12
7 Safety characteristics
Characteristics
Value
Performance level
PL e
Category
cat. 4
(with appropriate monitoring)
MTTF
d
214 years
Mission time T
21 years
Annual Usage
8 cycle per hour/24hours per day/365 days
B10
d
1.5 • 10
6
cycles at
100mA load
These calculations were made on the basis of an ambient temperature of 40 °C.
The device meets the requirements of EN ISO 13849-1: 2008 category 4 / PL e and can be
used in applications up to PL e.
For the PFD-/PFH values and the MTTF
d
values of the other components see the respective
documentation.
Explanation of the abbreviations:
PL
Performance Level
Capability of safety-related parts to
perform a safety function at predictable
conditions to fulfill the expected risk
reduction.
Cat.
Category
Classification of the safety-related parts of
a controller as regards their resistance to
failures.
T
Mission time
Max. service life
B10
d
Number of cycles, up to 10% of the
components with dangerous failure.
MTTF
d
Mean Time To Dangerous
Failure
