In addition to positive logic and over-current protection on all outputs, 48-channel IA-3125-U2i features isolated USB port that isolates board from host PC to better handle EMI/RFI noise. Other features include operating pulse outputs, built-in sequencer for handling short time pulses, and system expansion capable of handling several controllers while using one USB PC port. Outputs are capable of handling 0.7 A each, and current protected output enables operation of several outputs per load.