Safety Function And Safe State - Pepperl+Fuchs HiD2872 Manual

Functional Safety HiD2872, HiC2873(Y1), HiD2876, HiC2877
Planning
3.3

Safety Function and Safe State

Safe State
The safe state of the output is the de-energized state. The output current is less than 0.4 mA.
Safety Function
The output is de-energized if the input is in low state. The low state is reached when the input
voltage is 5 V or below or the contact is open.
DIP switch settings
The device is configured by DIP switches.
The filter (switch S6) and the line fault detection (switch S5) are not safety relevant. However,
use of the line fault detection feature is recommended for safety applications. Consider the
consequences if the device remains in the safe state.
Reaction Time
The combined fault detection and fault reaction time is the time in which the device reacts
to an occurred fault.
The reaction time (switch off delay) for the safety function is < 100 ms.
Note!
See corresponding datasheets for further information.
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