I'm facing a serious challenge of how to simulate some RTDs and thermocouples for an automatic (PLC-controlled) hardware simulation system that I am proposing. I'm not really looking for "outrageous" ideas like a servo motor turning a pot, etc. I would prefer to use off-the-shelf units, but a discrete component circuit would be OK, if necessary.
I tried googling for something, but only came up with human-adjustable simulators. I need something that can be controlled by a PLC. In defeat, I turn to you - please help!
BRW