Strängnäs, Sweden – An explosive atmosphere may occur in many heavy-duty industries where encoders are used to provide position and speed feedback. To combat that, encoders that conform to ATEX directives should be used to increase safety in potentially explosive atmospheres. Leine & Linde’s product range of encoders in their 300, 500, 600 and 800 series conform to ATEX, specifically for lower Zones (2/22), and are now available in North America for use in these environments.
ATEX is an acronym for ATmospèhere EXplosible (French, “explosive atmosphere”). It is a commonly-recognized European Union directive that sets out a detailed code for products used in hazardous locations. The ATEX directive states that the construction must protect against penetration of dust in hazardous quantities and guarantee that the surface temperature is below the ignition temperature of dust/air mixtures and below the smoldering temperatures of dust deposits. The construction must minimize the occurrence of arcs, sparks and hot surfaces, which in normal operation might increase the risk of explosion.
These types of encoders are gaining increasing popularity as machine safety issues are becoming more important. It is well known that when used in hazardous environments, electronic devices must be handled with special care – even a tiny spark can have fatal consequences. The energy contained within the encoder circuit must not be allowed to ignite vapors and gases in the environment. An ATEX encoder shields against ignition.
Leine & Linde
Filed Under: Motion control • motor controls, Safety systems + components