Divinitous:
[quote author=James C4S link=topic=156963.msg1176036#msg1176036 date=1364488651]
What is the source of "Vin"?
Basically the connects to the machine with a 4 pin connector. All voltages are DC. 24v for the stand to operate on, 1 pin for the upper optic voltage, 1 pin for the lower optic voltage (both a max of 12v) and a ground. The stand itself operates on 24v from a power supply that is also powering other components. The supply isn't the issue as it was well oversized, it's the circuitry inside the stand and the voltage divider.
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If those voltage divider resistors are really the ohms you have stated then the two optic voltage outputs have just too high a source impedance to read like that. You would have to buffer them first with a high input impedance op-amp or some other means to not 'load down' the signal voltage from those two signals.
Lefty