IEC 60947-5-5:1997/AMD2:2016

IEC 60947-5-5 ®
Edition 1.0 2016-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AM ENDMENT 2
AM ENDEMENT 2
Low-voltage switchgear and controlgear –
Part 5-5: Control circuit devices and switching elements – Electrical emergency
stop device with mechanical latching function

Appareillage à basse tension –
Partie 5-5: Appareils et éléments de commutation pour circuits de commande –
Appareil d'arrêt d'urgence électrique à accrochage mécanique

IEC 60947-5-5:1997-11/AMD2:2016-02(en-fr)

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IEC 60947-5-5 ®
Edition 1.0 2016-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AM ENDMENT 2
AM ENDEMENT 2
Low-voltage switchgear and controlgear –

Part 5-5: Control circuit devices and switching elements – Electrical emergency

stop device with mechanical latching function

Appareillage à basse tension –

Partie 5-5: Appareils et éléments de commutation pour circuits de commande –

Appareil d'arrêt d'urgence électrique à accrochage mécanique

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.99, 29.130.20 ISBN 978-2-8322-3183-8

– 2 – IEC 60947-5-5:1997/AMD2:2016
© IEC 2016
FOREWORD
This amendment has been prepared by subcommittee SC 121A: Low-voltage switchgear and
controlgear, of IEC technical committee 121: Switchgear and controlgear and their
assemblies for low voltage.
The text of this amendment is based on the following documents:
FDIS Report of voting
121A/60/FDIS 121A/72/RVD
Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
_____________
1 Scope
th
Delete, in the existing 4 paragraph “(see annex A)”.
th
Add, after the existing 4 paragraph, the following new paragraph and note:
This standard does not deal with any specific requirements on noise as the noise emission of
electrical emergency stop devices with mechanical latching function is not considered to be a
relevant hazard.
NOTE See also 9.2.5.4 of IEC 60204-1:2005.
2 Normative references
Delete, from the existing list, the references to IEC 60073:1996, modified by Amendment 1,
to ISO 3864 and IEC 60204-1.
Replace the existing reference to IEC 60068-2-1, modified by Amendment 1, by the following
new reference:
IEC 60068-2-1:2007, Environmental testing − Part 2-1: Tests − Test A: Cold
Replace the existing references to IEC 60068-2-2 modified by Amendment 1, IEC 60068-2-6,
IEC 60068-2-27, IEC 60068-2-30, IEC 60947-1 modified by Amendment 1, IEC 60947-5-1,
IEC 61310-1, and ISO 13850 by the following new references:
IEC 60068-2-2:2007, Environmental testing – Part 2-2: Tests – Test B: Dry heat

© IEC 2016
IEC 60068-2-6:2007, Environmental testing – Part 2-6: Tests – Test Fc: Vibration (sinusoidal)
IEC 60068-2-27:2008, Environmental testing – Part 2-27: Tests – Test Ea and guidance:
Shock
IEC 60068-2-30:2005, Environmental testing – Part 2-30: Tests – Test Db: Damp heat, cyclic
(12 h + 12 h cycle)
IEC 60947-1:2007, Low-voltage switchgear and controlgear – Part 1: General rules
IEC 60947-1:2007/AMD1:2010
IEC 60947-1:2007/AMD2:2014
IEC 60947-5-1:2016, Low-voltage switchgear and controlgear – Part 5-1: Control circuit
devices and switching elements – Electromechanical control circuit devices
IEC 61310-1:2007, Safety of machinery – Indication, marking and actuation – Part 1:
Requirements for visual, acoustic and tactile signals
ISO 13850:2015, Safety of machinery – Emergency stop function – Principles for design
Add the following new reference to the existing list:
IEC 60417-DB:2002 , Graphical symbols for use on equipment
3 Definitions
Replace the existing item under “D” modified by Amendment 1 by the following new item:
D
Direct opening action (of a contact element) . 3.9
Add the following new item under new ”P”:
P
Positive opening action (of a contact element) . 3.9
3.1
emergency stop (function or signal)
Replace the existing source by the following new source:
[ISO 13850:2015, definition 3.1, modified – extended to “emergency stop signal”, no use of E-
stop]
3.2
emergency stop device
Replace the existing definition and source by the following new definition, without modifying
the existing note:
manually operated control circuit device used to initiate an emergency stop function
_____________
“DB” refers to the IEC on-line database, available at: http://www.graphical-symbols.info/equipment.

– 4 – IEC 60947-5-5:1997/AMD2:2016
© IEC 2016
3.3
actuating system (of an emergency stop device)
Replace the existing definition and source by the following new definition and source:
mechanical parts which transmit the actuating force to the contact elements
[IEC 60050-441:1984, 441-15-21, modified – restricted to electromechanical emergency stop
devices; the note is not relevant anymore]
3.4
actuator (of an emergency stop device)
Replace the existing definition and source by the following new definition and source, without
modifying the existing note:
part of the actuating system which is actuated by a part of the human body
[IEC 60050-441:1984, 441-15-22, modified – actuation is intented to be achieved by human
only]
3.5
rest position
Replace the existing definition by the following new definition:
position of an emergency stop device, or of a part of it, which has not been actuated
3.6
actuated position
Replace the existing definition by the following new definition:
position of an emergency stop device, or of a part of it, after it has been actuated
3.8
resetting (of an emergency stop device)
Replace the existing note, modified by Amendment 1, by the following new note:
NOTE Examples of resetting include the rotation of a key, or of the actuator, pulling the actuator or pushing or
rotating a special reset button.
3.9
direct opening action (positive opening action) (of a contact element)
Replace the existing term, definition and source by the following new terms, definition and
source:
3.9
direct opening action (of a contact element)
DEPRECATED: positive opening action (of a contact element)
achievement of contact separation as the direct result of a specified movement of the switch
actuator through non-resilient members (for example not dependent upon springs)
[IEC 60947-5-1:2016, K.2.2, modified – addition of a deprecated term]
4.1 General
Replace the existing third dashed item in NOTE 1 by the following new dashed item:
– by a graphical symbol (see 4.2.2 or Table A.1 of IEC 61310-1:2007).

© IEC 2016
Delete the existing NOTE 2.
4.2.1
Replace the existing text by the following two new paragraphs and new figure:
Buttons used as emergency stop device actuators shall be coloured red. When a background
exists behind the actuator, it shall be coloured yellow.
Where a symbol is needed for clarification, the symbol IEC 60417-5638 (DB:2002-10) shall
be used (see Figure 2).
Figure 2 – Symbol (5638) for emergency stop
4.2.2
Replace the existing text and note as follows:
The direction of unlatching shall be identified when resetting is achieved by rotation of the
button. This identification shall have the same or nearly the same colour as the actuator in
order to avoid misinterpretation.
NOTE See also IEC 60073 and ISO 3864 series.
4.4 Additional requirements for colour coding
Replace the existing second paragraph, including the two dashed items, by the following:
Where coloured indicators are provided to assist setting of a trip wire switch:
– green shall indicate the correct setting of the rest position; and
– yellow shall indicate the correct setting of the actuated position.
5.1
Replace the existing paragraph of this subclause by the following new paragraph and note:
Depending on the associated devices, the utilization categories shall be one or more
categories selected from Table 1 of IEC 60947-5-1:2016.
NOTE For guidance refer to Annex K of IEC 60947-5-1:2016.
5.2
Replace the existing text of this subclause by the following new text:
All normally closed contact elements of an emergency stop device shall have a direct opening
action, in accordance with Annex K of IEC 60947-5-1:2016.
The tests shall be conducted according to Annex K of IEC 60947-5-1:2016.
...