sumPLC
Member
I am automating a COP tank. If you're not familiar with the term, it's basically a big dishwashing sink. I am using a level sensor to know when to stop filling the tank. The sensor is in a 120vac circuit. When the water gets to the level, it completes the circuit and triggers a relay that controls another 120vac circuit. I would like to use the second circuit as a digital input to the PLC. The best idea I've had is to use a transformer to transform the ac to dc. Is there a better, simpler, cheaper way to do this?