PCI Express card with 32-channel Optically-isolated Digital Input and 32-channel optoisolated Open-collector Digital Output (Sink/Source). The PEX-P32C32/P32A32 series provides 32 optically-isolated Digital Input channels and 32 optically-isolated Digital Output channels, arranged into four isolated banks. Each input channel uses a photocoupler input that allows either an internal isolated power supply or an external power supply to be connected,..