Hi Guys, I am developing a test for a DCP126 Impedance relay. These devices read input's from a 10KA circuit breaker, which has various outputs two being a 0-20mA which gives the state of the Breaker. What i want to do is simulate "faults" and be alble to vary the 100mA and 100mV inputs to the impedance relay. I have googled this and found some signal coverters that will do this for me, just wanted to do something a bit cheaper, as am looking to build a significant number of these.