Programmable GSM/GPRS/3G/4G Remote Terminal Unit S274 for IoT Applications

Model List

 Brief introduction

The Cellular IoT Modbus RTU is an industrial class, high reliability, high stability, and programmable Remote Terminal Unit (RTU).  It embedded 32-Bit High Performance Microprocessor MCU, inbuilt industrial Cellular module. It provides 8 digital inputs, 6 analog or PT100 Resistance Temperature Detector (RTD) inputs, 4 relay outputs, 1 ambient sensor input for monitoring onsite temperature and humidity, and RS485 serial port, supports 80/224/320 mapping registers via Modbus RTU protocol. 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 RTU inbuilt TCP/IP protocol stack make it suitable for internet of things (IoT) applications, it can be easily to operate by the provided cloud, app, and web server, or integrated to you IoT applications according to the TCP/UDP protocol, or integrated to SCADA systems by standard Modbus TCP protocol, too. This is very useful if you need remote control onsite devices with low cost solution.

The Cellular IoT Modbus RTU is design for working in the harsh industrial application environment, 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.

The Cellular IoT Modbus RTU can be used as remote access control for BTS monitoring, the authorized users can open the gate or turn on the machine with a free charge call at specified time, this is useful for daily maintenance to save the time of traditional authorized.

The Cellular IoT Modbus RTU supports transparent data transmission and performs as Modbus Slave over GPRS/3G/4G 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 network.

Typically applications:

BTS Monitoring, Security Alarm System applications, Supervision and monitoring alarm systems, Automatic monitoring system, Vending Machines security protection, Pumping Stations, Tanks, Oil or Water levels, Buildings and Real Estate, Weather Stations, River Monitoring and Flood Control, Oil and gas pipelines, Corrosion protection, Temperatures, water leakage applications, Wellheads, boat, vehicle, Energy saving, street lights control system, Valve controls, Transformer stations, Unmanned machine rooms, Control room application, Automation System, M2M, Access Control System, etc.

Safety Directions

Safe Startup

Do not use the unit when using GSM/3G/4G equipment is prohibited or might bring disturbance or danger.

Interference

All wireless equipment might interfere network signals of the unit and influence its performance.

Standard Packing List

Gateway X1; AC/DC Adaptor X1; GSM/3G/4G Antenna X1;User Manual X1; PC Configurator X1 .

Note: The package does not include any SIM card.

Optional:  35mm Standard DIN rail fixed Bracket

1Mainly Features

? GSM/GPRS/3G/4G network communication, can be operated from anywhere, no distance limitation;

? Wide range power supply 9~36VDC with over voltage and phase-reversal protection;

? Embedded ARM Cortex -M4 32 Bit RISC Core, 168 MHz inside, RTOS system, reliable performance with in-built watchdog;

? 8 digital inputs, compatibles dry and wet contact. Logic level: 0~0. 5V or short circuit treated as close, +3~30V or open circuits treated as open. First one input can be used as counter, sampling frequency is 1Mhz, second can be used as Arm/Disarm;

? 4 relay output (5A/30VDC,5A/250VAC), can auto control by timer, alarm-link and remote control by SMS, cloud. The first DO can set time to control by authorize number;

? 1 temperature & humidity sensor input for monitoring onsite environment, the sensor model is AM2301, Measures temperatures from -40-80°C,0.5°C accuracy, Relative Humidity from 0-99RH%, accuracy is 3%;

? 6 analog inputs, 12bits resolution, supports 0-5V, 0-20mA, 4-20mA output transducers;

? Inbuilt 8G SD card to save up to tens of thousands historical data and events;

? 1 RS485 port, support Modbus slave protocol, can link up to SCADA、HMI、DSC. Support Modbus Master protocol, can extend up to 16 Modbus Salve device, e.g.: Data Acquisition Module, meters, generator, PLC, VFD, etc., and 320 tags can set alarm value and content, also support data transparent transmission;

? Powerful SMS function: Threshold high SMS alert, SMS set, SMS inquiry, SMS command for Modbus PLC..., and SMS monitoring communication with Slaves;

? Inbuilt 2 DC output for external transducers to save wiring cost;

? Automatically resend the data while communication interrupt or failure, and failure will alert by SMS text to users;

? Supports remotely restart the RTU, and configure& operate it by SMS commands remotely;

? 10 SMS Alert and auto dial numbers for receiving alarm message, can program to receive specified alarm message. The authorized numbers also can dial to open the door or turn on/off machine with a free charge call at the specified time;

? Inbuilt inter-lock logic programmer and powerful timer program function;

? Modular structure design, replace a module can upgrade the network from 2G to 3G/4G or 3G to 4G;

? Support SMS, dial, GPRS, 3G , 4G network for alert, USB port for configuration and upgrade firmware;

? Inbuilt large capacity automatically rechargeable backup battery, alert when external power failure;

? Support TCP/UDP, Modbus TCP, Modbus RTU over TCP, King Pigeon IoT RTU protocol and data transparent transmission function;

? Using metal shell, protection class IP30. Metal shell and system security isolation, especially suitable for industrial applications in the field;

? L195 * W88 * H30mm, compatible wall installation and DIN35mm industrial rail installation.

Specifications