Festo ZSB-1/8-B, Перевод оригинальной инструкции

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12 Festo — ZSB-1/8-B — 2022-08c
Technical data
General safety reference data
Safety level In accordance with EN ISO 13849
Maximum achievable category 1
Maximum achievable performance
level PL-c
Service life value B
10
1 million switching cycles
Probability of failure per hour (PFH
D
) [1/h]
£
200,000 actuations/year: 1.14 x 10-6
>
200,000 actuations/year è Fig. 4
Duration of use T
M
20 a
Well-tried component Yes
Fault exclusion
1)
–
Deformation due to overloading
–
Automatic change of the initial switching posi-
tion without inlet signal
–
Rupture of the valve housing
–
Breakage of moving component
Type of two-hand control Type III A according to EN ISO 13851
Design features
–
Overlap
–
Mechanical spring return
–
Poppet valve with spring return
1) Faults that do not need to be taken into consideration by the user when analysing possible faults of a safety-related part of a control
system.
Tab. 10: General safety reference data
PFH
D
value
The PFH
D
value of the subsystem can, for example, be calculated with SISTEMA using the following
values:
–
Service-life value B
10D
= 2 x B10 in accordance with EN ISO 13849-1, Table C.1, Note 1
–
Average annual number of actuations (n
op
)
SISTEMA: software wizard for “Evaluation of safety-related machine applications according to EN ISO
13849.