Brochure

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The correct HMI selection is crucial for the reliability of
safety-related functions. The terminology used and the
characteristics of emergency stop switches is clearly ex-
plained below. EAO offers an extensive range of intuitive
and reliable emergency stop and stop switches to meet the
requirements of a wide variety of applications.
Emergency stop or emergency off?
When used in Germany the two functions (1) emergency off is
equal to switching off, interrupting the energy supply and (2)
emergency stop is equal to stopping or shutting down mov-
ing machine parts. These two functions are often subsumed
under the term “emergency off”, which sometimes leads to
confusion – even among experts. The term “emergency off”
is used as the German equivalent of the English term “emer-
gency switching off”. However, there have been, and still
are, German standard editions which also incorrectly use
the English term “emergency stop” for the expression
“emergency off”. To this day, the German version of DIN EN
60947-5-5 mistakenly uses the term “emergency off” for the
English term “emergency stop”, which actually describes
the emergency stop.
ISO 13850 corrected this in 2016 and speaks of emergency
stop. In the new version of the Machinery Directive
(2006 / 42 / EC and 2009 / 127 / EC), the wrong term was also
replaced with emergency stop.
Emergency stop = Stop in an emergency
Emergency off = Switching off in an emergency
EAO Emergency Stop and Stop Switches.
Safe, intuitive and reliable.
Intuitive EAO emergency stop switches reliably protect
end users from injury and equipment from damage – even
in harsh environments and space critical applications.