Table of Contents
Advertisement
Technical data
This chapter lists the specifications that are relevant for fail-safe operation.
For more information, please read Application and ambient conditions (Page 42).
Additional specifications can be found in the operating instructions for the HMI device.
9.1
Technical data for fail-safe operation
Fail-safe operation
The safety characteristics in the specifications apply for a proof-test interval of 10 years and
a mean repair time of 8 hours.
In accordance with IEC 61508
Hardware architecture
Hardware error tolerance
Safe failure fraction
Diagnostic test interval
Request rate
High demand (PFH: probability of a dangerous failure per
hour) at 40 °C
Maximum achievable safety class (SIL)
Useful life
In accordance with DIN EN ISO 13849-1
Mean time to failure (MTTF
Meantime to Restoration (MTTR)
Diagnostic coverage (DC)
Performance level (PL)
Safety category
In accordance with EN 954-1
Safety category
Fail-safe operation of the Mobile Panel 277F IWLAN
Function Manual, 08/2008, 6AV6691-1FQ01-2AB0
WARNING
)
d
Redundant 1oo2
1
99,5 %
10 ms
High demand mode
8.60E-11 1/h
3
10 years
1516 years
8 hours
99 %
e
4
4
9
109
Advertisement
Table of Contents
