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LEINE & LINDE Supports Safety Initiative and Provides Encoder Reliability Values

SCHAUMBURG, IL--(Marketwired - January 21, 2014) -  The issue of human safety according to the Machinery Directive 2006/42/EC is becoming more important as the global economy drives us toward common standards. As part of the worldwide Functional Safety initiatives for machinery, LEINE & LINDE is now supporting design engineers with reliability data for their 500 and 800 series encoders in support of this directive.

Common machinery functional safety applications are seen in industries such as oil & gas, process control, railways, mining, power generation, cranes, machine tools, etc.

To demonstrate adequate consideration of human safety concepts in machine design, engineers must be able to calculate either the performance level, PL, according to EN ISO 13849-1 or the PFHd value for the Safety Integrity Level, SIL according to IEC 61508.

To calculate the Performance Level, values for the Mean Time To (dangerous) Failure are needed for any single component of the safety system. Using the guidelines of 13489-1 supported by failure mode effects diagnostic analysis (FMEDA) or similar methodologies, the designer can determine the MTTFdvalue for the Functional Safety System.

The calculation of the SIL level for continuous operation of equipment is based upon the Probability of (dangerous) Failures per Hour, of PFHd.

To support these analyses, both PFHd and MTTFd values are now available when LEINE & LINDE 500 and 800 series encoders are used as the input components. 

Leine & Linde is based in Sweden with exclusive North American distribution through HEIDENHAIN Corporation in Schaumburg, IL. Leine & Linde is well known for offering high quality, heavy duty encoders of both the incremental and absolute type, product robustness, and are designed to cope with the harshest of environments such as those with high vibration, dirt and cold temperatures. These heavy, severe duty encoders are suited for drive and measurement applications and are often found in industries such as pulp and paper, forest and wood processing, agriculture, aggregate and mining equipment.

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