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The Wireless GSM 3G RTU(Remote Terminal Unit) S280 is a cost effective remote terminal unit. It inbuilt quad band GSM/GPRS module (Or WCDMA/CDMA2000) , ISM Band 433Mhz Radio Frequency module, and ARM Cortex 32 Bit RISC Core. It is a multi Isolation I/O port remote terminal unit and wireless data acquisition system.The Wireless GSM 3G RTU S280 can be used for monitoring maximum 400 distributed I/O endpoints though maximum 50 wireless Data Acquisition Modules by RF 433Mhz wireless network. Also it can be used as for converting the meters, transducers, Data Acquisition modules, PLC data via RS485 serial port to 433 MHz wireless network and then transmits it to GSM/SMS/GPRS/3G/Ethernet network. It performs as a wired – wireless – SMS/GPRS/ 3G/Ethernet/RS232/RS485 gateway. The range covers about 2~5Km, plus WT-02 Wireless repeaters can increase the wireless distance.
The Wireless GSM 3G RTU can be used as:
A Wireless Data Acquisition System. Supports monitoring up to 50 wireless data acquisition module for maximum 400
endpoints by 433Mhz
wireless network, the range covers about 2~5Km, plus WT-02 Wireless repeaters can increase the wireless distance.
Each endpoint can be setup
threshold value or alarm conditions, once the value exceed threshold value or activated will send out SMS to alert the
users immediately.
A Wireless Gateway. Though the WT-01 wireless data transfer unit, it can convert the meters, transducers,
Data Acquisition modules, PLC data via RS485 serial port to 433 MHz wireless network and then transmits it to GSM/SMS/GPRS/3G/Ethernet network. It performs as a wired – wireless –SMS/GPRS/3G/Ethernet/ RS232/RS485 gateway.
A SMS Alarm Controller. The IO activations or deactivations can be reported by SMS and optionally confirmed by phone calls.
Each input can have its own message texts and the message can be programmed by users.
A Switch with SMS Remote Control. SMS texts for switching particular terminals on/off or pulse output are configurable.
A Timer-Switch which can be activated automatically. It can be setup when to performs preset logic events, e.g.
: timer reports its status, timer switch on/off device or equipments automatically.
A SMS reporter. The WIRELESS GSM 3G RTU can setup daily automatically report one or more times of its current status
to users automatically.
A Data Logger. The unit can save all of the events or acquisition data in internal memory storage, the historical data can
export to CS format via USB port or upload to server by GPRS /3G network according to schedule, no distance limitation.
Typically Applications
S280 Wireless GSM 3G RTU & Wireless DAM Table
| Model | Detail | 3G | Precision | DIN | T/H | DO | Record | Communication |
| S280 | More | V | 12bit | 4 | 1 | 2 | 3500 | USB/RS232/RS485 433Hz/GSM/GPRS/3G/RJ45 |
| WT-01 | More | Wireless DTU(Data Transfer Unit) with RS485 Port | ||||||
| WT-02 | More | Wireless Repeater, range 2~5Km | ||||||
| WT-03 | More | Wireless DAM, supports 1 Temperature&Humidity Sensor. | ||||||
| WT-05 | More | Wireless DAM, supports 1 Temperature&Humidity Sensor and 2 Analog input(0~5V) | ||||||
| WT-06 | More | Wireless DAM, supports 4 Analog input(0~5V) and 4 Digital Inputs | ||||||
| Notice | 1. *C stands for inbuilt module is CDMA2000. *W stands for inbuilt module is WCDMA. 2. RS232/RS485 serial port default is RS485, optional is RS232. | |||||||
1.Inbuilt ARM® Cortex™-M4 32 Bit RISC Core MCU;
2. Quadband 850/900/1800/1900Mhz GSM GPRS Module inside, 3G WCDMA / CDMA2000 Modules are optional;
3.Widely Rated voltage range, 9~36VDC, Inbuilt large capacity rechargeable backup battery;
4.Large internal memory to save up to 3500 historical records, USB port for configuration, upgrade firmware and export records;
5.Inbuilt industrial ISM Band 433Mhz Radio Frequency Half duplex communication module, distance up to 2~5Km;
6.Supports maximum 50 wireless Data Acquisition Modules, will alert users by SMS once the wireless DAM connect failure to
ensure the monitoring working properly;
7.Supports maximum 400 wireless distributed I/O endpoints;
8.2 solid relay outputs, rated capacity is 5A/30VDC,5A/250VAC;
9. 4 digital inputs, compatible to dry contact or wet contact inputs. Logic level: 0~0. 5V or short circuit treated as close,
+3~30V or open circuits treated as open;
10. 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%;
11. 1 RS485 serial port (Optional: RS232) for Modbus RTU Slave to SCADA or data transparent transmission;.
