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ZHL4921W
ZHL4921W

Product DescriptionNetwork Port RTU Pulse Counter rs485 Module DTU Modbus Switch Rs232 Communication Data Converter IOT Router ZHL4921W 152Self-built serverIf you have your own serversZHL4921W can com

  • Interface type:1LAN/2DI/1DO/1AI/1RS485/232
  • Agreement:Modbous TCP/IP
  • Network type:4G
  • Positioning support:Yes
  • Features:WIFI

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Product Description


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MetInfo enterprise content manager system | MetInfo CMS

MetInfo enterprise content manager system | MetInfo CMS

MetInfo enterprise content manager system | MetInfo CMS

Network Port RTU Pulse Counter rs485 Module DTU Modbus Switch Rs232 Communication Data Converter IOT Router ZHL4921W 152

Self-built server

If you have your own servers

ZHL4921W can communicate directly with the client server after simply configured. The ZHL4921W follows the Modbus RTU/TCP protocol and also supports 485-channel transparent transmission protocols. 

MetInfo enterprise content manager system | MetInfo CMS

Network Port RTU Pulse Counter rs485 Module DTU Modbus Switch Rs232 Communication Data Converter IOT Router ZHL4921W 152


If you don't have a Cloud Server

When some customers use the configuration software, they can't directly connect the PC and S485. The ZHL4921W supports the ZH-Cloud transmission. The customer only need to install the virtual serial port, the data of the ZHL4921W can be forwarded to the local serial port of the PC, which is more convenient and quick.

(Also applicable to scenarios without a cloud server)

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Network Port RTU Pulse Counter rs485 Module DTU Modbus Switch Rs232 Communication Data Converter IOT Router ZHL4921W 152

Configuration software docking



ZHL4921W has an RS485 interface, which supports the standard modbus RTU/TCP protocol. The

configuration software can directly read and command the ZHL4921W through the RS485 interface.


Network Port RTU Pulse Counter rs485 Module DTU Modbus Switch Rs232 Communication Data Converter IOT Router ZHL4921W 152


The ZHL4921W supports networking functions and supports one-to-one and multiple-to-one networks. This need is very practical for some specialization scenarios.


Analog auto-calibration threshold reporting.

The ZHL4921W presets the analog linear calibration parameter value, the user only needs to modify the k/b value to achieve the linear calibration effect. In addition, the effect of analyzing the analog data can be realized by adjusting the k/b value, and the threshold will be reported.

MetInfo enterprise content manager system | MetInfo CMS

MetInfo enterprise content manager system | MetInfo CMS

MetInfo enterprise content manager system | MetInfo CMS

Product Applications


Network Port RTU Pulse Counter rs485 Module DTU Modbus Switch Rs232 Communication Data Converter IOT Router ZHL4921W 152


DTU/RTU Modem is required in many places. Such as factory reservoirs, reservoirs for irrigation of farmland, water towers for water supply, water levels for rivers, etc. It is important to monitor the water level remotely. Network Port RTU Pulse Counter rs485 Module DTU Modbus Switch Rs232 Communication Data Converter IOT Router ZHL4921W has a built-in GPRS module that can receive the water level value returned by the water level detector and transmit the data to the monitoring center.
Complete the on-site data acquisition and upload function with the water level detector. Suitable for complex terrain and remote mountainous conditions, it can be used in pool water level monitoring, water tower water level monitoring, water tank water level monitoring, reservoir water level monitoring, river water level monitoring, natural gas storage tank liquid level monitoring, and oil storage tank liquid level monitoring.

MetInfo enterprise content manager system | MetInfo CMS

MetInfo enterprise content manager system | MetInfo CMSMetInfo enterprise content manager system | MetInfo CMS

MetInfo enterprise content manager system | MetInfo CMS

MetInfo enterprise content manager system | MetInfo CMS


MetInfo enterprise content manager system | MetInfo CMS

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