The Ebyte E90-DTU(400SL42) is a high-power industrial wireless data transmission modem featuring Semtech SX1268 LoRa spread spectrum technology, operating across 410.125-493.125MHz with 15W (42dBm) output power and long-range RS232/RS485 communication up to 30km.
| Technical Parameter | E90-DTU(400SL42) Specification | Remarks / Details |
|---|---|---|
| Product Type | Industrial LoRa Wireless Data Modem (DTU) | Transparent serial data transmission gateway |
| RF Chipset / Modulation | Semtech SX1268 / LoRa Spread Spectrum | Next-generation LoRa core with high interference immunity |
| Operating Frequency Band | 410.125 MHz to 493.125 MHz | Default frequency 433.125 MHz (Sub-GHz ISM) |
| Transmitting Power | 15 W (42 dBm) | High-power industrial RF power amplifier output |
| Communication Range | Up to 30 km | Measured under open line-of-sight environment |
| Communication Interface | RS232 / RS485 Industrial Serial Ports | Direct connection to PLCs, RTUs, and HMIs |
| Enclosure & Mounting | Metal Enclosure, DIN-Rail / Wall Mounting | Rugged industrial enclosure for harsh outdoor setups |
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)
| 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.
Download the Technical Manual
Company Profile
Development Testin
Practical Application Scenarios
1. Ultra-Long Distance Oil and Gas Pipeline Monitoring Networks
Oil and gas gathering pipelines span tens of kilometers through desolate terrain without cellular coverage. By pairing the E90-DTU(400SL42) with field-deployed Ebyte MA01 series remote IO modules, pipeline pressure and valve status telemetry are aggregated over RS485 using Modbus RTU. Powered by its 15W high output power and SX1268 LoRa spread spectrum engine, the DTU bridges 30km links back to the central SCADA terminal without expensive satellite submetering or intermediate repeater stations.
2. High-Voltage Power Grid Substation and Line Telemetry
Electrical substations and high-voltage transmission towers operate in severe high-noise electromagnetic environments where standard short-range telemetry fails. The E90-DTU(400SL42) connects directly to RTU serial ports on power monitoring equipment. Utilizing Sub-GHz 433MHz signals paired with SX1268 anti-jamming code gains, the 15W modem reliably transmits line status and transformer diagnostic packets through substation barriers to regional grid dispatch centers.
3. Regional Smart Irrigation and Large-Scale Agricultural Reservoir Control
Expansive agricultural irrigation networks require central control of sluice gates, water pumps, and soil stations dispersed over broad watersheds. Connected to Ebyte wireless sensors and PLC master controllers, the E90-DTU(400SL42) acts as the high-power central data backbone. Its 30km line-of-sight coverage penetrates rural tree canopies and terrain elevations, delivering low-latency command routing for automated water management.
FAQ Section
1. What power supply and thermal dissipation precautions are required for the 15W high-power operation of the E90-DTU(400SL42)?
Because the E90-DTU(400SL42) delivers a peak RF power output of 15W (42dBm), the system requires a stable DC power supply capable of delivering sufficient peak current during transmission bursts. System integrators should ensure adequate airflow inside the control cabinet or attach the metal chassis to heat-dissipating panel structures to maintain optimal thermal stability during continuous transmission cycles.
2. Is the E90-DTU(400SL42) cross-compatible with other Ebyte E90 series LoRa modules operating on lower power levels?
Yes, the E90-DTU(400SL42) uses the same Semtech SX1268 LoRa core and modulation protocol as other Ebyte 433MHz E90 series modules and DTUs (such as 100mW or 1W models). As long as the operating frequency, air data rate, net ID, and address parameters match, the 15W DTU can function seamlessly as a long-range central master radio polling lower-power slave nodes across the network.
3. How does the SX1268 LoRa spread spectrum performance compare to legacy RF radio modems in noisy environments?
Compared to traditional FSK/GFSK narrow-band radio modems, the SX1268 LoRa chipset in the E90-DTU(400SL42) offers superior co-channel rejection and high receiver sensitivity. Combined with the 15W power amplifier, it achieves significantly higher link budget margins, effectively overcoming industrial RF interference, multi-path fading, and physical obstacles over long-distance links.
