GSM 3G 4G LTE Cellular IoT RTU S475(8DIN,6AIN/PT100,4Relay,1TH,USB,2 RS485,320 Extend I/O tags)

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  • 1 - 499 Boxes
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Lead Time:
Quantity(Boxes) 1 - 500 >500
Est. Time(days) 15 Negotiable
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Quick Details
Model Number:
Brand Name:
King Pigeon
Place of Origin:
Product name:
GSM 3G 4G LTE Cellular IoT RTU S475
DC Power supply:
DC 12V/1.5A Range 9-36VDC
SIM interface:
Supporting 3V and 1.8V SIM Card
Serial Interfaces:
1 USB Port
Digital Inputs:
8 Digital input
Analog Inputs:
6 Analog Inputs
Relay Outputs:
Mapping Registers:
Exterior dimension:
Supply Ability
Supply Ability:
9999 Box/Boxes per Week
Packaging & Delivery
Packaging Details
Gateway X1
AC/DC AdaptorX1
GSM/3G/4G Antenna X1
User Manual X1
PC ConfiguratorX1
Lead Time :
Quantity(Boxes) 1 - 500 >500
Est. Time(days) 15 To be negotiated
About Us

King Pigeon Hi-Tech.Co.,Ltd. is a leading GSM GPRS 3G 4G RTU Controller and GSM GPRS 3G 4G Industrial IoT Solution manufacturer since 2005. It provides a complete product lines  and Cloud Platform, APP solution to meet different applications.

***Mianly Products***

GSM 3G 4G SMS Controller Alarm

GSM 3G 4G Remote Switch

GSM 3G 4G Gate Opener  Intercom

GSM 3G 4G Remote Terminal Unit

GSM 3G 4G Modbus RTU 


GSM 3G 4G Power IoT RTU

433Mhz GSM 3G 4G Wireless RTU

Ethernet Remote I/O Module

Modbus RTU Remote I/O Module

GSM 3G 4G Security System

Web Server+Cloud Platform+APP


Quickly Guide List

GSM SMS GPRS 3G 4G RTU Controller Quick Selection Guide

Click Here

Modbus TCP Ethernet Remote I/O Module Quick Selection Guide

Click Here

Modbus RTU Remote I/O Module Quick Selection Guide

Click Here

GSM SMS 3G 4G Security Alarm Senior Care Quick Selection Guide

Click Here


 GSM 3G 4G LTE Cellular IoT RTU S475(8DIN,6AIN/PT100,4Relay,1TH,USB,2 RS485,320 Extend I/O tags)



Product Description


     Name: GSM 3G 4G LTE Cellular IoT RTU S475(8DIN,6AIN/PT100,4Relay,1TH,USB,2 RS485,320 Extend I/O tags)

The Cellular IoT 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(ultra high 24 bit resolution) or PT100 Resistance Temperature Detector (RTD) inputs, 4 relay outputs, 1 ambient sensor input for monitoring onsite temperature and humidity, 1 Ethernet RJ45 port for connect internet WAN or LAN, and 2 RS485 serial port, supports 128 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 Ethernet or 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 2 RS485 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. 2 RS485 ports can be used one as Modbus RTU Master and the other as Slave at the same time.


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.



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, 24bit 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 Modbus TCP protocol, can integrate to SCADA,HMI,DSC directly.

15. Supports RJ45 Ethernet port for connect internet, WAN or LAN;

16. 2 RS485 port supports Modbus RTU Master and Slave,  can be used to extend I/O ports or meters;

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

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

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

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

21. Inbuilt 8G SD card to save up to 100000 historical data and events;

22. Inbuilt large capacity automatically rechargeable backup battery;

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;

25.  L70 * W88 * H30mm, compatible wall installation and DIN35mm industrial rail installation.

 Technical Specification:



More information

Download User Manual, App, PC configurator please visit

For Industrial IoT Solutions:                           For Home Security Alarms:



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