BS EN ISO 13855:2010

Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions, symbols and abbreviated terms
4 Methodology
5 General equation for the calculation of the overall
  system stopping performance and minimum distances
6 Calculation of minimum distances for electro-sensitive
  protective equipment employing active opto-electronic
  protective systems
7 Method of calculating the positioning of pressure-sensitive
  mats or floors
8 Two-hand control devices
9 Interlocking guards without guard locking
Annex A (informative) - Worked examples
Annex B (informative) - Termination of hazardous machine
        functions
Annex C (informative) - Example for considering indirect
        approaches
Annex D (informative) - Measurement and calculation of
        overall system stopping performance
Annex E (informative) - Number of beams and their height
        above the reference plane
Bibliography
Annex ZA (informative) - Relationship between this
         International Standard and the Essential
         Requirements of EU Directive 2006/42/EC

Describes the positioning of safeguards with respect to the approach speeds of parts of the human body.

This International Standard establishes the positioning of safeguards with respect to the approach speeds of parts of the human body. It specifies parameters based on values for approach speeds of parts of the human body and provides a methodology to determine the minimum distances to a hazard zone from the detection zone or from actuating devices of safeguards. The values for approach speeds (walking speed and upper limb movement) in this International Standard are time tested and proven in practical experience. This International Standard gives guidance for typical approaches. Other types of approach, for example running, jumping or falling, are not considered in this International Standard. NOTE1 Other types of approach can result in approach speeds that are higher or lower than those defined in this International Standard. Safeguards considered in this International Standard include: electro-sensitive protective equipment [see IEC61496 (all parts)], including: light curtains and light grids (AOPDs); laser scanners (AOPDDRs) and two-dimensional vision systems; pressure-sensitive protective equipment (see ISO13856-1, ISO13856-2 and ISO13856-3), especially pressure-sensitive mats; two-hand control devices (see ISO13851); interlocking guards without guard locking (see ISO14119). This International Standard specifies minimum distances from the detection zone, plane, line, point or interlocking guard access point to the hazard zone for hazards caused by the machine (e.g. crushing, shearing, drawing-in). Protection against the risks from hazards arising from the ejection of solid or fluid materials, emissions, radiation and electricity are not covered by this International Standard. NOTE2 Anthropometric data from the 5th to the 95th percentile of persons of 14years and older were used in the determination of the intrusion distance value “C” in the equations. NOTE3 The data in this International Standard are based on experience of industrial application; it is the responsibility of the designer to take this into account when using this International Standard for non-industrial applications. NOTE4 Data specifically for children have not been used in this International Standard. Until specific data are available for approach speeds for children, it is the responsibility of the designer to calculate the distances taking into account that children might be quicker and that a child might be detected later. The International Standard is not applicable to safeguards (e.g. pendant two-hand control devices) that can be moved, without using tools, nearer to the hazard zone than the calculated minimum distance. The minimum distances derived from this International Standard are not applicable to safeguards used to detect the presence of persons within an area already protected by a guard or electro-sensitive protective equipment.