SIMATIC RTU3010C compact low-power RTU; battery or solar-operated; connection ext. power supply 10.8 V to 28.8 V DC; connection of external modems; connection to TeleControl Server Basic, loadable protocols: DNP3, IEC 60870-5-104, SINAUT ST7 or MQTT, onboard I/Os: 8 DI, 4 DO, 4 AI; FTP client; configuration/diagnostics via web server; time-of-day synchronization; email; SD card slot.