Power-operated guards
"Where guards are power operated they shall not be capable of causing injury (e.g. from contact
pressure, force, speed, sharp edges). If an isolating or a non-isolating protective device is tted
which automatically initiates a reopening of the non-isolating protective device as soon as a
person or an object comes into the contact with the isolating protective device, the closing force
must not exceed 150 N and the kinetic energy of the isolating protective device must not exceed
10 J. If no such protective device is tted these values shall be reduced to 75 N and 4 J,
respectively. These values only apply if there is a wide closing edge and no risk of cutting or
shearing."
Machine tools – Safety – Turning machines
EN ISO 23125:2015 Machine tools safety – Turning machines, Type C standard
Section 5.2.2.2 b) "For power-operated guards"
Excerpt from ISO 23125:2015, Section 5.2.2.2 b):
"3) the force to prevent the guard from closing shall not exceed 75 N and the kinetic energy of
the guard shall not exceed 4 J. When the guard is tted with a protective device which
automatically initiates reopening of the guard on actuation, this may be a maximum of 150 N
and the kinetic energy a maximum of 10 J;"
Injection molding machines
EN 201:2009 Plastics and rubber machines – Injection molding machines – Safety requirements;
Type C standard
Section 5.8.10 "Power operated guards"
Excerpt from DIN EN 201:2009, Section 5.8.10:
"For power operated guards the following additional requirements shall apply:
• where there are contact forces more than 75 N and less or equal to 150 N, a pressure sensitive
edge in accordance with EN 1760-2:2001+A1:2009 shall be supplied. Actuation of the
sensitive edge shall stop the closing movement of the guard in accordance with EN ISO
13849-1:2008, PLr = c;
• where there are contact forces more than 150 N, these shall not exceed 300 N and a pressure
sensitive edge in accordance with EN 1760-2:2001+A1:2009 shall be supplied. When the
pressure sensitive edge is activated, the closing movement of the disconnecting protection
equipment must be shut down in accordance with EN ISO 13849-1:2015, PLr = c and must
allow the motion into the opposite direction without additional danger. Closing the
disconnecting protection equipment must take place through a controller with automatic
resetting mechanism in accordance with EN ISO 13849-1:2015, PLr = c; …"
Appendices
A.4 Standards, directives and laws
ATD4xxW for industrial applications
System Manual, 06/2022, A5E51901827B AA 343
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