The Ethernet NIU (IC695NIU001) makes it possible to use PACSystems RX3i and Series 90-30 I/O modules remotely on an Ethernet network. Once set up by configuration, data exchange is completely automatic. System control can be provided by any GE Intelligent Platforms master device capable of exchanging Ethernet Global Data. The Ethernet NIU automatically provides the controller with status information in each exchange. The application program logic in the controller can monitor this status data, and issue appropriate commands to the Ethernet NIU. The PACSystems Ethernet NIU is compatible with the same types of modules, backplanes, and other equipment as a PACSystems RX3i CPU.