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<span style=''color:#FF8C00;''><strong>On Sale Now (Quantity limited) </strong></span> <br>
<strong>GT-540: <strike style=''color: #6b6b6b;''>$569.00</strike> <span style=''color:#FF0000;''>$398.30</strong></span><br>
Cellular Wireless Intelligent GPRS Data Server with 6 Digital Inputs, 2 Digital Outputs and 1 Analog Input.  Supports 2G Quad-band 850/900/1800/1900 MHz Frequencies.  Provides Wireless Access to Modbus RTU devices. Supports operating temperatures from -25℃ ~ +55℃


On Sale Now (Quantity limited)
GT-540: $569.00 $398.30

Cellular Wireless Intelligent GPRS Data Server with 6 Digital Inputs, 2 Digital Outputs and 1 Analog Input. Supports 2G Quad-band 850/900/1800/1900 MHz Frequencies. Provides Wireless Access to Modbus RTU devices. Supports operating temperatures from -25℃ ~ +55℃

  Price:  $659.00  

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GT-540 applicationThe GT-540 is an intelligent Active GPRS Remote Terminal Unit. With the high performance 32 bit CPU, the GT-540 is suited for the hard industrial environment. It features GPRS/GSM module, 6 digital inputs, 2 digital outputs, 1 analog input, 2 RS-232, 1 RS-485 and SD interface. It can be used in M2M application fields to transfer the local I/O or Modbus device’s data by GPRS by the defined period or DI/AI triggers. The local I/O data can also be stored in the SD card to become a remote data logger. For another communication path, the GT-540 offers the e-mail mode to transfer the data by e-mail via GPRS for users to choose. The simple I/O linkage function of the GT-540 can reach the real time control in local field. It also supports Li-ion battery as another power source when the main power is failed temporarily. Therefore, the GT-540 is an ideal solution for environmental monitoring and remote device management for M2M applications. Meanwhile, it is supplied with easy-to-use API and OPC server Software that streamline application development process, freeing system integrators from dealing with complex communication protocols of GPRS and the Internet.



Wireless Data Acquisition & Control System

GT-540 Applications

Wireless Data Acquisition

GT-540 Ap


  • Automatic/continuous GPRS Link Management
  • Support Modbus RTU protocol to connect to Max 3 Modbus RTU devices via RS-485 port
  • Support M2M OPC server for SCADA system
  • Easy-to-use API tool for users to develop their applications by various program development tools
  • Be the GPRS I/O devices
  • Support data transferring by E-mail
  • Local I/O linkage function to make the simple local control
  • Support 3.7V Li-ion Battery backup
  • Power supply 10 ~ 30 VDC


ICP DAS provides graphic tool for users to configure GT-540. The utility also can help users to test GT-540 in the Lab before they apply in the real site.

GT540 Utility


Software Solutions


The M2M RTU center software with friendly Graphic interface is to manage the GPRS RTU products easily. Users can monitor the I/O data and status of GPRS RTU devise by the interface on PC. By using the GPRS RTU API tool and M2M RTU center software, any remote monitoring system can be achieved easily and efficiently. For SCADA system, the M2M.OPC server is provided to connect to SCADA by OPC interface.

gt-540 Software Solutions

Web site
M2M RTU Center
EZ Data Logger
InduSoft SCADA
  • Easy to Establish GPRS Network Applications
    It is a big headache for engineers to establish the GPRS applications because the dynamic IP management is required. Applying the GT-540 and M2M RTU center software, the dynamic IP addresses can be managed between them. The remote GPRS RTU product would connect to M2M RTU Center automatically. Therefore, all remote GPRS RTU devices can be managed by s single centralized M2M GPRS RTU Center software with a fixed IP address. Moreover, there are M2M API tool and OPC server for engineers to develop the GPRS applications by VB, VC or SCADA development tools conveniently without any IP address management effort.
  • Active data transmission
    The GT-540 with active I/O transmission mechanism can raise the communication. Unlike the traditional poll communication, it would transfer the data by the defined time, DI trigger or AI hi/lo alarm. In addition to improve the way of communication, that can also reduce the AP effort.
  • Transfer data by e-mail
    Expect for the transferring data by the general communication with the M2M RTU center, users can choose the e-mail mode to send these data by e-mail over GPRS in the fixed time.
  • Modbus RTU device connectivity
    The GT-540 is built-in Modbus RTU protocol. That can make any Modbus RTU device connect to the GT-540. By the way of GT-540, Modbus RTU devices can be used in GPRS remote system. The max Modbus RTU device can be connected to the GT-540 is three.
  • Simple Local I/O link Control
    There are I/O built-in GPRS RTU devices of ICP DAS. Therefore, these products can be the GPRS I/O devices. Expect for these local I/O data can be sent to the host PC, the I/O link function of them help users to do the simple control in local field. For example: the DI trigger or high/low AI alarm can driver the DO channel.
  • Built-in I/O Data Logging
    The GT-540 provides an external SD interface. These local I/O and Modbus data are recorded in SD memory card for one day in a single file.

How to Use GT-540

GT-540 How To


32 bit, 96 MHz
64 Kbytes
Flash Memory
512 Kbytes
Gives time(sec, min, hour) & date, leap year compensation from 1980 to 2079
SD interface
2GB max.
Serial ports
RS-232 : TxD,RxD,GND for configuration
RS-485 : D2+, D2-
Digital Input
Input Channel
Input Type
Sink or Source, Isolated channel with common power or ground
Off Voltage Level
+1V max.
On Voltage Level
+3.5 ~ 24 VDC
Isolated Voltage
6 (16 Bit, 5~40Hz), Min. Pulse Width : 25ms
Digital Output
Output Type
Open-Collector (NPN) (100mA, 30V)
Load Voltage
+30 V max
Load Current
100 mA max
Isolated Voltage
Analog Input
12 bit
Input Range/Type
0 ~ 20 mA
GSM/GPRS system
Quad-band 850/900/1800/1900 MHz
GPRS multi-slot : class 10/8
GPRS mobile station : class B
GPRS class 10 : Max download speed 85.6 kbps
CSD max speed 14.4 kbps
Compliant to GSM phase 2/2+
 -Class 4(2W @ 900 MHz)
 -Class 1(1W @ 1800/1900 MHz)
Coding schemes : CS 1, CS 2,CS 3,CS 4
SMS: Text and PDU mode
Reverse polarity protection
Frame Ground Protection
ESD, Surge, EFT, Hi-Pot
Required Supply Voltage
+10 VDC ~ +30 VDC
with 600 mAh Li-ion battery backup
UL 94V-0 materials
Dimensions (W x L x H)
91 mm x 132 mm x 52 mm
Operating Temperature
-25 ℃ ~ +55 ℃
Storage Temperature
-40 ℃ ~ +80 ℃
Ambient Relative Humidity
5 ~ 95% RH, non-condensing

References and Support

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