1.Brief introduction

The Cellular IoT RTU S475/S475E 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 onsitetemperature and humidity,

1 Ethernet RJ45 port for connect internet WAN or LAN, and 2 RS485 serial port,supports 320 IO tags 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 S475/S475E inbuilt TCP/IP protocol stack make it suitable for internet of things (IoT) applications, it can be operated easily by the provided cloud, app, and web server, or integrated to your IoT

applications via 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 S475/S475E supports 2 RS485 ports,which can be used as Modbus RTU Master and Slave at the same time and supports transparent data transmission . 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/4Gnetwork.

 

2. Mainly Features

• GSM/GPRS/3G/4G network communication, can be operated from anywhere, no distance limitation;
• Quad band 850/900/1800/1900Mhz GSM GPRS Module inside,3G/4GModules are optional;
• Modular design, can easily upgrade the cellular module if network upgrade;
• Embedded ARM® Cortex™-M4 32 Bit RISC Core, 168 MHz inside, RTOS system, reliable performance with in-built watchdog;
• Wide range power supply 9~36VDC with over voltage and phase-reversal protection;
• 8 digital inputs, compatible dry and wet contact, DIN0 can be used as high speed pulse counter max 1MHz,DIN1-3 can be used as low speed pulse counter max 1KHz.DIN1 can arm and disarm ;
• 6 analog inputs, 24bit resolution, compatibles 0/4~20mA, 0~5V, can change to PT100 Resistance Temperature Detectors;
• 4 relay output (5A/30VDC, 5A/250VAC), compatibles pulse outputs;
• 1temperature & humidity sensor input for monitoring onsite environment, the sensor model is AM2301, Measures temperature from -40-80°C,0.5°C accuracy, Relative Humidity from 0-99RH%, accuracy is 3%;
• Inbuilt inter-lock logic programmer and powerful timer program function;
• Resend the data while communication failure and alert to users by SMS;
• Embedded TCP/IP protocol stack, support TCP/UDP, Modbus TCP, Modbus RTU over TCP , KingPigeon IoT RTU protocol and transparent transmission function, support self-defined handshake protocol active connecting server and automatically reconnect the server function after connection failure;
• Built-in TCP listening port, can be used as a TCP server, supports up to 5 terminal accesses;
• With dual SIM interface: SIM card 1 active, SIM 2 standby mode, improve communication quality;
• Supports RJ45 Ethernet port for connect internet;
• 2 RS485 port, supports Modbus RTU Master and Slave, can be used to extend I/O ports or meters;
• Supports SMS Alert when I/O triggered or recovery, and external power lost or recovery;
• Provides 1 channel 9~36VDC power source output for external device, saving wiring cost;
• Up to 10 SMS Alert and dial numbers, can program to receive specified alarm message,10 authorized numbers can switch on/off device with a free charge call at the specified time;
• Inbuilt 8G SD card to save up to 100000 historical data and events;
• Inbuilt large capacity automatically rechargeable backup battery;
• Using metal shell, protection class IP30. Metal shell and system security isolation, especially suitable for industrial applications in the field;
• L70 * W87 * H52mm, compatible wall installation and DIN35mm industrial rail installation.

 

3.Specifications

Item

Reference Scope

DC Power supply

Standard adapter: DC 12V/2A  Range 9-36VDC

Power consumption

Standby:12V/130mA;  Working Max.: 12V/500mA

GSM Frequency

850/900/1800/1900Mhz

3G/4G

Optional: WCDMA/TDD-LTE/FDD-LTE

TCP/IP stack

TCP,UDP

SIM interface

Dual SIM Card,supporting 3V and 1.8V SIM Card

External antenna

SMA Antenna interface, 50 Ohm, Gain: 3dB

Serial Interfaces

1 USB Port

Protocols

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

Ethernet

1 RJ45 Ethernet port for connect internet.

RS485

2 RS485, Support Transparent transmission and Modbus RTU Slave, Modbus RTU Master.

Digital Inputs

8 Digital input, NC/NO type,wet /dry contact .DIN0 can be used as high speed pulse counter max 1MHz,DIN1-3 can be used as low speed pulse counter max 1KHz.DIN1 can arm and disarm.  

Analog Inputs

6 Analog Inputs. 24 bit resolution, 0-5V or 0-20mA or 4-20mA;

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;

Extend I/O tags

Max.320

Memory Capacity

Internal 8G SD card inside, can save the data for 100000events.

Backup Battery

3.7V 850mAH

Temperature range

-20°C ~ +70 °C

Humidity range

Relative humidity 95% (condensation free)

Exterior dimension

70mm*87mm*52mm

Net Weight

350g