The following table may be used to determine the acceptable PLr from these parameters.
5.4.4
Achieving the required Performance Level
Because all hazards intrinsic to the Eurover design are addressed by safety functions with
PLc
performance, alternative or uprated safety functions are only required if an application-
specific risk assessment identifies any of the following:
-
Hazards requiring safety functions not provided for in the standard Eurover design.
-
Hazards which are sufficiently serious and/or frequent as to require safety functions
with
PLd
performance or above.
-
Corporate policies, union contracts, OSH regulations or other external factors which
require all safety functions to have
PLd
performance or above.
In this case, information about the risk assessment and required safety parameters should be
provided to Simpro before placing an order. Simpro can then specify alternative or uprated
safety functions, such as:
-
Full cage guarding
-
Interlocked safety door
-
CAT3 or CAT4 monitoring system
-
Remote controls
-
Training of operators
-
Signage and floor markings
Safety Function PLr Determination Table
Severity of injury
expected from hazard
Frequency and/or duration
of exposure to hazard
Possibility of manually
avoiding the hazard
Minimum
acceptable PLr
Slight injury (reversible)
Seldom to quite often
and/or short exposure time
Possible under specific
conditions
PLa
Scarcely possible
PLb
Frequent to continuous
and/or long exposure time
Possible under specific
conditions
Scarcely possible
PLc
Serious injury or death
(irreversible)
Seldom to quite often
and/or short exposure time
Possible under specific
conditions
Scarcely possible
PLd
Frequent to continuous
and/or long exposure time
Possible under specific
conditions
Scarcely possible
PLe
