# ISO 10218-1 Technique Explanation UR e-Series
4 Collaborative
Operation 2011
edition, clause
5.10.5
Power and
force limiting
(PFL) by
inherent
design or
control
How to accomplish PFL is left to
the robot manufacturer. The
robot design and/or safety
functions will limit the energy
transfer from the robot to a
person. If any parameter limit is
exceeded, a protective stop
happens. PFL applications
require considering the ROBOT
APPLICATION (including the
end-effector and workpiece(s),
so that any contact will not
cause injury. The study
performed evaluated pressures
to the ONSET of pain, not injury.
See Annex A. See ISO/TR
20218-1 End-effectors.
UR robots are power
and force limiting
robots specifically
designed to enable
collaborative
applications where the
robot could contact a
person and cause no
injury. UR robots have
safety functions that
can be used to limit
motion, speed,
momentum, force,
power and more of the
robot. These safety
functions are used in
the robot application to
thereby lessen
pressures and forces
caused by the end-
effector and workpiece
(s).
Hardware Manual 99 UR5e
16.Table 2
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