Model:S278 Name: Cellular IoT Modbus Gateway The Cellular IoT Modbus Gateway is an industrial class, high reliability, high stability, and programmable Remote Terminal Unit (RTU). It embedded 32-Bit High Performance Microprocessor MCU, integrated 1 Industrial 10/100M adaptive Ethernet module inside and inbuilt industrial Cellular module. It provides 4 digital inputs, 2 relay outputs, 1 ambient sensor input for monitoring onsite temperature and humidity, and RS485 serial port, performs as Modbus RTU Master Supports extend maximum 320 mapping registers. It can monitoring and operates the I/O ports by SMS, APP, Web Server, internet, timers and programmed inter-lock events automatically. The Cellular IoT Modbus Gateway supports transparent data transmission and performs as Modbus Slave over GPRS/3G/4G/NB-IoT network and RS485 serial port. Moreover, the Cellular IoT Modbus RTU can be used as Modbus RTU Master to reading smart meters, I/O modules, PLC, and converts to SMS alert once triggered the threshold value, or transmit data to remote server over GPRS/3G/4G/NB-IOT network. Main Features� 1. Can be operated from anywhere, no distance limitation; 2. Quad band 850/900/1800/1900Mhz GSM GPRS Module inside. 3. 3G/4G/NB-IoT Modules are optional; 4. Modular design, can easily upgrade the cellular module if network upgrade; 5. Embedded ARM® Cortex�-M4 32 Bit RISC Core, 168 MHz inside, RTOS system, reliable performance with in-built watchdog; 6. Wide range power supply 9~36VDC with over voltage and phase-reversal protection; 7. 4 digital inputs, compatibles dry and wet contact, one of it can be used as pulse counter; 8. 2 relay output (5A/30VDC, 5A/250VAC), compatibles pulse outputs; 9. 1 ambient sensor input for monitoring onsite temperature and humidity; 10. Inbuilt inter-lock logic programmer and powerful timer program function; 11. Resend the data while communication failure and alert to users by SMS; 12. Inbuilt TCP/IP protocol stack, supports cloud, APP and web server applications. 13. Supports Modbus TCP protocol, can integrate to SCADA,HMI,DSC directly. 14. Integrated 1 Industrial 10/100M adaptive Ethernet module inside, supports Modbus TCP; 15. 1 RS485 port supports Modbus RTU Master, supports max. 320 mapping registers, can be used to extend I/O ports or meters; 16. Supports SMS Alert when I/O triggered or recovery, and external power lost or recovery; 17. Provides 1 channel 9~36VDC power source output for external device, saving wiring cost; 18. Up to 10 SMS Alert and dial numbers, can program to receive specified alarm message. 19. Inbuilt 4M internal memory to save historical data and events; 20. Inbuilt large capacity automatically rechargeable backup battery;