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Lte Cat4 Modem(DTU300)
Lte Cat4 Modem(DTU300)
Lte Cat4 Modem(DTU300)
Lte Cat4 Modem(DTU300)
Lte Cat4 Modem(DTU300)
Lte Cat4 Modem(DTU300)

Lte Cat4 Modem(DTU300)

  • Network Supportndustrial-grade 4G module, supports seven-mode full network, supports NB module
  • ModelDTU300 Cat4
  • VoltageExternal power adapter (9V 1A)
  • Interface 1 RS232 and 1 RS485 interface, built-in 15KV ESD protection
  • BrandKEY-IOT
  • Dimensions119*59*26mm
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In the dynamic world of industrial automation, the SeDTU300 Series 4G/CAT4 Industrial DTU stands out as a true trailblazer. This cutting-edge LTE Cat4 modem is engineered to revolutionize the way you approach wireless communication, empowering you to establish reliable and efficient data transmission channels over TCP/IP. With the SeDTU300, remote control and monitoring of your industrial sites have never been more seamless.

Built for the Rigors of Industry

Crafted with industrial-grade components, the SeDTU300 Series is designed to withstand the demands of even the most challenging environments. At its core, a high-performance industrial MCU and an embedded real-time operating system ensure rock-solid stability and dependability, giving you the confidence to rely on this modem for your mission-critical applications.Seamlessly integrate the SeDTU300 with your existing serial devices through its RS232 and RS485 interfaces, as well as the abundant IO options. This versatility allows for transparent data transfer and efficient IO data acquisition, streamlining your industrial operations.

Flexible Configuration, Centralized Management

The SeDTU300 Series offers unparalleled flexibility when it comes to configuration and management. Whether you prefer local PC tools, AT command configuration, or TCP/IP remote setups, this modem adapts to your preferred workflow, simplifying on-site installation and subsequent maintenance.Take your efficiency to new heights with the SeDTU300's support for batch operations and centralized management. Easily configure, upgrade, and monitor multiple devices from a single platform, saving you time and resources.

Robust Data Security and Reliability

Data security is paramount in the industrial landscape, and the SeDTU300 Series excels in this regard. Leveraging dual data center backup transmission and multi-data center synchronization, this LTE Cat4 modem ensures your critical information remains safe and accessible, even in the face of network disruptions.Seamlessly integrate the SeDTU300 with your existing systems through its standard TCP/IP protocol stack and support for APN/VPDN functionality. Elevate your industrial communication with the power of LTE Cat4 technology.

Tailored to Your Needs

The SeDTU300 Series is designed to be a true partner in your industrial automation journey. It supports Modbus TCP/Modbus RTU protocol conversion, enabling effortless integration with your industrial SCADA and field devices. Moreover, you can customize the TCP/UDP login and heartbeat data packets to suit your specific requirements, enhancing site awareness and link persistence.

Comprehensive Remote Management and Monitoring

Managing your industrial communication systems has never been easier. The SeDTU300 Series LTE Cat4 modem supports SMS-based parameter configuration, local serial port configuration, and upgrades. Additionally, leverage cloud-based platforms to remotely manage, upgrade, and configure your devices, streamlining your workflow and minimizing on-site visits.For environmental monitoring applications, the SeDTU300 is compliant with the HJ 212-2017 pollutant online monitoring system data transmission standard. Its 2-channel IO for digital input/output and 2-channel AI for analog current/voltage input further expand its versatility.

Elevate Your Industrial Connectivity with SeDTU300

The SeDTU300 Series LTE Cat4 modem is the ultimate solution for industrial wireless communication, empowering you to unlock new levels of efficiency, reliability, and convenience. Embrace the future of industrial automation and experience the transformative power of this cutting-edge technology today.

  Hardware Performance





Network Support

ndustrial-grade 4G module, supports seven-mode full network, supports NB module


Time synchronization using NTP technology, with built-in RTC



Serial Ports


1 RS232 and 1 RS485 interface, with built-in 15KV ESD protection Serial port parameters as follows:

Data bits: 5, 6, 7, 8 bits

Stop bits: 1, 1.5, 2 bits

Parity: None, even, odd, SPACE, and MARK parity

Serial port baud rate: 1200~230400bits/s


1 PWR light, 1 ACT light, 1 Oline light

SIM Card Interface

1 (drawer-type SIM card slot, supports 1.8V/3V SIM/UIM cards)

Antenna Interface

1 (3G/4G/NB antenna, 1 GPS antenna (optional), impedance 50 ohms, SMA female inner pin interface)


Terminal interface, with built-in power reverse protection and overvoltage protection

Power Characteristics


Power Supply

External power adapter (9V 1A)

Operating Voltage

Wide power input DC 5~36V (expandable to 5-60V)

Standby Power Consumption

Operating power consumption

Operating Conditions


Operating Temperature

-35~+75℃ (-31~+167℉)

Storage Temperature

-40~+85℃ (-40~+185℉)

Operating Humidity

5%~95% (non-condensing)

Device Ventilation

Natural heat dissipation, no noise

Physical Features



Full metal chassis


Length*width*height 119*59*26mm (excluding antenna mounting components)

Installation Methods

Desktop placement, DIN rail mounting, wall-mounted


Net weight: 0.35KG (excluding antenna and mounting components)

Gross weight: 0.68KG (with accessories and packaging box)

Device Safety and Reliability


Safety and Reliability

Power reverse protection, overvoltage protection, overcurrent protection; Ethernet interface with built-in 1.5KV electromagnetic isolation protection; RS232/RS485 interface with built-in 15KV ESD protection; SIM/UIM card interface with built-in 15KV ESD protection

Protection Level



Complies with CCC, RoHS


≥ 100,000 hours


Product Interfaces

Product Dimensions





Q & A

Shipping Time and Logistics

We have a large stock of products readily available, and we can typically ship orders within 1-3 business days. For customized products, the shipping time may vary depending on the specific requirements, but it generally takes around 2-4 weeks. We collaborate with several renowned logistics companies, offering a variety of express delivery options such as SF Express, EMS, and DHL to ensure timely and secure product delivery.

Custom Development Services

In addition to our standard products, we also offer custom development services to our clients. Whether you have any special feature requirements or application scenarios, our experienced engineering team can provide customized development and optimization based on your needs. The customization process typically takes 1-3 months, and we work closely with you to ensure that the final delivered product fully meets your requirements.

Product Warranty and After-sales Service

All our products undergo rigorous testing and come with a 1-year warranty. If any quality issues arise during the warranty period, we provide free repair or replacement services. Beyond the warranty period, we also offer long-term technical support and maintenance services. Customers can contact our after-sales team via phone, email, or other channels, and we will respond promptly and provide solutions.




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