XI/ON modular I/O system includes XN series with hot-swappable plug-in modules, and  XNE series provides integrated I/O modules and bases in higher-density configurations. Base modules for the XN Series connect field wiring for standard XI/ON modules; they're available for two, three and four-wire connections, as block or slice modules, with spring-cage or screw terminals. XNE modules have push-in, spring-cage terminals only and are compatible with XN spring-cage base modules. Standard fieldbuses include EtherNet/IP, Modbus TCP, DeviceNet, Profibus-DP, and CANopen.
