Hi, 

Please advise whether we need to connect TP1500 Earth terminal to Instrument Earth Bar(Clean Earth) in Enclosure or to Protective Earth (Dirty Earth) in Enclosure.

Also please advise is it necessary to isolate TP1500 from the Enclosure body.

Appreciate your expert advise.

p.s: 24V DC common is not grounded in 24V DC Power supply. 

AutoGen_1013878

Hi, 

Please advise whether we need to connect TP1500 Earth terminal to Instrument Earth Bar(Clean Earth) in Enclosure or to Protective Earth (Dirty Earth) in Enclosure.

Also please advise is it necessary to isolate TP1500 from the Enclosure body.

Appreciate your expert advise.

p.s: 24V DC common is not grounded in 24V DC Power supply. 

 Hello,

like this?

https://support.industry.siemens.com/cs/de/en/view/31032678/40328282379

Thank you for your feedback. I did notice this on the Comfort panel manual. However my query is mainly related to the earthing connection shown in the manual. On HMI you can notice a clean earth symbol and other end it is connected to Protective earth-PE, which is a dirty earth.

Appreciate if you can clarify further.