Jokab Safety Emergency stop General Product Line Information
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11:2
So that anyone shall be able to stop a machine during a machine break-down or if
someone is in danger.
Why do you need an
Emergency stop?
How do I recognise an E-stop?
E-stop buttons shall according to relevant standards be
red with a yellow background. An emergency stop grab
wire shall be red for high visibility. A sign that indicates the
location of the E-stop shall be green with a white picture
and possibly with text in the local country's language.
How shall an E-stop stop the machine?
An E-stop shall stop the machine as quickly as possible. To
obtain a quick stop one either removes the power directly
or one lets a frequency converter 'run down' and afterwards
after a little delay, remove the power. An E-stop shall not
create other hazards. Therefore a risk analysis must be made
for the E-stop to be correctly connected.
From 2006/42/EC, clause 1.2.4.3
...
This device must:
- have clearly identifiable, clearly visible and quickly
accessible control devices,
- stop the hazardous process as quickly as possible, without creating additional risks,
- where necessary, trigger or permit the triggering
of certain safeguard movements.
...
2006/42/EC The Machinery Directive
Clause 1.2.4.3 in Annex 1 gives requirements for the
emergency stop function for new machines). See also
clause 1.2.2 Control devices. (see chapter “Standard and
Regulations”)
Council Directive 89/655/EEC (with amendments)
concerning the minimum safety and health
requirements for the use of work equipment by
workers at work
Clause 2.4 gives the requirements for the emergency stop
function for older machines. See also clause 2.1. (see
chapter “Standard and Regulations”)
EN ISO 13850 Safety of machinery – Emergency
stop — Principles for design
A harmonized standard that gives technical specifications
for the requirements in the Machinery Directive. Could also
be used for older machinery.
EN 60204-1 Safety of Machinery - Electrical equipment of machines – Part 1: General requirements.
Harmonized standard that gives requirements for the electrical equipment of machinery including the emergency stop
actuator/function. Se clauses 9.2.2 and 9.2.5.4.2.
Requirements for E-stops are stated in the following standards and regulations
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