VOFA-L26-T32C-M-G14-1C1-...
Festo – VOFA-L26-T32C-M-G14-1C1-... – 1409NH English
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Technical data
Safety engineering
Conforms to standard
EN ISO 13849
Characteristics
–
max. achievable category
–
max. achievable Performance Level
–
service life characteristic B
10
–
diagnostic coverage (DC)
–
probability of an endangering failure
per hour (PFH
d
)
–
duration of use T
M
–
proven component
4
PL e
10 million switching cycles
99 % if the logic operation of the control signal and the
signal change of the proximity sensor (expectation) is
checked with each actuation of both solenoid valves
Tab. 6 and Fig. 11
20 a
Yes
Fault exclusion
1)
–
punching of the seal
–
cracking of the valve housing
Design characteristics
–
no overlap
–
pilot actuated piston spool
CE marking (
declaration of conformity) According to EC Machinery Directive 2006/42/EC
Tab. 5
Safety engineering
The control block is a two-channel subsystem. The characteristic values for safety engineering
(
Tab. 5) apply for each channel. The PFH
d
value of the subsystem (
Tab. 6 and Fig. 11) can be cal-
culated, for example, with SISTEMA
2)
using the following values:
–
service life characteristic B10
d
= 2 x B10 (according to EN ISO 13849-1, table C.1, note 1)
–
average number of actuations per year (n
op
)
–
diagnostic coverage (DC) per channel of 99 %
–
CCF with a value of 65 points.
1)
Errors which do not need to be taken into consideration by the user when analysing possible errors of a safety-related part of a
control system
.
2)
Software Assistant for “Evaluation of safety-related machine applications according to DIN EN ISO 13849”
www.dguv.de
