I have a problem, need some advice.. I have a circuit that consists of an E/P converter (voltage to pressure) and a signal isolator to generate a 0-10vdc analog signal used as an input to the E/P converter. The converter also requires that a 24vdc power source be applied. I have a 24vdc power supply to generate the needed voltage.
Herein lies the problem/question. The E/P converter only has one negative lead for a common negative between the two voltage sources, but my voltages do not share a common negative. If I use the 24V negative, I don't get my 0-10V input to track pressure and generate output... if I use the 0-10v negative, I get a tracking signal, but no 24V power to the E/P converter....
Can I tie the negatives together without affecting the signal isolator's output (0-10Vdc) or the power supplies output (24Vdc)?? Or am I going to create unwanted crossover??
Herein lies the problem/question. The E/P converter only has one negative lead for a common negative between the two voltage sources, but my voltages do not share a common negative. If I use the 24V negative, I don't get my 0-10V input to track pressure and generate output... if I use the 0-10v negative, I get a tracking signal, but no 24V power to the E/P converter....
Can I tie the negatives together without affecting the signal isolator's output (0-10Vdc) or the power supplies output (24Vdc)?? Or am I going to create unwanted crossover??