IEC 60947-5-8:2020 ED2


Existing or new amendments and versions must be purchased separately.



IEC 60947-5-8:2020 is available as IEC 60947-5-8:2020 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition. IEC 60947-5-8:2020 specifies requirements for three-position enabling switches. These switches are used as components of enabling devices to provide signals that, - when activated, allow machine operation to be initiated by a separate start control, and - when de-activated, -- initiate a stop function, and -- prevent initiation of machine operation. This second edition cancels and replaces the first edition published in 2006. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - due to the increasing range of useful applications of three-position enabling switches, note of scope, operational characteristics and tests are reviewed; - figures for example of devices incorporating enabling switch are added in Annex A; - new Annex B for procedure to determine reliability data for the switch used in functional safety applications is added.

Products specifications

  • Standard from IEC
  • Published:
  • Edition: 2
  • Document type: IS
  • Pages
  • ISBN: 9782832286067
  • Publisher: IEC
  • Distributor: IEC
  • ICS: 29.130.20
  • International TC: TC 121/SC 121A

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