10
Hans Turck GmbH & Co. KG | T +49 208 4952-0 | F +49 208 4952-264 | [email protected] | www.turck.com
Operating Instructions
5.3
Examples of using this results
5.3.1
Probability of dangerous failure per hour (High Demand Mode)
The PFH values are based on a worst-case diagnostic test rate and a reaction time of 20 ms. The
ratio of the diagnostic test rate to the demand rate shall equal or exceed 100.
PFH
IMX18-DI03-4S-4T1R
7.92E-08 1/h
IM18-DI03-4S-4T1R
7.92E-08 1/h
5.3.2
Average probability of dangerous failure on demand (Low Demand Mode)
With the FMEDA results and the values specified in the following table the average frequency of
dangerous failure can be calculated exemplarily:
T1
8760 h
MTTR
24 h
MTR
24 h
PFDavg
IMX18-DI03-4S-4T1R
3.49E-04
IM18-DI03-4S-4T1R
3.49E-04
6
Operating Instructions
6.1
General
➤
The device must be registered online:
http://www.turck.com/SIL
or with the supplied SIL
registration card. This must be filled in with all required information upon receipt and sent to
Turck.
➤
The device must only be carried out, fitted, installed, operated, commissioned and main-
tained by trained and qualified personnel.
➤
The device is not specified for a certain application. Make sure that application-specific as-
pects are considered.
➤
Data from other documents, e.g. data sheets, is not valid for functional safety operation. De-
vices must be used in cabinets in an typical industrial field environment only. The following
restrictions describe the operation and storage conditions:
➤
Ensure that the environment complies with the following ratings
Minimum ambient temperature
-25 °C
Maximum ambient temperature
70 °C
Minimum storage temperature
-40 °C
Maximum storage temperature
80 °C
Maximum air humidity
95 %
Minimum air pressure
80 kPa
Maximum air pressure
110 kPa
➤
The average temperature over a long period of time directly on the exterior sidewall of the
housing must be maximum 40 °C.
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