SIMATIC RTU3030C – Compact low power RTU, battery-or recharge. Battery operated, ext. connection. Power supply 10.8 V up to 28.8 V DC, integrated UMTS-modem, connect. To Telecontrol server basic, DNP3 and IEC60870-5-104 protocols, onboard I/O: 8DI, 4DO, 4AI, local Ethernet-port, Configuration/diagnostics per web-interface, clock synchronization, sms/e-mail, internal memory 256 KB, SD-card slot, please note national approvals!