EN 999:1998+A1:2008

Foreword
Introduction
1 Scope
2 Normative references
3 Definitions
4 Methodology
5 General formula for the calculation of minimum distances
6 Calculation of minimum distances for electro-sensitive
  protective equipment employing active opto-electronic
  protective devices
  6.1 Direction of approach normal to the detection zone
  6.2 Direction of approach parallel to the detection zone
  6.3 Direction of approach angled to the detection zone
  6.4 Dual position equipment
7 Method of calculating the minimum distances for ground level
  trip devices
  7.1 General method
  7.2 Floor mounting
  7.3 Step mounting
8 Two-hand control devices
Annex A (informative) Worked examples
Annex B (informative) Walking speeds and stride lengths
Annex ZA (informative) Relationship between this European
         Standard and the Essential Requirements of EU
         Directive 98/37/EC
Annex ZB (informative) Relationship between this European
         Standard and the Essential Requirements of EU
         Directive 2006/42/EC

1.1 This European Standard provides parameters based on values for hand/arm and approach speeds andthe methodology to determine the minimum distances from specific sensing or actuating devices of protectiveequipment to a danger zone.1.2 These specific devices are: Trip devices as defined in 3.23.5 of EN 292-1:1991 (specifically electro-sensitive protective equipment,including those used additionally to initiate operation, and pressure sensitive mats). Two-hand control devices as defined in 3.23.4 of EN 292-1:1991 and covered by EN 574.NOTE For the purpose of this standard hold-to-run controls, which are designed to be actuated with one hand, arenot considered to be protective equipment.1.3 This standard gives guidance based on the assumption that the correct device has been chosen either byreference to the appropriate Type-C standard or by carrying out a risk assessment.1.4 The calculated distances, when implemented, will provide sufficient protection for persons against therisks caused by approaching a danger zone which generate any of the following mechanical hazards, such as:Crushing, shearing, cutting or severing, entanglement, drawing-in or trapping, friction or abrasion, stabbing orpuncture and impact.Protection against the risks from mechanical hazards arising from the ejection of solid or fluid materials andnon-mechanical hazards such as toxic emissions, electricity, radiation etc. are not covered by this standard.