BTW, does anyone have any experience with wiring up PIDs? I would like to modify the the following design pictured below (credit goes to Disintegr8or for the drawing) to control more than one heater. But I'm not sure if this is even possible without buying 3 separate PIDs.
I have drawn up a similar wiring diagram that I think may work but I don't have any electrical experience and I'm not really sure if I have done it correctly. If anyone could tell me whether or not I am on the right track I would really appreciate it!