This product is a PCI Express bus-compliant interface card used to provide a digital signal I/O function on a PC. The product can input and output digital signals at high voltages (24 - 48VDC). DIO-1616H-PE features 16 opto-coupler isolated inputs and 16 opto-coupler isolated open-collector outputs. You can use 16 input signals as interrupt inputs. Equipped with the digital filter function to prevent wrong recognition of input signals is provided and output transistor protection circuit (surge voltage protection and over current protection). Windows/Linux driver is bundled with this product.