Thanks for the idea Mike.
I was able to get more information from the signal conditioner manufacturer on their configuration, they said it could be possible to shift the 0V on all three channels by turning the Zero pot until a -5V value is found. The high end of the scale will follow and...
I was assigned to a project to alter one of our existing data acquisition systems due to a vendor supply issue with the DAQ Board.
Here is what we need to do: change our current DAQ Board that reads 3 analog signals on a 0-10V Unipolar scale to a DAQ Board that uses a Bipolar -5V to +5V scale...
That would be a good solution, unfortunately I was asked to find something specifically related to the power entry. This situation could apply to some of our other machine lines as well, one of them relies heavily on analog signals and also requires a solid ground reference.
Yes, this really relates to the HMI powered by 24VDC supply. It communicates via RS-232 to a PLC. In addition to the 24/0VDC power input terminals it has a ground terminal, if this side is not wired to the machine we get abnormal communication results.
I'm looking for a power input module or relay type device to break power supplied to our machine if no ground is detected. Would a GFIC wired inside the machine help in this situation?
We've recently been suppling machines to China and the Pacific Rim and have had issues with RS-232...
Looks like I was seriously misinformed!
The original concern came from our parent company, of course they failed to mention the supply was a custom linear design - developed by their EE. This design had the switching set to 190V, so in a "brown out" situation the PS would switch to the 120V...
We use a couple different 24VDC power supplies to drive components in testing instrumentation we manufacture. Recently we've been told that using a supply with "Automatic" voltage inputs (120V/230V) puts our equipment at risk when used on a 230V circuit and one leg drops, causing an "under...
