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How to connect sensor to PLC


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  • 4 weeks later...
  • MVP 2023

Here are Andrew's schematics-

On to the question.  The TetraCon 325 is the actual conductivity sensor, which must be connected to a conditioner/amplifer.  You have mentioned a WTW LF96 for this.  Clicking the English flag for the link you posted reports that particular item is not available, so we'll move on. 

Page 4 of your schematic shows the analog inputs, which you currently have as two wire loop powered sensors.  If whatever conductivity amplifier you choose has an analog output, it is most likely powered by the amplifier.  So you connect the + of the analog output to AN4 and the - to COM on the module.

Joe T.

 

electro schematics.1.pdf

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