Datasheet

Relays for functional safety
Safety relays PNOZsigma
PNOZ s30
Pilz GmbH & Co. KG, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
Telephone: [phone], Telefax: [phone], E-Mail: [e-mail]
2016-09
885
Safety-related architecture
Sensor
proximity switch
Actuator
SRP/CS
Actuator
SRP/CS
Sensor
PNOZ s30
Logic
+
Diagnostic
SRP/CS
Logic
Sensor
proximity switch
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)
4 Manufacturer-
specific
90 % Monitoring
2 encoders
1,44E-09
In a worst case scenario, the sensor subsystem's characteristic value MTTFd is calculated
from the inferior (lower) value of the two sensors.
Achievable safety level
Safety function
PL in accordance with EN
ISO 13849-1: 2015
SIL CL in accordance with
ENIEC62061
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