Industrial Universal PCI card with 16 isolated Digital Inputs and 16 Open-collector Digital Outputs (Sink, NPN). The PCI-P16C16U universal PCI card supports 3.3 V/5 V PCI bus. These cards contain 16 optically isolated Digital Input channels and 16 open collector (Sink, NPN) Digital Output channels. The DI channels provide 5000 Vrms isolation protection that allows the input signals to be completely floated so as to prevent ground loops and isolat..