Supplementary data
Operating Manual PNOZ s30
1001715-EN-19
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To calculate the safety function you will need the following data for the "sensor" subsystem
and "PNOZ s30" subsystem:
Sensor PNOZ s30 subsystem
Category MTTFd DC Operating mode PFH (1/h)
3 Manufac-
turer-specific
90 %
PNP/PNP
NPN/NPN
Monitoring
2 encoder
1,74E-09
4 99%
PNP/NPN
NPN/PNP
In a worst case scenario, the sensor subsystem's characteristic value MTTFd is calculated
from the inferior (lower) value of the two sensors.
13.3.9.3 Achievable safety level
Safety function PL in accordance with EN
ISO 13849-1: 2015
SIL CL in accordance with
ENIEC62061
Direction
Position
- -
Speed
Speed range
Standstill
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 encoder supply via track S
13.3.10 Safety characteristic data for operation with 2 proximity switches with
reduced diagnostics
13.3.10.1 Permitted encoder types and output signals
Non-safety-related rotary encoder
Permitted encoder types:
} Inductive proximity switches
Permitted output circuits:
} pnp
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