Datasheet

Relays for functional safety
Safety relays PNOZsigma
PNOZ s22
Pilz GmbH & Co. KG, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
Telephone: [phone], Telefax: [phone], E-Mail: [e-mail]
2016-09
808
Safety characteristic data
Operating
Mode
EN ISO
13849-1:
2015
PL
EN ISO
13849-1:
2015
Category
EN 62061
SIL CL
EN 62061
PFH
D
[1/h]
IEC 61511
SIL
IEC 61511
PFD
EN ISO
13849-1:
2015
T
M
[year]
Safety con-
tacts, in-
stantaneous PL e Cat. 4 SIL CL 3 2,31E-09 SIL 3 2,03E-06 20
Supplementary data
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)
Fig.: Service life graphs at 24 VDC and 230 VAC