The MGB safety system with guard locking and guard lock monitoring protects safety doors on machines and installations. In the EtherNet/IP version, users define which element is to be integrated and the related function. The system supplies the protocol frame with the necessary CIP safety input and output bytes required. Whether interlocking, guard locking, escape release or other functions such as buttons for start/stop, emergency stop or selector switch, the system meets all requirements for safety-related applications and can be equipped on a customer-specific basis. Comprehensive diagnostic information in the form of EtherNet/IP messages provides a detailed overview of the device status.