QJ71EIP71 is a communication module offered by Mitsubishi Electric for their programmable logic controllers (PLCs). It is an Ethernet/IP module that provides communication capabilities over an Ethernet network. The module allows the PLC to communicate with other devices that also support the Ethernet/IP protocol, such as HMI (Human-Machine Interface) systems, SCADA (Supervisory Control and Data Acquisition) systems, and other controllers. It enables data exchange, remote monitoring, and control between different industrial automation components in a networked environment.