Pepperl+Fuchs SIL KFD0-RSH-1, Руководство по безопасности

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Safety Manual SIL KFD0-RSH-1(-Y2), KFD2-SL-4
Safety Recommendation
2
014-07
13
Our experience has shown that the useful life time of a Fuchs product
can be higher

if there are no components with reduced life time in the safety path (like
electrolytic capacitors, relays, flash memory, opto coupler) which can
produce dangerous undetected failures and

if the ambient temperature is significantly below 60
°
C.
Please note that the useful life time refers to the (constant) failure rate of the
device.
Maximum Switching Power of Output Contacts (KFD0-RSH-1(-Y2) only)
The useful life time is limited by the maximum switching cycles under load
conditions. You can see the relationship between the maximum switching power
and the load conditions in the diagram below.
Figure 3.1
This is valid for 2 x 10
5
electrical switching cycles at maximum load. This number
can be higher depending on the load attached.
3.4 Installation and Commissioning
During installation all aspects regarding the SIL level of the loop must be
considered. The safety function must be tested to ensure the expected outputs
are given. When replacing a device, the loop must be shut down. In all cases,
devices must be replaced by the same type.
1
0
I (A)
2
5
35
100 50 20 10 200
115 250
U (V) 500
70
Resistive load
AC
Resistive load
DC
0.5
0.2
0.1
0.3
2.5
Recommended
maximum utilization
of the fuse
80 % from 2.5 A