The Dual Simcard Cellular IoT Modbus RTU is design for working in the harsh industrial application environment, converting Modbus TCP/RTU to SMS and cloud platform. widely used in a variety of industrial automation, security monitoring system, automatically measurement and control system, BTS monitoring, remote data acquisition, telemetrically systems, automatically control system. It can be used as a remote switch, remote I/O, remote smart PLC, timer switches. Supports SMS, GPRS, 3G, 4G Lte Cellular Networks.Compatible Modbus TCP and MQTT IoT Protocols and can intergrate to the KPIIOT IoT Cloud Platform and OPC, SCADA and MES systems. 1. Can be operated from anywhere, no distance limitation;
3. 3G/4G/NB-IoT Modules are optional;
5. Embedded ARM® Cortex™-M4 32 Bit RISC Core, 168 MHz inside, RTOS system, reliable performance with in-built watchdog;
7. 8 digital inputs, compatibles dry and wet contact, one of it can be used as pulse counter;
9. 4 relay output (5A/30VDC, 5A/250VAC), compatibles pulse outputs;
11. Inbuilt inter-lock logic programmer and powerful timer program function;
13. Inbuilt TCP/IP protocol stack, supports cloud, APP and web server applications.
15. Supports RJ45 Ethernet port for connect internet, WAN or LAN;
17. Supports SMS Alert when I/O triggered or recovery, and external power lost or recovery;
19. Up to 10 SMS Alert and dial numbers, can program to receive specified alarm message.
21. Inbuilt 8G SD card to save up to 100000 historical data and events;
23. Industrial class design suitable for long time work applications;
24. using metal shell, protection class IP30. Metal shell and system security isolation, especially suitable for industrial applications in the field; 
