Pilz PZE 9 - Supplementary Data; Service Life Graph

PZE 9
Operating Manual PZE 9
1001635-EN-05
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Supplementary data
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 switching frequency and the load on the relay output.
If the service life graphs are not accessible, the stated PFH value can be used irrespective
of the switching 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.
Service life graph
The service life graphs indicate the number of cycles from which failures due to wear must
be expected. The wear is mainly caused by the electrical load; the mechanical load is negli-
gible.
Cycles x 1000
Switching current (A)
Ejemplo
} Carga inductiva: 0,2 A.
} Categoría de uso: AC15
} Vida útil de los contactos: 4000000 ciclos
Mientras la aplicación que se vaya a realizar necesite menos de 4000000 ciclos, puede
calcularse con el valor PFH (véase Datos técnicos).
Prever una extinción de chispas suficiente en todos los contactos de salida para prolongar
la vida útil. En caso de cargas capacitivas, controlar las puntas de tensión que puedan
crearse. Utilizar diodos volantes para la extinción de chispas de contactores DC.