Leaderboard

You need something with a DC output compatible with what the PLC is looking for. These are the ones I use (full disclosure: and sell as a distributor)- http://www.dwyer-inst.com/Product/ProcessControl/CurrentTransformers-Switches/SeriesCCT60-70 Joe T.

Please post the make and model of the CT. A link to a data sheet would be even better. Joe T.

Agree with Gabriel. Also, it is possible that you have damaged something by not looking into all the parameters in the first place before connecting AC to something that is DC. This may account for the fluctuations you experience with the tester. You should be using the final CT product in your testing, not something that is different.....it's not much of a durability test if it isn't the product you're going to be using. Finally, ensure that you have all the wiring as recommended in the install literature. cheers, Aus

I suspect you´re using a CT with AC volts output. Analog input is only DC, 0 ... 10 Vdc range, then you need a converter from AC Volt to DC Volt.

A step by step guide to installing a project via SD Card on enhanced series controllers. SD Card App Install Procedure.pdf