Safety Manual SIL KCD2-SR-(Ex)*(.LB)(.SP), HiC282*
Safety Recommendation
2014-09
11
Our experience has shown that the useful life time of a Pepperl+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
The useful life time is limited by the maximum number of switching cycles under
load conditions. The maximum number of switching cycles is depending on the
electrical load and may be higher when reduced currents and voltages are
applied. You can see the relationship between the maximum switching power and
the load conditions in the diagrams below.
Figure 3.1 Maximum switching power of HiC282*
Figure 3.2 Maximum switching power of KCD2-SR-(Ex)*(.LB)(.SP)
1
I (A)
10050
U (V)
30
0.5
0.3
Resistive load DC
Electrical life
max. 1 x 10
5
switching cycles
Electrical life
max. 2.5 x 10
5
switching cycles
1
I (A)
2
4
40
10030 50
200
115 253
U (V)
20
Electrical life
max. 1 x 10
5
switching cycles
0.5
0.4
0.15
Resistive load DC Resistive load AC
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