Hello. I have been searching the net trying to find a solution and this site has given me the most info out of all of the rest. I am now at a point where I need a tad bit more info, but I cannot seem to find it for my application or design. I am sure if I knew more about things I could adapt a higher voltage circuit, but I am not that knowledgeable.
Without going into too much unneeded detail, I would like to be able to convert 24vdc(or even 12vdc) to somewhere between 6-12vac. The reason is that I have a device I am building that measures water level of a tank. It needs to generate a 4-20mA analog signal, but also has to use AC power for the contact probes so that electrolysis does not happen. If I knew of a way to keep that from happening with DC power then I would just use it.
I have an idea of how to make it happen using 5 wires, 2 for AC power, and 3 for DC power/signal, but if I could convert the DC power in the relay box then I would just have to run 3 wires from the control cabinet where the analog signal is connected to the PLC.
This is the circuit I am referencing.
Except instead of the LED's, I am going to use a photomos relay. (This is my theory anyways) I am not concerned with the 4-20mA signal part as I have already built and have it functioning correctly. I just need to be able to energize/de-energize the relays based on water conductivity, and using AC seems to be about it unless I want to constantly clean/maintain probes using DC power.
Thanks for the help in advance, I hope I got enough detail in there for you guys.
Without going into too much unneeded detail, I would like to be able to convert 24vdc(or even 12vdc) to somewhere between 6-12vac. The reason is that I have a device I am building that measures water level of a tank. It needs to generate a 4-20mA analog signal, but also has to use AC power for the contact probes so that electrolysis does not happen. If I knew of a way to keep that from happening with DC power then I would just use it.
I have an idea of how to make it happen using 5 wires, 2 for AC power, and 3 for DC power/signal, but if I could convert the DC power in the relay box then I would just have to run 3 wires from the control cabinet where the analog signal is connected to the PLC.
This is the circuit I am referencing.
Except instead of the LED's, I am going to use a photomos relay. (This is my theory anyways) I am not concerned with the 4-20mA signal part as I have already built and have it functioning correctly. I just need to be able to energize/de-energize the relays based on water conductivity, and using AC seems to be about it unless I want to constantly clean/maintain probes using DC power.
Thanks for the help in advance, I hope I got enough detail in there for you guys.