4g lte Modem （DTU300）

The SeDTU300 from Xiamen Key-IoT is not your average industrial 4G LTE modem. This rugged workhorse is engineered to deliver secure, real-time wireless connectivity to keep your remote assets connected 24/7.

LTE Modem Products 62

Network Supportndustrial-grade 4G module, supports seven-mode full network, supports NB module
ModelDTU300
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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Introduction

Specifications

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Dimensions

An Industrial Fortress for Harsh Environments

Encased in a sturdy metal chassis, the SeDTU300 thrives in the harshest conditions seen in factories, utilities, and other industrial facilities. It shrugs off temperatures from -35°C to 75°C, humidity up to 95% RH, vibrations, shocks, and electromagnetic interference that spell doom for consumer-grade modems.

Flexible Installation for Challenging Spaces

With its compact footprint and DIN rail or wall mounting options, the SeDTU300 squeezes into the tightest cabinets and equipment enclosures. The flexibility allows on-site installation near your connected assets for most reliable connectivity.

Lightning-Fast 4G LTE Wireless Connectivity

LTE Category 4 support enables the SeDTU300 to deliver blazing 150Mbps downlink and 50Mbps uplink speeds over cellular networks for high-bandwidth applications. With dual SIM slots for automatic failover, uptime is maximized.

Secure Remote Access from Anywhere

Robust VPN, firewall, and routing capabilities allow the SeDTU300 to establish secure remote connections over public 4G LTE networks to provide authorized access to your controllers and HMIs from anywhere.

Real-Time Alerts to Keep Operations Running

With digital and analog I/O interfaces, the SeDTU300 can monitor connected devices in real-time and trigger alerts to quickly flag anomalies, preventing costly downtime.

Centralized Management of Distributed Sites

Xiamen Key-IoT's cloud management platform allows easy remote configuration, monitoring, and firmware upgrades for all your SeDTU300 modems from a central NOC.When uptime is critical and conditions are harsh, rely on the industrial-grade SeDTU300 4G LTE modem for mission-critical wireless connectivity.

Hardware Performance
FLASH	8MB SPI FLASH
SRAM	256KB
Network Support	ndustrial-grade 4G module, supports seven-mode full network, supports NB module
RTC	Time synchronization using NTP technology, with built-in RTC
Interface
Serial Ports	1 x RS232 AND 1 RS485 INTERFACE, BUILT-IN 15KV ESD PROTECTION, 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
Indicators	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)
Power	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
Chassis	Full metal chassis
Dimensions	Lengthwidthheight 1195926mm (excluding antenna mounting components)
Installation Methods	Desktop placement, DIN rail mounting, wall-mounted
Weight	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	IP30
Certification	Complies with CCC, RoHS
MTBF	≥ 100,000 hours

Technical Specification for SeDTU300 （Multi-Serial Port）

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Product Interfaces

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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.