voltage during the feed-in in machines is a top priority, because voltage fluctuations in the mains power supply or an incorrect phase sequence can cause damage to the installed components. The EMD modules therefore detect faults early during operation, in this way avoiding unplanned machine or system standstills. The relays themselves can be clearly diagnosed by status LEDs. Photos: Phoenix Contact GmbH & Co. KG 04 The NSR elementary relays form the basis for safety in the smallest space WORLD OF INDUSTRIES – INDUSTRIAL AUTOMATION 4/2017


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