MXB12RU3ET is a Millenium series programmable logic controller designed for industrial automation and control applications. It features a 110-240V AC power supply with 8 digital inputs and 4 relay outputs rated at 8A, supporting up to 12 expansion modules for extended functionality. The unit includes embedded Ethernet connectivity with Modbus TCP/IP support, webserver capabilities, and optional RS485 interface for Modbus RTU communication. Operating across a wide temperature range of -20°C to +55°C, it supports multiple programming methods including Ladder, Function Block Diagram (FBD), and Sequential Function Chart (SFC) via CrouzetSoft software. This blind version (without display) features LED indicators for Power/Run status and is ideal for distributed control systems, machine automation, and networked industrial applications requiring compact, reliable PLC functionality.