The Ebyte E90-DTU(400SL37) is a rugged, military-grade LoRa wireless data transceiver based on the SX1268 chip, featuring an operating frequency of 433MHz, a high-power 37dBm (5W) transmission output, and an impressive 20km communication range, equipped with versatile industrial-standard RS232/RS485 interfaces for reliable long-distance data acquisition.
| Technical Parameter | Specification Details |
|---|---|
| RF Chipset | Semtech SX1268 |
| Operating Frequency | 410 to 493 MHz (Default 433 MHz) |
| Transmit Power | 37 dBm (approx. 5W) |
| Communication Distance | Up to 20 km (open area) |
| Communication Interface | RS232 / RS485 |
| Interface Standard | Industrial Grade |
Download Datasheet
E90-DTU(400SL37) Manual
XCOM
Configuration tool
E90-DTU-CE Certification
E90-DTU-FCC Certification
E90-DTU-SRRC Certification
Ebyte Company Profile
| Category | Parameter Name | Specifications | Remarks |
|---|---|---|---|
| RF Parameters | Working Frequency | 410.125 ~ 493.125 MHz | Default: 433.125 MHz |
| Transmitting Power | 37 dBm (About 5W) | Supports long-range transmission | |
| Communication Distance | 20 km | Line-of-sight condition | |
| Air Data Rate | 0.3k ~ 62.5 kbps | Default: 2.4 kbps | |
| Channel Numbers | 85 | Half duplex communication | |
| Modulation Technology | LoRa Spread Spectrum | Based on SX1268 chip | |
| Electrical Parameters | Power Supply | DC 10V ~ 36V | Recommended to use 12V or 24V |
| Transmitting Current | ~ 1100 mA | At 37dBm (5W) output | |
| Stand-by Current | ~ 50 mA | - | |
| Hardware & Physical Parameters | Communication Interface | RS232 / RS485 | Standard DB9 Hole / 3.81 terminal |
| Antenna Type | SMA-K | SMA female | |
| Dimensions | 124 × 105 × 25 mm | 102 × 105 × 25 mm without interface | |
| Weight | 253 ± 5 g | - | |
| Housing Material | Military-grade aluminum alloy | - | |
| Buffer | 1000 bytes | Can be sub-packed to 32/64/128/240 bytes | |
| Environmental Ratings | Operating Temperature | -40°C to +85°C | Industrial grade standard |
| Ingress Protection | IP67 | Waterproof and dustproof | |
| Three Protections | Anti-Fungal, Anti-Humidity, Anti-Salt Spray | Military-grade three-proof coating |
Key Features
Military-Grade Durability
Designed for extreme environments with hardened components meeting military specifications for shock, vibration, and temperature resistance.
Long-Range Communication
37dBm transmission power enables reliable 20km line-of-sight communication using LoRa spread spectrum technology.
Industrial Interface Support
Standard RS232/RS485 interfaces provide seamless integration with PLCs, SCADA systems, and industrial control equipment.
Wide Voltage Compatibility
Operates reliably with 10-36V DC input, suitable for vehicle-mounted, solar-powered, and unstable power supply scenarios.
Frequency Flexibility
Configurable operating frequency between 410.125-493.125MHz (default 433.125MHz) for regional compliance.
Technical Specifications
RF Parameters
- Frequency Range: 410.125-493.125MHz
- Default Frequency: 433.125MHz
- Transmission Power: 37dBm (5W)
- Communication Range: 20km (line-of-sight)
Physical Specifications
- Dimensions: 124×105×25mm
- Weight: 253±5g
- Housing: Military-grade aluminum alloy
Electrical Specifications
- Power Input: DC 10-36V
- Interfaces: RS232 + RS485
- Antenna Connector: SMA female
Environmental Ratings
- Operating Temp: -40°C to +85°C
- Ingress Protection: IP67-rated enclosure
Application Scenarios
Military Field Operations
Battlefield communications, remote surveillance systems, and tactical equipment networking in harsh environments.
