Randy Posted January 31, 2018 Report Share Posted January 31, 2018 Good Morning All, I'm having a little difficulty with magnetic pickups. I have a V700 With the expansion adapter and two modules - the IO AI8 and a DI8 R04. I have an external 2-wire magnetic pickup that generates a sine wave Frequency with an amplitude of 1V+/- Based on the flow through a pipe with a turbine in it. In the wiring diagram, each counter/frequency shows a minimum of three wires at the pickup. Looking for guidance for how to wire this module in with the two wire pickup as described above... Any help is appreciated Quote Link to comment Share on other sites More sharing options...
MVP 2023 Joe Tauser Posted January 31, 2018 MVP 2023 Report Share Posted January 31, 2018 You can not connect that sensor directly to a digital input. You need a converter. Something like this: http://www.kep.com/productPages/flow-instruments/AMP-1.html Shameless self-promotion - if you're in the US, I have them in stock and can sell you one. Joe T. Quote Link to comment Share on other sites More sharing options...
Randy Posted January 31, 2018 Author Report Share Posted January 31, 2018 is it an amplifier, or does it convert to current or voltage? Quote Link to comment Share on other sites More sharing options...
MVP 2023 Joe Tauser Posted January 31, 2018 MVP 2023 Report Share Posted January 31, 2018 It looks for the zero crossing point of the sine wave to trigger another circuit that creates a square wave at the voltage the PLC is looking for. Google "zero crossing detector". Joe T. Quote Link to comment Share on other sites More sharing options...
Randy Posted January 31, 2018 Author Report Share Posted January 31, 2018 do you have a price on that unit? Quote Link to comment Share on other sites More sharing options...
MVP 2023 Joe Tauser Posted January 31, 2018 MVP 2023 Report Share Posted January 31, 2018 Sent you a private message. Joe T. Quote Link to comment Share on other sites More sharing options...
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