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We've successfully interfaced RTDs to PLCs and I think thermocouples. Has anyone had any luck getting cheap thermistors to work with standard (preferably AB) PLCs? I believe AB has a unit that should work in this application, but I don't think it will register a wide enough resistance range - my guess is that you should need to be able to accurately measure at least 300K Ohms.
I'm told that there are crappy proprietary controllers and hardware for this purpose whose companies frequently get bought out.
Can anyone verify the above and point me in the right direction for what I should be looking for - A cheap "easily interfacable" standalone device or a way to read thermistors with standard PLC I/O cards. TIA,
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Nathan Boeger
Inductive Automation
"Design Simplicity Cures Engineered Complexity"
I'm told that there are crappy proprietary controllers and hardware for this purpose whose companies frequently get bought out.
Can anyone verify the above and point me in the right direction for what I should be looking for - A cheap "easily interfacable" standalone device or a way to read thermistors with standard PLC I/O cards. TIA,
----
Nathan Boeger
Inductive Automation
"Design Simplicity Cures Engineered Complexity"