I am sharing an appliance which contains LEDs that either of two PCI DIO 96 cards can sink the LED to turn it on - a 'wired-or' condition. This works great as long as both of the PCI DIO cards stay active.
When one system containing the DIO card is powered off, the LED at the appliance illuminates overriding the chance of the other system using it.
is there a way to command (or strap) the PCI DIO 96 card to go to a 'high impedance' or HIGH state when powered off?