Yep, I am going to be putting them as close as possible, but the filters themselves are 20' deep. So the leads that go to the bottom point will be 21'-22' long. I was going to originally put the box with the circuit board inside the filter house which sits in the middle of all four filters, but I think any length of wire I can save is better. I never thought that the length of wire would be this big of an issue.Frequency! Long parallel leads! Yes that happened to me too! I'm a little familiar with this type of water detectorhttp://www.picaxeforum.co.uk/showthread.php?12266-08M-Christmas-tree-watering-controller
I had cross coupling between the drive and the detector wires in the cable on mine. Had to turn down the frequency. But that was on a 4' cable. You might want to run the drive and detector wires as two separate shielded cables if you have to go very far.
But, are you running the drive and detect leads 45'. NO...no...no! Not a good idea with this type of AC drive. Put your circuit as near to the probes as possible. Run your final output back to your PLC. I must have missed a description of the layout of you plant.
Ken
I figured we were thinking two separate arrangements.Totally different arrangement than I had pictured. Will a film of water still connect the screw heads after the water level drops below them?
Ken
No, as the signal wire(s) will just be on or off.Do you foresee an issue with signal wires run with the 12vdc/0vdc wires? I'll do a test circuit to see, but I suspect there will be no issue since its done with other types of sensors.
by Aaron Carman
by Duane Benson
by Duane Benson