Safety Function And Safe State - Pepperl+Fuchs KFD2-SR3-2.2S Manual

Functional Safety KFD2-SR3-(Ex)2.2S
Planning
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
Function
Mode channel I
Mode channel II
Line fault detection
Table 3.1
1
This switch setting may not be used if the device is used for safety relevant applications.
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.
Note!
The collective error message output is not safety relevant.
Mode
normal mode
inverted mode
normal mode
inverted mode
ON
1
OFF
KFD2-SR3-2.2S,
KFD2-SR3-Ex2.2S
S1 position I
S1 position II
S2 position I
S2 position II
S3 position I
S3 position II
11