Hi all -

I have an S7-1200, using version 15.1, that I'd like to use to count pulses off of an electric motor tachometer.

The tachometer output on the motors is a 5v sourcing output and does not require a power input to output pulses. I have the 5v version of this board installed, but have not been successful getting the high speed counter to record pulses.

Is there a way to wire this such that it will work in this application?

Thanks!

Are you sure the thing output pulses?

Counter module requires 24V pulses. Use something like this.