2
02
2-
06
12
Functional Safety HiC2853R1, HiC2853R4
Planning
3.3
Safety Function and Safe State
Safe State
The safe state is reached when the input goes to the low current state (I < 2.1 mA)
or the fault state (I > 5.9 mA).
Safety Function
The safe state for the resistive transistor output (output I) is high impedant.
The safe state for the electronic output (output II) is de-energized. The safe state will also
be achieved if the device is not powered.
The output II safe state initiated by an input low condition will be reached within 20 ms
at 4.7 k
load impedance. This mode of operation cannot be changed.
This is part of the safety concept of the device.
Fault Reaction Time
The reaction time for all safety functions is < 20 ms.
Note
See corresponding datasheets for further information.
