The OP4610-IO is an I/O expansion unit within the OP4xxx family that uses the Xilinx Kintex™-7 FPGA to provide additional inputs and outputs for existing OPAL-RT simulators and expansion units. It can provide up to 128 additional I/Os and offers high speed SFP communication or PCI-Express links that can be used to communicate with OPAL-RT simulators in a variety of configurations.