apearson
Member
Hi folks,
I'm doing a valve positioning system (new plc replacing old discrete instrumentation), the old system has position feedback from valves in the form of a 3 wire potentiometer.
So, if I only use 2 of the wires so I now have a rheostat rather than a potential divider, could I input these into a 5069-IY4 set in 2 wire RTD mode?
I'm thinking set in Ohms rather than PT100 etc and scale 1-500ohm is 0-333 degrees, with the 135ohm pots I have, this should then equate to 0-90degrees valve position.
Any thoughts? I can't see a reason why it wouldn't work. I know there are some IR4 modules for the Micro's that can handle it so I'm assuming these can.
Thanks in Advance
Ash
I'm doing a valve positioning system (new plc replacing old discrete instrumentation), the old system has position feedback from valves in the form of a 3 wire potentiometer.
So, if I only use 2 of the wires so I now have a rheostat rather than a potential divider, could I input these into a 5069-IY4 set in 2 wire RTD mode?
I'm thinking set in Ohms rather than PT100 etc and scale 1-500ohm is 0-333 degrees, with the 135ohm pots I have, this should then equate to 0-90degrees valve position.
Any thoughts? I can't see a reason why it wouldn't work. I know there are some IR4 modules for the Micro's that can handle it so I'm assuming these can.
Thanks in Advance
Ash