Is there a way to use the 16 digital inputs of the the MSO style oscilloscopes? These seem to have a limitation of +/- 20 V. I see the over-voltage would cover the range I'm looking at, but there's no x10 "clips" to attenuate the signal. I see there might potentially be issues with the threshold range of +/- 5 V. I'm looking to analyze some inputs and outputs from a Programmable Logic Controller.
If there are some clips or accessories to make this work, what would they be? I could also potentially do some of this with a data logger, but those also have some voltage limitations. Being able to connect to the terminal board would be useful so that it can be left in place and returned to for later testing.
I'd like to be able to sample at a rate of 1 kS/s, there's a little flexibility, but higher would be preferred for future projects.