What do the different standards and control marks on the products mean?


The CE marking confirms the conformity of the product with the corresponding essential requirements of all directives applicable to the product.

TÜV-this mark confirms that the product is suitable for its intended use and complies with relevant standards and guidelines.

UL products bearing this Mark are tested and registered by UL for the North American market; the certification is also valid for Canada. UL also monitors the production processes at WERMA.
Products labeled “Class 2” may only be used in circuits operated under UL Class 2.

EHEDG (European Hygienic Engineering and Design Group) is to develop and publish guidelines on hygienic engineering for food processing and packaging. Certification by this consortium confirms compliance with stringent design criteria to avoid constructive weaknesses and to minimize contamination risk.

The IPA certificate of the Fraunhofer Institute for Production Technology and Automation IPA is a control mark for products that have objectively qualified for cleanroom suitability according to recognized standards and guidelines.

ASI products designated with the AS-Interface certification logo (shadow logo) correspond to AS-Interface specifications (EN 50295, IEC 62026-2) and have been certified by the AS-International Association.

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