Safety Function And Safe State - Pepperl+Fuchs SIL KCD2-STC-1.HC Safety Manual

Safety Manual SIL KCD2-STC-(Ex)1.HC(.SP), HiC2025HC
Planning
2.3

Safety Function and Safe State

Safety Function
The safety function of the device is fulfilled, as long as the output repeats the input
current (4 mA ... 20 mA) with a tolerance of 2 %.
Therefore the DIP switch settings used in safety relevant applications are:
DIP Switch Settings KCD2-STC-(Ex)1.HC(.SP)
Function
Current source 4 mA ... 20 mA
Voltage source 1 V ... 5 V
Current sink 4 mA ... 20 mA
Table 2.1
DIP Switch Settings HiC2025HC
Function
Current source 4 mA ... 20 mA
Voltage source 1 V ... 5 V
Current sink 4 mA ... 20 mA
Table 2.2
Safe State
The safe state is defined as the output reaching values < 3.6 mA/0.9 V
or > 20.5 mA/5.125 V.
Reaction Time
The reaction time for all safety functions is < 20 ms.
8
S1 S2 S3
II II I
II II I
II I II
S1 S2 S3
OFF OFF ON
OFF OFF ON
OFF ON OFF
S4
II
I
II
S4
OFF
ON
OFF