Protective circuit for outputs that switch inductive loads
WARNING
Increasing the fault reaction time
Can Cause Death, Serious Injury, or Property Damage.
Note that the (fault) reaction time is made longer by the protective circuit.
WARNING
Loss of the safety function
Can Cause Death, Serious Injury, or Property Damage.
In the case of inductive loads, the external protective circuit must be arranged in parallel with
the load. Connection in parallel with the outputs can prevent shutdown of the machine or
process.
The diagrams show examples of protective circuits
for inductive loads. You will nd details of protec‐
tive circuits from SIEMENS in the catalog and the
relevant documentation.
Example:
Protective circuit for an inductive load
Operation
6.2 Selection of sensors and actuators
SIRIUS 3RK3 Modular Safety System
Equipment Manual, 07/2020, NEB926253002000/RS-AC/006 191
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