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Powerful Cellular RTU Gateway RT620

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The RT620 series is a rugged, Programmable enable cellular Romote Terminal Unit (RTU) Gateway designed for demanding IoT/M2M applications across industries such as Smart City, Remote Monitoring, Automation, Environmental Protection, and Water Conservancy.

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  • Overview
  • Specification
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Wlink RT620 series is a rugged, programmable cellular-enabled Remote Terminal Unit (RTU) Gateway, designed for demanding IoT/M2M applications across industries such as Smart City, Remote Monitoring, Automation, Environmental Protection, and Water Conservancy. Built with a compact, protective metal casing, it ensures reliable performance in harsh environments while simplifying deployment and maintenance.


The RT620 supports versatile interfaces, including LAN/WAN, RS232/RS485, analog inputs (4–20mA/0–5V), and digital inputs for sensors such as temperature monitors, door switches, or smoke detectors. Its programmable functionality allows customization of DI/AI interfaces and Modbus properties, making it highly adaptable to diverse applications.




Robust Connectivity & Protocol Support

  • Industrial-grade 4G/3G cellular module with

  • APN/VPDN private network compatibility.

  • 1 WAN/LAN and 1 LAN port, support standard routing features.

  • Standard TCP/IP, HTTP/HTTPS and VPN protocols support.

  • Integrated MQTT and Modbus RTU protocols for seamless integration.


Versatile I/O & Programmability

  • 3 RS485 ports

  • 12 analog inputs (AI)

  • 16 digital inputs (DI)

  • 24V/12V/5V Power Output for sensors.

  • 2 Relays for external control.

  • Programmable local script


Advanced Features

  • Optional built-in GPS and data storage forlocation tracking and offline reliability.

  • Real-time clock (RTC) for time-stamped data logging.

  • Support WLINK M2M Platform remotemanagement.

Industrial Durability & Flexibility

  • Rugged metal housing with optimized EMC design for harsh environments.

  • Wide-range voltage input and operating temperature.

  • Pluggable industrial terminal blocks for easy

  • installation and maintenance.



Application 

  • Refrigerator Vehicle Monitoring

  • Oil field

  • Coal mine

  • Security Monitoring

  • Environment Protection

  • Water Conservancy

  • Heating &Natural gas

  • Power SCADA



  Diagram



  DimeInterface Diagram




  • Cross-connect TXD and RXD of RS232 communication interface.

  • N/O switch signals break and close with GND.

  • The analog signal sensor can be shared with the device VIN +. When the power supply is shared, there is no need for a common ground, and the signal output can be directly connected to AI +. If the analog signal sensor uses the power supply input alone, you need to connect the GND of the power supply and the GND of RT620 to form a common ground.

  • The relay is a small signal relay that can support up to 60 VDC / 0.3A switch control or 125 VAC / 0.5A switch control

  • LAN and WAN port support 10/100Mbps

  • Support 3G/4G, DHCP, Static IP and PPPoE


  Power Supply Input and Output

  • Power Input: The V+ V- are no polarity design, can be arbitrary access to positive and negative, anti - reverse. The input voltage range is +18V~32V DC, and the +24V/1A DC power adapter is recommended

  • Power Output: 2 channels VIN output, the output voltage is approximately equal to the VIN input voltage value (actual voltage is VIN-1.1V); 2 channels + 12V voltage power supply output; 1 channel + 5V voltage power supply output. The output voltage power supply can directly supply power to external sensors, or to control relays, or provide power to 0 ~ 5V DI digital signal input devices.

  • Relay Interface: 2 relay interfaces-Close normally closed, COM common node, Open normally open. Small signal relay, support control Max 1A / 30V DC; 0.3A / 60V DC; 0.5A / 125V AC



  • RS485 Interface: It supports 3 channels RS485 interface communication and can be used to directly connect to RS485 interface devices, such as sensors or meters. The default baud rate is 9600, which can be configured through the Web page. The baud rate range is 1200 ~ 57600

  • RS232 Interface: 1 channel RS232 serial port, the default baud rate is 115200, used for local software upgrade or parameter.

 Serial Interface



 Digital Signal Input

Active digital signal input (Wet Contact): 4 channels of active 0~5V digital signal input, the GND of the input signal source and the system GND need to be in common ground




  • Active digital signal input (Wet Contact):  

4 channels of active 0~5V digital signal input, the GND

of the input signal source and the system GND need to

in common ground.


  • Passive digital signal input(Dry Contact): 

12 channels passive switch signal input


 Analog Signal Input


·         12 channels analog signal input, sampling accuracy is 12Bit. It can be connected with 4 ~ 20mA power sensor or 0 ~ 5V voltage sensor. We use it by compiling the script



Application Reference

·   Digital switch signal wiring diagram




·    AI analog signal input: It supports 4~20mA or 0~5V analog signal input


Luka
Emma
Mircosoft Team
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