Safety Function And Safe State - Pepperl+Fuchs KCD2-SR-1.LB Safety Manual

Safety Manual SIL KCD2-SR-(Ex)*(.LB)(.SP), HiC282*
Planning
2.3

Safety Function and Safe State

The safe state of each channel is "output de-energized", independent of the
mode of operation.
The safety function has two modes of operation:


The one channel devices have two outputs where output II may be used in safety
relevant applications if it is configured to follow output I.
Therefore the DIP switch settings for all channels used in safety relevant
applications are:
DIP Switch Settings 1-channel Devices
Function
Output I normal mode
Assignment output II
Line fault detection
1
This mode may not be used if output II is used for safety relevant applications.
2
This switch setting may not be used if the device is used for safety relevant applications.
Table 2.1
DIP Switch Settings 2-channel Devices
Function
Mode channel 1
Mode channel 2
Line fault detection
channel 1
Line fault detection
channel 2
1
This switch setting may not be used if the channel is used for safety relevant applications.
Table 2.2
LB/SC Diagnosis
The input loop of all versions is supervised, if the line fault detection is active
(mandatory, see data sheet). The related output goes to the safe state in case of
line fault.
8
normal operation (output follows input)
inverted operation (output inverts input)
Mode
normal mode
inverted mode
follow output I
1
LB/SC detection
ON
2
OFF
Mode
normal mode
inverted mode
normal mode
inverted mode
ON
1
OFF
ON
1
OFF
KCD2-SR-(Ex)1.LB(.SP)
S1 position I
S1 position II
S2 position I
S2 position II
S3 position I
S3 position II
KCD2-SR-(Ex)2(.SP)
S1 position I
S1 position II
S2 position I
S2 position II
S3 position I
S3 position II
S4 position I
S4 position II
HiC2821
S1 position II
S1 position I
S3 position I
S3 position II
S2 position I
S2 position II
HiC2822
S1 position II
S1 position I
S3 position II
S3 position I
S2 position I
S2 position II
S4 position I
S4 position II