Supplementary data
Operating Manual PNOZ m EF 1MM
1003108-EN-11
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9
Supplementary data
9.1
Categories
9.1.1
Safety level
The maximum achievable safety level depends, among other things, on the sensor, the wir-
ing and the operating mode of the PNOZ m EF 1MM.
INFORMATION
The safety-related characteristic data of the PNOZ m EF 1MM and all other
devices that are used must be taken into account when calculating the
safety level. We recommend that you use the PAScal software tool to calcu-
late the safety function's SIL/PL values.
The safety assessments below only consider the subsystems
Sensor
and
PNOZ m EF 1MM. The
Actuator
subsystem depends on the application and
must also be considered in the overall assessment.
Information on the safety-related characteristic data for the subsystems
Sensor
and PNOZ
m EF 1MM
Example:
Sensor subsystem
Subsystem PNOZ m EF 1MM
Category
MTTFd
DC
Operating mode
PFH [1/h]
2
Manufac-
turer-spe-
cific
90 %
Monitoring
1 sensor
1,83E-08
The values for
Category
and
DC
can be set for the sensor subsystem, bearing in mind the
restrictions stated in the respective chapter. The MTTFd value must be stated by the
sensor manufacturer.
The values for
DC
refer to the standard EN 61508.
Assuming that all faults are dangerous, MTTF = MTTFd can be set.
The characteristic value MTTF is a property of the sensor, which may only be stated by the
manufacturer.
Forced dynamisation:
When monitoring sensors with square output signals (TTL, HTL) or safe sensors, the axis
must be moved within 8 hours so that the signal changes on all the connected tracks.
Key:
SRP/CS = Safety-related part of a control system (EN 13849-1, Tab. 2)
