GPRS M2M RTU GSM IoT Solutions Modbus TCP/UDP S272

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$100.00 - $120.00 / Pieces | 1 Piece/Pieces (Min. Order)
Lead Time:
Quantity(Pieces) 1 - 100 101 - 500 >500
Est. Time(days) 5 12 Negotiable
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Quick Details
Place of Origin:
Guangdong, China
Brand Name:
King Pigeon
Model Number:
S272 3G/4G
GSM 850/900/1800/1900 MHZ or 3G/4G
Digital input:
Analog input:
Relay Output:
Temperature Humidity:
1 temp and humidity input
Modbus TCP,Modbus RTU, TCP/IP
SMS, PC, App
1USB+1 RS232+1 RS485 +1RJ45
Supply Ability
Supply Ability:
10000 Piece/Pieces per Month
Packaging & Delivery
Packaging Details
Lead Time :
Quantity(Pieces) 1 - 100 101 - 500 >500
Est. Time(days) 5 12 To be negotiated

GSM 3G 4G M2M RTU (8DIN,6AIN/PT100,4Relay,1TH,USB,RS485)

GPRS M2M RTU GSM IoT Solutions Modbus TCP/UDP S272

The GSM 3G 4G M2M 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. It can monitoring

and operates the I/O ports by SMS, APP, Web Server, internet, timers and programmed inter-lock events automatically.


The GSM 3G 4G M2M 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 GSM 3G 4G M2M 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 GSM 3G 4G M2M 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 GSM 3G 4G M2M RTU supports transparent data transmission and performs as Modbus Slave over GPRS/3G/4G/NB-IoT network and RS485 serial port.

Mainly 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.  8 digital inputs, compatibles dry and wet contact, one of it can be used as pulse counter;

8.  6 analog inputs, 12bit resolution, compatibles 0/4~20mA, 0~5V, can change to PT100 Resistance Temperature Detectors;

9.   4 relay output (5A/30VDC, 5A/250VAC), compatibles pulse outputs;

10. 1 ambient sensor input for monitoring onsite temperature and humidity;

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

12. Resend the data while communication failure and alert to users by SMS;

13. Inbuilt TCP/IP protocol stack, supports cloud, APP and web server applications.

14. Supports transparent data transmission and Modbus protocol over RS485 and GPRS/3G/4G/NB-Iot networks, performs as Modbus Slave;

15. Supports SMS Alert when I/O triggered or recovery, and external power lost or recovery;

16. Provides 1 channel 9~36VDC power source output for external device, saving wiring cost;

17. Up to 10 SMS Alert and dial numbers, can program to receive specified alarm message.

18.10 authorized numbers can switch on/off device with a free charge call at the specified time;

19. Inbuilt 4G SD card to save up to 100000 historical data and events;

20. Inbuilt large capacity automatically rechargeable backup battery;

21.  Industrial class design suitable for long time work applications;

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

23.  L175 * W88 * H30mm, compatible wall installation and DIN35mm industrial rail installation.



Technical Specification:


Reference Scope

DC Power supply

Standard adapter: DC 12V/1.5A  Range 9-36VDC

Power consumption

Standby:12V/70mA;  Working Max.: 12V/300mA

GSM Frequency




TCP/IP stack


SIM interface

Supporting 3V SIM Card

External antenna

SMA Antenna interface, 50 Ohm, Gain: 3dB

Serial Interfaces

1 USB Port


SMS, GPRS UDP,TCP, Modbus RTU, Modbus TCP and more equipment protocols can be added according to requirements.


1 RS485, Support Transparent transmission and Modbus RTU Slave

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;

Optional: each AIN can change to PT100 RTD inputs.

Temp.&Hum Inputs

Temperature range: -40°C to +80°C, Humidity Range: 0~100%RH;

Relay Outputs

4, Rated: 5A/30VDC,5A/250VAC

Power Outputs

1 Port, for external device;

Memory Capacity

Internal 4G SD card inside, can save the data for 100000events.

Backup Battery

3.7V 1200mAH

Temperature range

-10-+70 °C

Humidity range

Relative humidity 95% (condensation free)

Exterior dimension


Net Weight



Typically applications:


       1.      BTS Monitoring;

2.      Security Alarm System applications;          

3.      Supervision and monitoring alarm systems;

4.      Automatic monitoring system;             

5.      Vending Machines security protection;

6.      Pumping Stations, Tanks, Oil or Water levels;

7.      Buildings and Real Estate;

8.      Weather Stations; 

9.      River Monitoring and Flood Control;

10.   Oil and gas pipelines;  

11.   Corrosion protection

12.   Temperatures, water leakage applications;

13.   Wellheads, boat, vehicle;

14.   Energy saving, street lights control system;

15.   Valve controls;

16.   Transformer stations;   

17.   Unmanned machine rooms;

18.   Control room application;

19.   Automation System, M2M;

20.   Access Control System, etc.


Standard Package:



AC/DC AdaptorX1

GSM/3G/4G Antenna X1

User Manual X1

PC ConfiguratorX1





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