1. Brief Introduction
The Wireless GSM 3G RTU(Remote Terminal Unit) S280 is a cost effective remote terminal unit. It inbuilt quadband 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 S280 equips 4 digital inputs, 2 solid relay outputs, power status detection moulde, and onsite temperature and humidity inputs. All of the inputs and outputs are isolation.

The Wireless GSM 3G RTU S280 can be used as Wireless SMS Alarm, when the equipped I/O or 400 distributed I/O alarm occurrence, it also can send pre-definition SMS to up to 10 mobile phone users.

The Wireless GSM 3G RTU S280 is suitable for lots of applications, e.g.: Wireless data logging, BTS monitoring, remote data acquisition, telemetrically, farm, energy saving, agriculture, automatically meter reading system, weather station, storage, factory and other applications.

The Wireless GSM 3G RTU S280 supports Modbus RTU Slave, Modbus TCP, TCP/UDP, SMS and data transparent transmission protocol through RS232/RS485/GSM/SMS/GPRS/3G./Ethernet.

2.The Wireless GSM 3G RTU can be used as:
  A Wireless Data Acquisition System. Supports monitoring up to 50 wireless data acquisition modulefor 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.

3.Business contact :

Mata Lee

Skype:gsmrtusystem