Siemens ULTRAMAT 6F Manuel de sécurité - Page 15
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Siemens AG
3.6
Safety characteristics
The safety characteristics necessary for use of the system are listed in the SIL
declaration of conformity (see chapter Appendix). These values apply under
the following conditions:
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See also
Settings (Chapter 3-3)
SIL Declaration of Conformity (Chapter A.1)
The ULTRAMAT 6 is only used in safety-related systems with a low
demand mode for the safety function.
The safety-related parameters/settings (see "Settings" section) have
been entered by local operation and checked before commencing
safety-instrumented operation.
The ULTRAMAT 6 is blocked against unwanted and unauthorized
changes/ operation.
The average temperature viewed over a long period is 40°C.
All used materials are compatible with process conditions.
The MTTR after a device fault is 8 hours.
The best time to react on a dangerous detected failure is 1 hour.
The logic solver (PLC) has to be configured to detect over range
(>21mA) and under range (<3.6mA) failure of the ULTRAMAT 6 (Fail
High and Fail Low) and will recognize these as internal failure of the
devices and not cause a spurious trip.
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SIL Safety Manual ULTRAMAT 6 Gas analyzers
A5E00729183-02