The OP5705-IO is an I/O expansion unit to provide additional inputs and outputs for existing OPAL-RT simulators and expansion units. It is equipped with a Xilinx Artix®-7 200T FPGA for additional processing power. The expansion unit provides up to 256 I/Os, while offering 4 high-speed SFP communication or PCI-Express links for communicating with OPAL-RT simulators, like the OP5705XG and the OP5707XG, in any configurations.