I have an installation for an industrial facility in which I am having some issues. This question is technically a cabling question, but I figured it could easily fall in this realm of expertise.
This is essentially a two part problem.
I have purchased an industrial brick pc with an on-board video card. When connected to a custom touchscreen, I found that the monitor would not sync up with the pc. After a bit of runaround, I found out that the the VGA connection at the monitor is expecting a voltage range of 3.3VDC to 5.1VDC at the HSYNC/VSYNC pins (this is higher than most desktop monitors I believe). My industrial pc chipset only supplies 2.5VDC at those pins (this seems to be lower than my laptop and home pc as tested).
Replacing the video card is not an option given the prefab casing on the pc. I have considered purchasing another industrial pc from another manufacturer with an adequate output voltage to sync up to the monitor. I am hoping to find a solution to solve this problem in conjunction with Problem 2 (read on).
The touchscreen monitor will be separated from the PC by approximately 20-25 meters of cabling (1 VGA and 1 USB). I would use a simple KVM extender, except that most of the products I have seen require power on the receiver end (5-12 VDC). This is a problem because the touchscreen monitor is located in a hazardous rated area (read: explosive gas, so it needs an industrial hazard rating - if not rating, the device cannot be powered in the hazardous area).
To solve both of these, I would need some sort of good cable extender, VGA and USB, which is self powered, and has the possibility of amplifying the VGA voltage signals. I am open to a multiple part solution as I doubt there is something clean out of the box to solve this problem.
Thanks in advance.