Powerful data logger for tasks in energy controlling. Meter data, temperatures etc. can be recorded via the intergrated I/Os, the M-Bus and RS485 (stty3) system interfaces, and switching and actuating signals can be generated. An integrated data base supplies the data for higher-level energy management systems via LAN. Also, a connection via WLAN or UMTS adapter is possible. An integrated web server allows the configuration and parameterization via a web browser.C/C++, JAVA and Linux shell programmed applications are directly executable. The number of I/Os can be increased by connecting additional expansion modules.Suitable for decentralized mounting in serial sub-distributor.