Separate or join signal and power grounding?

[antonischer]

Dear All,

Usually I just care w/ plc programming don't care about wiring but now I have to be responsible for the wiring. I doubt about how to manage grounding for instrument signals grounding and electrical device grounding (such as VSD

I read some website and find 2 different opinion: first, instrument and electrical grounding must be separated. Second, you must join both grounding. Both opinions' reason is make sense and I still confused which one is correct.

Does anybody here have experience to share with me, or have proper literature to download. I'd be very grateful.


Regards,

Anton

 

[rta53]

My practice is to have one point of grounding. Less risk of creating ground loops.

 

[antonischer]

Dear Rta,

Thanks, the job will be easier for me