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Ansteuerung und Diagnose von Magnetventilen

Der Stromtreiber ES-ITD der Schaeper Automation GmbH in Hannover wird zur Ansteuerung von Magnetventilen und Hubmagneten eingesetzt. Nach der Inbetriebnahme, die durch eine Klartextanzeige erleichtert wird, wird der Strom auf etwa 60% des Nennstroms, den sog. Haltestrom reduziert. Dadurch wird eine geringere Temperatur erreicht, was eine längere Lebensdauer der Wicklung zur Folge hat.

Ausgestattet mit zahlreichen Diagnosefunktionen, erfolgt diese ohne weitere Sensoren und zusätzliche Leitungen. Sowohl Kurzschluss als auch Stromunterbrechung in der Zuleitung zum Magneten werden als Fehlermeldung heraus gegeben. Auch eine zu geringe Versorgungsspannung führt zu einer Meldung, die sich in gelb und rot gefärbten LEDs in der Klartextanzeige äußert. Darüber hinaus wird die korrekte Ankerbewegung überwacht: Ein klemmender Anker wird ebenso erkannt wie ein Anker, der die Arbeitsendlage noch nicht erreicht hat oder ein Anker, der eine zu lange Anzugszeit benötigt.

Der Stromtreiber ES-ITD, der auch für den Einsatz in IT-Versorgungsnetzen geeignet ist, bietet vielfältige Vorteile bei seiner Nutzung. So sorgt neben den bereits erwähnten Diagnosefunktionen die Überspannungsbegrenzung beim Abschalten der Ventile für eine höhere Lebensdauer der Versorgungsnetzteile. Außerdem trägt die reduzierte Temperatur an den Magnetventilen zu deren höherer Lebensdauer bei und durch die platzsparende Bauform verbrauchen auch die Netzteile weniger Energie.

Die Schaeper Automation GmbH entwickelt und fertigt bereits seit 1975 elektronische Geräte zur Steuerung und Überwachung von Kranen und elektrischen Antrieben. Zu den Kunden zählen Stahl- und Hüttenwerke im In- und Ausland.

Quelle und Fotos: Schaeper GmbH

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