SAFETY MANUAL SIL KFD0-RSH-1.4S.PS2
Safety Recommendation
22
5538
201
1-
04
11
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. The effective life time can be higher.
Maximum Switching Power of Output Contacts
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
3.4
Installation and Commissioning
Installation has to consider all aspects regarding the SIL level of the loop. During
installation or replacement of the device the loop has to shut down. Devices have
to be replaced by the same type of devices.
1
0
I (A)
2
5
30
100
50
20
10
200
115
253
220
U (V)
Resistive load
AC
Resistive load
DC
0.5
0.2
0.1
0.3
0.6
max. 10
5
switching cycles
max. 3 x 10
4
switching cycles
