Using phidgets 1057_2 Encoder HighSpeed, I wish to connect a rotary encoder, mounted on a testing machine, supplied with 24V, and whose outputs A & B are delivering 24V squared-waveforms. (datasheet: http://nicolas.charvin.free.fr/phidgets/HG650.pdf)
Phidgets 1057 works fine with the 3530 encoder, which is powered through USB and the Phidget board, and waveform A (or B) goes from 0.8V to 5.2V. Then, I can monitor rotation using supplied software.
Using a 24V benchtop power-supply and a simple resistor-based voltage divider (see: http://nicolas.charvin.free.fr/phidgets ... Forums.jpg), waveforms goes from 0V to 4V. But nothing is detected using supplied software.
(Note that with this setup, it works using a NI-6225 USB daq board).
I guess I miss something about ground connection, and I need some help.
Thanks in advance.