Controller Probes, How do they work?

[BornHandy]

I wondered if anyone knows exactly how controller probes work?

Specifically, what is being read by the controller. 0 to 24 volts? Ohms? something else?

I might want to try to make some work on a PLC if anyone knows what the signal I would be looking for was.

Thanks.

 

[Larry L]

I think most probes produce 0 to 10 V output.

 

[theatrus]

I wondered if anyone knows exactly how controller probes work?

Specifically, what is being read by the controller. 0 to 24 volts? Ohms? something else?

I might want to try to make some work on a PLC if anyone knows what the signal I would be looking for was.

Thanks.

What type of probe? And raw probe or something else?

 

[Ranjib]

I wondered if anyone knows exactly how controller probes work?

Specifically, what is being read by the controller. 0 to 24 volts? Ohms? something else?

I might want to try to make some work on a PLC if anyone knows what the signal I would be looking for was.

Thanks.

pH probes provide millivolts reading which is then converted to 0-14 scale using calibration. Some of the temperature probes uses resistance (ohms) ...

 

[BornHandy]

Thanks!

 

[siggy]

I might want to try to make some work on a PLC

what do you have to use? I used ab1771 and you set jumpers on the board for what you need then scale in the software. Some of the smaller/newer is straight software scaling.