Technical details
Operating Manual PNOZ m EF 4DI4DOR
1002702-EN-08
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CAUTION!
It is essential to consider the relay's service life graphs. The relay outputs'
safety-related characteristic data is only valid if the values in the service life
graphs are met.
The PFH value depends on the switch frequency and the load of the relay output.
If the service life graphs are not accessible, the stated PFH value can be used irrespective
of the switch frequency and the load, as the PFH value already considers the relay's B10d
value as well as the failure rates of the other components.
8.2
Classification according to ZVEI, CB24I
The following tables describe the classes and specific values of the product interface and
the classes of interfaces compatible with it. The classification is described in the ZVEI posi-
tion paper "Classification of Binary 24 V Interfaces - Functional Safety aspects covered by
dynamic testing".
Input
Interfaces
Drain
Interface
Module
Class
C2
Source
Interface
Sensor
Class
C2, C3
Drain parameters
Test pulse duration, safety outputs
500 µs
Min. input resistance
5,6 kOhm
Max. capacitive load
126 nF
