GE Fanuc has introduced an Ethernet network interface unit (ENIU) for its PACSystems RX3I controller, which allows this, and its Series 90-30 I/O to be operated remotely on an Ethernet network. Once set up, data exchange is completely automatic. This high speed expansion unit reduces down time by allowing hot swap of I/O and providing support for the advanced RX3i I/O modules. In addition, it provides flexible control with optional local logic for emergency shut down in the event that control is lost. And, it reduces additional cost by providing built-in serial ports for communicating to third party devices such as Modbus Master.