Breaking through to another world

A new AS-Interface twin cable and contact system for IP20 environments

In the harsh environs of industrial applications requiring IP6x levels of protection, AS-Interface has long become established as the standard for automation technology. This is in large part due to its relatively low cost, of course. Now, however, the successful actuator sensor bus is becoming an attractive alternative for the relatively sheltered IP20 world as well. The combined cable and interface system developed jointly by Leoni and Weidmüller now makes it possible for users to profit from the numerous AS-i advantages not only outside but also inside the switching cabinet. How? Quite simply by providing a savings of 75 per cent over conventional installation times and a reduction of around 40 per cent over the usual cabling costs.

Like its IP6x counterpart, the new Leoni profile cable for switching cabinets transmits data and power simultaneously over the two wires of the self-same conduit. The present version designed for IP20 environs does offer some new features, however. The outer jacket, for instance, is made of flame retarding non-corrosive plastic (FRNC), is halogen-free, and protected against reverse voltage. A specially designed nose and nose piece provide for easy installation as well as for protection against possible damage to the strands when inserted incorrectly.

The appropriate interfacing system for the Leoni IP20 profile cable was developed by Weidmüller, who are also members of the AS-International Association.  With the help of some innovative simulation testing, Weidmüller was able to optimize the contour of the new piercing contact in such a way that the insulation material can now be penetrated with the greatest of ease. At the same time, however, the contact pressure of the wire onto the contour is maximized at the moment of contact, thus minimizing the likelihood of the wire coming loose after the connection.

So what’s the bottom line? The new contact system will save time, money and space. And there's the added advantage that AS-Interface users know so well from the field: retrofitting the switching cabinet with actuators and sensors no longer represents even the slightest problem.

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