E90-DTU(400SL42) Industrial-Grade Wireless Data Transmission Radio
E90-DTU(400SL42) is a high-quality industrial-grade wireless data transmission radio using LoRa spread spectrum technology, operating at 410.125-493.125MHz (default 433.125MHz), with a maximum transmission power of 15W and a communication distance of up to 30km.
Key Features
Advanced Communication Technology
Utilizes LoRa direct-sequence spread spectrum technology for superior anti-interference capability and extended communication range.
Industrial-Grade Design
Operates reliably in extreme temperatures (-40°C to +85°C) with IP-rated aluminum alloy housing for optimal heat dissipation and EMI shielding.
Enhanced Security
Supports user-configurable communication encryption keys and AES-128 grade data encryption for secure transmissions.
Network Flexibility
Enables multi-level relay networking, point-to-point communication, broadcast transmission, and channel monitoring capabilities.
Intelligent Signal Management
Features LBT (Listen Before Talk) functionality to monitor channel noise and RSSI signal strength indication for real-time signal quality assessment.
Technical Specifications
RF Parameters
- Frequency Range: 410.125-493.125MHz
- Default Frequency: 433.125MHz
- Max Transmission Power: 15W (41.5±0.5dBm)
- Communication Distance: Up to 30km (clear conditions, 5dBi antenna)
- Air Data Rate: 2.4K-62.5Kbps (configurable)
Physical Specifications
- Dimensions: 124×109.1×35.2mm
- Weight: 425g ±5g
- Antenna Interface: SMA-K (50Ω impedance)
Power & Interfaces
- Voltage Range: DC 8-28V (recommended 12V)
- Communication Interfaces: RS232/RS485
- Baud Rate: 1200-115200bps (default 9600bps)
Environmental Ratings
- Operating Temperature: -40°C to +85°C
- Humidity Tolerance: 5% to 95% RH (non-condensing)
Application Scenarios
Industrial Automation
PLC communication, remote sensor monitoring, and SCADA systems in manufacturing facilities.
Smart Infrastructure
Building automation solutions, smart grid monitoring, and utility meter reading systems.
Security Systems
Wireless alarm networks, access control systems, and perimeter security monitoring.
Environmental Monitoring
Remote weather stations, hydrological monitoring, and agricultural sensor networks.
Transportation Systems
Railway signal control, traffic management systems, and remote telemetry units.
| Model Specifications | Working frequency (Hz) | Transmitting power (W) | Reference distance (km) | Specifications | Recommended Application Scenarios |
| E90-DTU(400SL42) | 433.125M | 15 | 30 | LoRa spread spectrum anti-jamming | Suitable for long-distance, interference-prone environments |
Note: Sunny weather, open environment without shelter, 12V/4A power supply, 5dBi suction cup antenna, the height of the antenna from the ground is 2 meters, and the factory default parameters are used.
| serial number | project | Specification | illustrate |
| 1 | Product Size | 124*109.1*35.2mm | See installation dimensions for details |
| 2 | product weight | 425g | Weight tolerance 5g |
| 3 | Operating temperature | -40℃～+85℃ | Meet the needs of industrial use |
| 4 | Antenna Impedance | 50Ω | Standard 50Ω characteristic impedance |
| 5 | voltage range | 12±1VDC | It is recommended to support instantaneous current 4A |
| 6 | Communication Interface | RS232/RS485 | Standard DB9 socket/5.08 terminal blocks |
| 7 | baud rate | Factory default 9600 | Baud rate range 1200～115200 |
| 8 | address code | Factory default 0 | A total of 65536 address codes can be set |
Frequency range and number of channels
| Model Specifications | Default frequency (Hz) | Frequency range (Hz) | Channel spacing (Hz) | number of channels |
| E90-DTU(400SL42) | 433.125M | 410.125～493.125M | 1M | 84, half duplex |
Note: In the same area, multiple sets of digital radios are used for one-to-one communication at the same time. It is recommended that each set of digital radios be set with a channel interval of more than 2MHz.
Transmit power level
| Model Specifications | 10/15W |
| E90-DTU(400SL42) | Software adjustable, default 15W |
Air Speed Class
| Model Specifications | Default air rate (bps) | number of grades | Air rate class (kbps) |
| E90-DTU(400SL42) | 2.4k | 8 | 0.3, 1.2, 2.4, 4.8, 9.6, 19.2, 38.4, 62.5 |
Note: The higher the air speed setting, the faster the transmission rate and the shorter the transmission distance; therefore, if the speed meets the requirements of use, it is recommended that the air speed be as low as possible.
Current parameter
| Model Specifications | Supply voltage (V) | Emission current (A) | Waiting current (mA) |
| E90-DTU(400SL42) | 12±1 | 2.5~3.5 | 45 |
Send and receive length and subpackage method
| Model Specifications | cache size | Subcontracting |
| E90-DTU(400SL42) | 1000 bytes | Subpackage 32/64/128/240 bytes can be sent by command setting |
Note: 1. If the single data received by the station is greater than the capacity of a single packet, the excess data will be automatically allocated to the second transmission until the transmission is completed.
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