The EU’s revised Machinery Directive 2006/42/EC specifies that machine controls should be designed to ensure that they do not present hazards. This requirement is not new — it also appeared in the previous (1998) version of the Directive — but what is new is how this safety is to be achieved. Engineers dealing with mechanical design and plant construction are now caught between two new safety standards, EN ISO 13849 and EN IEC 61508, both of which require quantitative risk analysis.
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