New standard on machine guards

Written by: Tom Shelley | Published:

BS EN ISO 13855:2010, "Safety of machinery -- Positioning of safeguards with respect to the approach speeds of parts of the human body" came into force on May 31st 2010, replacing BS EN 999:1998+A1:2008, which was withdrawn the same day. Changes include the explicit inclusion of certain physical interlocked guards.

The purpose of the standard is to establish 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 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 ISO 13855:2010 are time tested and proven in practical experience. The standard gives guidance for typical approaches. Other types of approach, for example running, jumping or falling, are not considered.

Safeguards that are considered include:
Electro-sensitive protective equipment, including light curtains and light grids (AOPDs), laser scanners (AOPDDRs) and two dimensional vision systems; pressure-sensitive protective equipment, especially pressure-sensitive mats; two-hand control devices and interlocking guards without guard locking.

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