Toroidal core on plc output, why???

[FergNZ 0]

Why would a plc output have a toroidal / ferrite core on it?

It is a output to a safety relay, ‘dc enable for Cat0’ (I know drawing States solenoid but it goes to the safety relay)

there is no fault, I just want to know why. Please include reference material of possible. 

 

 

 

Edited 15 Mar 2022 by FergNZ

[FergNZ 0]

[panic mode 246]

without knowing details one can only speculate. in general, inductors are inserted in supply lines when there is a problem with transients. basically it works as a filter.