The PCCG340 Concentrator (DCU) manages sensor readings using Communication and includes mass memory which holds up to three months of all sensor readings, acting as a smart gateway between the sensors and the data management software (MDM). The Concentrator support multi communication protocols and multiple communication methods (Serial Interface, USB, LAN-TCP/IP, PLC, GPRS and IR). The Concentrator firmware supports remote upgrade and performs manual and automatic tasks, predefined in the central software.