12. I/O ports with opto-isolated, RS232/485/RJ45 with 15KV ESD protection;
13. Supports Modbus TCP,TCP/IP protocol, Definition Protocol and transparent transmission over GPRS/3G/ Ethernet network;
14. Automatically resend the data while GPRS/3G/Ethernet communication interrupt or failure, GPRS/3G failure will alert
by SMS text to users;
15. Supports remotely restart the RTU, and configure& operate it by SMS commands remotely;
16. Supports over voltage protection and phase-reversal protection, provide DC power sources for external device to
save wiring cost;
17. 10 SMS Alert and auto dial numbers for receiving alarm message, can program to receive specified alarm message.
| Item | 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 | 850/900/1800/1900Mhz/ 3G WCDMA/3G CDMA2000 |
| Transmit power | Class 4 (2W) at EGSM 900 and EGSM 850 Class 1 (1W) at GSM 1800 and GSM 1900 |
| GPRS connectivity | GPRS multi-slot class 10 |
| GPRS Data Transmission | GPRS data downlink transfer: max. 85.6 kbps GPRS data uplink transfer: max. 42.8 kbps Coding scheme: CS-1, CS-2, CS-3 and CS-4 |
| TCP/IP stack | TCP,UDP |
| SIM interface | Supporting 3V SIM Card |
| External antenna | SMA Antenna interface, 50 Ohm |
| Program Interfaces | 1 USB Port |
| Protocols | SMS, GPRS UDP,TCP, Modbus RTU Slave, Modbus TCP and more equipment protocols can be added according to requirements. |
| RS232/485 | 1 RS485(Optional: RS232), Support Transparent transmission, definition protocol and Modbus RTU Slave. |
| RF433Mhz | Inbuilt RF433Mhz Half duplex communication module, wireless distance is 2~5Km, Max. receive sensitive: -148dBm,Max. transmit power: +27dBm. |
| Max. Wireless DAM | Supports Max. 50 wireless Data Acquisition Modules |
| Max. Wireless I/O | Supports Max. 400 wireless I/O |
| RJ45 | 1 RJ45, support definition protocol and Modbus TCP protocol. |
| Digital Inputs | 4 Digital input, NC/NO/Level type |
| Temp.&Hum Inputs | Temperature range: -40°C to +80°C. Humidity Range: 0~100%RH; |
| Relay Outputs | 2, Rated: 5A/30VDC,5A/250VAC |
| Power Outputs | 1 Port, 9~36VDC output for external device; |
| Memory Capacity | Internal Memory inside, can save the data for 3500events. |
| Backup Battery | 3.7V 1200mAH |
| Temperature range | -10-+70 °C |
| Humidity range | Relative humidity 95% (condensation free) |
| Exterior dimension | 168mm*113mm*32.3mm |
| Net Weight | 1000 g |
S280 Wireless GSM 2G RTU Controller unit *1
AC/DC Power adapter *1 (AC100~240V to DC 12V/2A, UK/USA/EU/AU plug available)
CD (PC Programming tool and User Manual) *1
GSM Antenna *1
433Mhz Antenna*1
Connectors *1 set
Optional Accessories:
Water Overflow Level Sensor, Oil Overflow Level Sensor, Water Leak Sensor, Temperature Sensor, Door Sensor,
PIR Motion Sensor,Smoke Sensor, Gas Leak Sensor, Glass Break Sensor, Shock Sensor, Power failure sensor, etc.
Return Policy
If the product you receive is not as described or low quality, the seller promises that you may return it before order completion (when you click "Confirm Order Received" or exceed confirmation timeframe) and receive a full refund. The return shipping fee will be paid by you. Or, you can choose to keep the product and agree the refund amount directly with the seller.N.B.: If the seller provides the "Longer Protection" service on this product, you may ask for refund up to 15 days after order completion.
Seller Service
On-time Delivery: If you do not receive your purchase within 60 days, you can ask for a full refund before order completion (when you click "Confirm Order Received" or exceed confirmation timeframe).Great Deals Wireless Data Acquisition System GSM SMS Alarm GPRS Remote Controller RTU RS485/232/RJ45 TCP/IP Protocol Temperature S280
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