Technical data
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SLS 78/R
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35/7-2
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Review-Stand, , 17. March 2016
DEUTSCH
ENGLIS
H
FRAN
ÇAIS
ITALIANO
ESPAÑOL
NEDERLANDS
10
Technical data
10.1
Safety-relevant technical data
Type in accordance with IEC/EN 61496
Type 4
Performance Level (PL) in accordance with
ISO 13849-1: 2008
PL e
Category in accordance with ISO 13849-1
Cat. 4
Mean probability of a dangerous failure per hour
(PFHd) as a function of the mean number of annu-
al switching cycles of the relay n
op
*
n
op
= 4,800:
n
op
= 28,800:
n
op
= 86,400:
3.4 x 10
-8
1/h
4.9 x 10
-8
1/h
9.9 x 10
-8
1/h
Number of cycles until 10 % of the components
have a failure to danger (B
10d
)
400,000 switching cycles at rated load
20 million switching cycles at 20% of
rated load
Service life (T
M
)
20 years**
*n
op
= mean number of annual actuations, see C.4.2 and C.4.3 of ISO 13849-1: 2008
** The date of manufacture can be found on the name plate and is included in the serial number (YY/
WW):
2nd and 3rd digits: JJ year of construction
4th and 5th digits: WW calendar week
Use the following formula to calculate the mean number of annual actuations:
In doing so, make the following assumptions with regard to the use of the component:
h
op
= mean operating time in hours per day
d
op
= mean operating time in days per year
t
cycle
= mean time between the start of two successive cycles of the component (e.g
switching of a valve) in seconds per cycle
n
op
d
op
h
op
3600s/h
t
Zyklus
=
