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BS EN IEC 60947-5-8:2021

BS EN IEC 60947-5-8:2021

$167.15

Low-voltage switchgear and controlgear – Control circuit devices and switching elements. Three-position enabling switches

Published By Publication Date Number of Pages
BSI 2021 34
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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.

PDF Catalog

PDF Pages PDF Title
2 undefined
7 Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
8 Annex ZZ (informative)Relationship between this European standard and the safety objectives of Directive 2014/35/EU [2014 OJ L96] aimed to be covered
9 English
CONTENTS
10 FOREWORD
12 1 Scope
2 Normative references
13 3 Terms and definitions
14 4 Classification
5 Characteristics
15 6 Product information
16 7 Normal service, mounting and transport conditions
17 8 Constructional and performance requirements
19 Figure 1 ā€“ Operation of three-position enabling switches
20 Figure 2 ā€“ Operating force, travel and enabling contact status
Table 1 ā€“ Force values for F2
21 9 Tests
28 Annex A (informative) Example of enabling devices incorporating a three-position enabling switch
Figure A.1 ā€“ Grip type enabling device
Figure A.2 ā€“ One hand teaching pendant type enabling device
29 Figure A.3 ā€“ Two hand teaching pendant type enabling device
Figure A.4 ā€“ Manual pulse generator
Figure A.5 ā€“ Grip type enabling device for hand-held machine
30 Figure A.6 ā€“ Foot actuated enabling device
Figure A.7 ā€“ Hoist controller
Figure A.8 ā€“ Joystick type enabling device
31 Annex B (normative) Procedure to determine reliability data for three-position enabling switches used in functional safety applications
32 Bibliography

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BS EN IEC 60947-5-8:2021
$167.15