Redundancy Modules for Potentially Explosive Areas

Puls, a manufacturer of DIN rail power supplies, has been granted Atex approval for its ranges of redundancy modules, allowing them to be used in potentially explosive environments. Redundancy modules are used to back up critical devices in the event of the main source of power being interrupted. The units have been tested to EN 60079 - 15 and are approved for use in Class 1 Zone 2 Category 3G explosive atmospheres. According to the company, no electrical changes were necessary to achieve the approval and the standard had been met by dual conformal coating the internal components of the units.

Puls added that the six Atex-approved modules, which range in output from 10A to 80A, will not increase in price despite the higher specification. Atex, which derives its name from the French Atmosphere Explosif, is the framework for controlling explosive atmospheres and the standards of equipment and protective systems used in them. By achieving EN 60079 - 15 approval, the company can now supply redundancy modules in this sector of the market.

An explosive atmosphere is created when dust, mist or gases become mixed with the air and produce a flammable substance. Many industrial environments may contain, or have the potential to produce, an explosive atmosphere. Examples include places where production activities create or release flammable gases or vapour, such as paint spraying, or in factories handling fine organic dusts such as grain flour or wood.

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