RTU Modem WCDMA (3G) 1 kênh AI + 6 kênh DI + 2 kênh DO+ RS-485 Modbus ICP DAS GT-540-3GWA CR

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GT-540-3GWA CR 3G Remote Terminal Unit (RoHS) (Asia Only)

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RTU Modem WCDMA (3G) 1 kênh AI + 6 kênh DI + 2 kênh DO+ RS-485 Modbus ICP DAS GT-540-3GWA CR


  • Automatic/continuous WCDMA/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 WCDMA/GPRS I/O devices.
  • Local I/O linkage function to make the simple local control.
  • Support 3.7V Li-ion Battery backup.
  • Power supply 10 ~ 30 VDC.


GT-540-3GWA is an intelligent Active 3G Remote Terminal Unit. Within the high performance 32 bit CPU, GT-540-3GWA is suit for the hard industrial environment. It features 3G(WCDMA) module, 6 digital inputs, 2 digital outputs, 1 analog input, 1 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 via 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, GT-540-3GWA offers the e-mail mode to transfer the data by e-mail via 3G for users to choose. The simple I/O linkage function of GT-540-3GWA 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, GT-540-3GWA 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 3G and the Internet.


Service RTU


CPU Module
CPU 32 bit CPU
Flash 512 Kbytes
SRAM 64 Kbytes
Storage Expansion 4GB max.
Real Time Clock Gives time(sec, min, hour) & date, leap year compensation from 1980 to 2079
Watchdog Timer Yes


LED Indicators
Status 1 x EXT
1 x 3G
1 x STA


2G System
Coding Schemes CS 1, CS 2,CS 3,CS 4
Downlink transfer: Max. 85.6 kbps; Uplink transfer: Max. 42.8kbps
Frequency Band 850/900/1800/1900 MHz
GPRS Multi-slot GPRS class 12; GPRS station class B
Power Class Class 4 (2 W @ 850/900 MHz)
Class 1 (1 W @ 1800/1900 MHz)


3G System
Data Transmission HSPA
Downlink transfer: Max. 7.2 Mbps; Uplink transfer: Max 5.76 Mbps
HSDPA Max. 7.2 Mb/s
WCDMA Max. 384 kb/s Download/Upload link
Frequency Band WCDMA 850/900/1900/2100 MHz
Power Class Class 3 (250mW @ WCDMA/HSPA)


Analog Input
Channels 1
Type Current
Range 0 ~ 20 mA
Resolution 12 bit
Isolation 3750Vrms


Digital Input
Channels 6
Type Sink or Source, Isolated channel with common power or ground
Wet Contact, ON Voltage Level +3.5 ~ 30 VDC
Wet Contact, OFF Voltage Level +1V max.
Isolation 3750Vrms


Digital Input/Counter
Response Speed 6 (5~40Hz), Min. Pulse Width : 25ms


Digital Output
Channels 2
Type Open-Collector (NPN) (100mA@30VDC)
Load Voltage +30 V max.
Max. Load Current 100 mA max.
Isolation 3750Vrms


COM Ports
Ports 1 x RS-232 (Configuration)
1 x RS-485 (Modbus device)


Consumption Idle: 65 mA @ 24 VDC; Data Link: 170 mA @ 24 VDC; Peak: 450 mA @ 24 VDC


Casing Plastic
Dimensions (mm) 91 x 132 x 52 (W x L x H)
Installation DIN-Rail


Operating Temperature -25 ℃ ~ +75 ℃
Storage Temperature -40 ℃ ~ +80 ℃
Humidity 5~95% RH, non-condensing


Data Sheet


Ordering information

GT-540-3GWA     CR  3G Remote Terminal Unit (RoHS) (Asia Only)

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