Hi
I have bought PCI-8430 RS232. I have found that the shield of the PCI card is connected to the GND of the serial ports. In fact a simple continuity test with a multi meter between pin5 of DB9 and the case of the card shows this problem.
When I install the PCI card to the motherboard, the shield of my pc will connect to the GND of the serial devices and this will cause serious problem in my application.
how can I solve this problem?
regard