Industrial Automation
Reliable data transmission between distributed control systems in oil rigs, mining operations, and manufacturing plants.
Critical Infrastructure
Monitoring and control systems for power grids, water treatment facilities, and transportation networks.
Remote Sensing
Environmental monitoring stations in extreme locations like deserts, mountains, and arctic regions.
Disaster Response
Emergency communication networks during natural disasters where conventional infrastructure fails.
| RF Parameter | Value | Remark |
|---|---|---|
| Working frequency | 410.125~493.125 MHz | Default: 433.125MHz |
| Transmitting power | 37 dBm | About 5W |
| Air data rate | 0.3k~62.5kbps | Default: 2.4kbps |
| Test distance | 20000 meter | - |
| Hardware Parameter | Value | Remark |
|---|---|---|
| Size | 102 * 105 * 25 mm | Without interface |
| Antenna type | SMA-K | - |
| Communication interface RS232 / RS485 | Standard DB9 Hole / 3.81 | connecting terminal |
| Channel numbers | 85 | Half duplex |
| Buffer | 1000 bytes | Can be sub-packed to 32/64/128/240 byte each time via command |
| Electronic parameter | Min. | Typ. | Max. | Unit | Condition |
|---|---|---|---|---|---|
| Power supply | 10 | - | 36 | V | It is recommended to use 12V or 24V |
| Transmitting current | - | 1100 | - | mA | 37dBm（5W） |
| Stand-by current | - | 50 | - | mA | - |
| Operating temperature | -40 | 20 | +85 | ℃ | - |
| Operating humidity | 10 | 60 | 90 | % | - |
| Storage temperature | -40 | 20 | +125 ℃ | - |
Practical Application Scenarios
1. Large-Scale Agricultural Irrigation Control
In vast agricultural zones where cellular network coverage is poor or expensive, the E90-DTU(400SL37) acts as a central transmission hub. It bridges the command signals from a remote control room to field-deployed water pumps and irrigation valves. By leveraging its 20km transmission range, engineers can eliminate the need for expensive wired infrastructure across kilometers of farmland, ensuring high-efficiency water management.
2. Mining and Tunnel Asset Monitoring
Mining operations often require data transmission through complex tunnels and underground structures where high-frequency signals cannot penetrate. The 433MHz sub-GHz frequency provides excellent diffraction capabilities, allowing this LoRa transceiver to maintain stable data links for equipment status monitoring and safety alarms. Its ruggedized casing ensures operational reliability in high-vibration and dusty underground environments.
3. Smart Power Grid and Distribution Automation
Utility companies utilize the E90-DTU(400SL37) to connect remote distribution transformers and electrical substations to central monitoring stations. The 37dBm high transmission power ensures that critical grid telemetry data—such as voltage, current, and fault indicators—is transmitted reliably over long distances, providing real-time visibility into grid health and reducing the need for manual inspection.
FAQ Section
1. Does this transceiver support communication between different interface types like RS232 and RS485?
Yes, the E90-DTU(400SL37) is designed for industrial flexibility. It can operate in scenarios where a PLC with RS485 communicates with a PC terminal via RS232. The hardware transparently handles the conversion, allowing for seamless integration into existing legacy systems without requiring additional protocol converter hardware.
2. Is there a specific software tool required for configuring the transceiver parameters?
Yes, we provide an official Configuration tool that allows engineers to easily modify operating parameters such as frequency channel, air data rate, and transmission power. This ensures that you can optimize the device performance to match your specific application requirements and comply with local RF regulations.
3. How does the 37dBm transmit power affect the power supply requirements?
The 37dBm (5W) output power is significantly higher than standard IoT modules. Consequently, it is critical to ensure that your DC power supply can handle the peak current demands during transmission bursts. We recommend using a high-stability power supply with sufficient amperage headroom to prevent voltage drops that could potentially reset the device or degrade signal quality.