The advantech usb 4750 is a 32 channel isolated digital io module from the manufacturers usb 4700 series of true plug play data acquisition modules the usb 4750 module makes any computer with a usb port capable of measurement and control each io corresponds to a bit in an io port making the usb 4750 very easy to program offering full plug play functionality via the locking usb cable the module is also powered via the usb cable the usb 4750 offers a counter or timer and one digital