In addition to a standard frequency converter and a microprocessor control system, the EFA-SRT EX for internal use comprises all the typical basic features of modern door technology, such as dynamic door tension and emergency opening via spring systems in the frame members. A hand lever on the frame member allows quick emergency opening of the door system in the event of a power failure. The door leaf is formed by a black, non-transparent special ATEX curtain.
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The EFA-SRT EX has been developed in accordance with ATEX Directive 2014/34/EU specifically for use in potentially explosive atmospheres for Zone 1 (II 2G IIB T4 GbX), Zone 2 (II 3G IIB T4 GcX), Zone 21 (II 2D IIIB 135°C DbX) and Zone 22 (II 3D IIIB 135°C DcX). The control cabinet must be installed outside the explosion protection zone.