Analog input Card protector

Hi Gurus,

I am using few analog inputs ( 0-10vdc) for my PLC in a new project.

I am concerned about protecting these inputs from transmitting stray voltages,leakage, or any surges, which would damage the analog input cards.

Are there any isolators available which can be put between the field transmitters and the analog input card and would take the surge saving the analog input card.

If yes which make would you suggest..

Thanks

plcsoftvsd

We just use a dedicated power supply for the 10V analog, and properly grounded and shielded cabling. We've never had issues with our cards.

I agree with Tharon, properly wired, you shouldnt need the isolators. If you still want them tho, AD makes a great cheap isolator.

http://web2.automationdirect.com/adc/Shopping/Catalog/Process_Controls/Signal_Conditioners

matt

Pepperl and Fuchs or MTL make opto-isolators and galvanic barriers. Either will protect the loops fully.