Supplementary data
Operating Manual PNOZ m EF 2MM
1003107-EN-10
59
To calculate the safety function you will need the following data for the "sensor" subsystem
and the subsystem "PNOZ m EF 2MM":
Sensor
Subsystem PNOZ m EF 2MM
Category MTTFd
DC
Operating mode
PFH (1/h)
4
Manufacturer-
specific
90 % Monitoring
2 sensors
1,35E-09
In a worst case scenario, the sensor subsystem's characteristic value MTTFd is calculated
from the inferior (lower) value of the two sensors.
The values for
DC
refer to the standard EN 61508.
9.1.9.3
Achievable safety level
Monitoring function
PL of EN ISO 13849-1:
2015
SIL CL in accordance with
EN IEC 62061
SOS-M
SDI-M
SS2-M
-
-
SSR-M
SSM
SS1-M
SLA-M
SAR-M
PL e (Cat.4)
3
Please note:
Common cause failures (CCF) are possible for the sensor subsystem. An appropriate ana-
lysis must be carried out.
To use proximity switches 1 and 2 we recommend that you:
}
Use different technologies/design or physical principles (e.g. different manufacturers)
and
}
Evaluate the sensor supply via track S
