The Beckhoff CX2100-0004 is a versatile power supply unit designed specifically for the CX2000 series of Embedded PCs. It provides a reliable 24 V DC input to power the main CPU module and the connected I/O terminals. In addition to its primary power supply function, this module integrates a direct I/O interface, allowing for the seamless connection of either Beckhoff Bus Terminals (K-bus) or EtherCAT Terminals (E-bus). A key feature is the integrated 128 kB NOVRAM, which provides non-volatile memory for retaining critical process data in the event of a power failure, enhancing system reliability and data integrity for demanding industrial automation applications.