Pilz PZE X4VP8 24VDC 4n/o - Manual (Page 14)

PZE X4VP8
Operating Manual PZE X4VP8
1003206­EN­06 14
Supplementary data
CAUTION!
It is essential to consider the relay's service life graphs. The relay outputs'
safety­related 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.
10
1
10 100 1000 10000
0.1
DC1: 24 V
DC13: 24 V
AC15: 230 V
AC1: 230 V
D
Nennbetriebstr
om (A)
GB
Nominal operating current (A)
F
Courant coupé (A)
E
Corriente nominal de ser
vicio (A)
I
Corrente di eser
cizio nominale (A)
NL
Nominale bedrijfsstr
oom (A)
D Schaltspielzahl x 10 3
GB Cycles x 10
3
F Nombre de manœvres x 10 3
E Número de ciclos x 10 3
I Numero dei cicli di commutazione x 10
3
NL Aantal schakelingen x 10 3
Example
} Inductive load: 2 A
} Utilisation category: AC15
} Contact service life: 400 000 cycles
Provided the application requires fewer than 400 000 cycles, the PFH value (see technical
details) can be used in the calculation.
To increase the service life, sufficient spark suppression must be provided on all output
contacts. With capacitive loads, any power surges that occur must be noted. With contact­
ors, use freewheel diodes for spark suppression.