Functional Safety KFD2-SR3-(Ex)2.2S
Planning
20
16-03
11
3.3
Safety Function and Safe State
Safe State
The safe state of output I and output II is the de-energized state.
Safety Function
The safety function has two modes of operation:
• normal operation (output follows input)
• inverted operation (output inverts input)
Observe that only one input and one output are part of the same safety function in
the 2-channel version.
DIP Switch Settings
Line Fault Detection
For use in a safety function enable the line fault detection.
The input loop of all versions is supervised. The related safety function is that the
outputs go to fault state (safe state) if a line fault is detected.
Reaction Time
The reaction time for the safety function is < 20 ms.
Function
Mode
KFD2-SR3-2.2S,
KFD2-SR3-Ex2.2S
Mode channel I
normal mode
S1 position I
inverted mode
S1 position II
Mode channel II
normal mode
S2 position I
inverted mode
S2 position II
Line fault detection
ON
S3 position I
OFF
1
1
This switch setting may not be used if the device is used for safety relevant applications.
S3 position II
Table 3.1
Note!
The collective error message output is not safety relevant.