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

Functional Safety KCD2-STC-(Ex)1(.SP)(-Y1), HiC2025(Y1)
Planning
3.3

Safety Function and Safe State

Safety Function
The device transfers analog signals from the input to the output with a tolerance of 2 % related
to the full signal range.
Use the following DIP switch settings for safety-relevant applications:
DIP Switch Settings KCD2-STC-(Ex)1(.SP)(-Y1)
Function
Current source 4 mA to 20 mA
Voltage source 1 V to 5 V
Current sink 4 mA to 20 mA
Table 3.1
DIP Switch Settings HiC2025(Y1)
Function
Current source 4 mA to 20 mA
Voltage source 1 V to 5 V
Current sink 4 mA to 20 mA
Table 3.2
Safe State
In the safe state, the following values must be reached at the output:
• < 3.6 mA or > 21.5 mA,
• < 0.9 V or > 5.375 V,
Reaction Time
The reaction time for all safety functions is < 20 ms.
Note!
See corresponding datasheets for further information.
12
S1 S2
II II
II II
II I
S1 S2
OFF OFF
OFF OFF
OFF ON
S3 S4
I II
I I
II II
S3 S4
ON OFF
ON ON
OFF OFF