Page 6 of 68 King Pigeon Hi-Tech. Co., Ltd. Ver 1.0GSM/SMS/GPRS/3G/4GCellular IoT Modbus RTU4. 2 SpecificationsItem Reference ScopeDC Power supply Standard adapter: DC 12V/2A Range 9-36VDCPower consumption Standby:12V/50mA; Working Max.: 12V/150mAGSM Frequency 850/900/1800/1900Mhz3G/4G Optional: WCDMA/TDD-LTE/FDD-LTETCP/IP stack TCP,UDPSIM interface Supporting 3V and 1.8V SIM CardExternal antenna SMA Antenna interface, 50 Ohm, Gain: 3dBSerial Interfaces 1 USB PortProtocols SMS, GPRS UDP,TCP, Modbus RTU over TCP and King Pigeon RTUprotocol.RS485 1 RS485, Support Transparent transmission and Modbus RTU Slave,Modbus RTU Master.Digital Inputs 8 Digital input, NC/NO type, one of it can be used as Pulse Counters;Analog Inputs 6 Analog Inputs. 12 bit resolution, 0-5V or 0-20mA or 4-20mA;Temp.&Hum Inputs Temperature range: -40°C to +80°C, Humidity Range: 0~100%RH;Relay Outputs 4, Rated: 5A/30VDC,5A/250VACPower Outputs 2 Port, for external device;Extend I/O Tags Max.320Memory Capacity Internal 8G SD card inside, can save the data for 100000events.Backup Battery 3.7V 900mAHTemperature range -20-+70 °CHumidity range Relative humidity 95% (condensation free)Exterior dimension 195mm*88mm*30mmNet Weight 350g5. Physical Layout and Installation Diagram5.1 Control Unit size and physical layout