The Ebyte E90-DTU(900SL42) industrial LoRa radio modem adopts Semtech SX1262 RF chip, 15W adjustable transmit power, max 30km open line-of-sight communication at 850.125–930.125MHz default 868MHz band, transparent RS232/RS485 serial, built-in FEC forward error correction, data encryption, multi-level relay networking, LBT channel monitoring, all-aluminum triple-proof housing, -40 to 85 Celsius industrial temperature, 12V DC power input, 1000-byte data buffer for long-distance industrial Modbus telemetry and cross-region IoT data transmission.
| Parameter Category | Parameter Item | Specification Value |
|---|---|---|
| Basic Info | Model Number | E90-DTU(900SL42) |
| Basic Info | RF Chip | SX1262 LoRa Spread Spectrum Chip |
| Basic Info | Dimension | 124mm * 109.1mm * 35.2mm |
| Basic Info | Net Weight | 425g |
| RF Performance | Frequency Range | 850.125MHz ~ 930.125MHz, default 868.125MHz |
| RF Performance | Max Transmit Power | 15W software adjustable, optional 10W mode |
| RF Performance | Max Open LoS Distance | 30km with standard 5dBi antenna |
| RF Performance | Air Data Rate Levels | 0.3kbps ~ 62.5kbps, 8 adjustable gears |
| Communication Spec | Serial Interface | RS232 DB9 + RS485 terminal block, transparent transmission |
| Communication Spec | UART Baud Rate Range | 1200bps ~ 115200bps, factory default 9600bps |
| Communication Spec | Data Cache Capacity | 1000 bytes TX/RX buffer |
| Communication Spec | Core Communication Functions | FEC error correction, data AES encryption, multi-hop relay, LBT channel detection |
| Electrical Spec | Supply Voltage | 12V DC, peak instantaneous current 4A |
| Electrical Spec | Transmit Working Current | 2.5A ~ 3.5A |
| Electrical Spec | Idle Standby Current | 30mA |
| Environmental Spec | Operating Temperature | -40 Celsius ~ 85 Celsius |
| Hardware Protection | Shell & PCB Protection | All aluminum housing, anti-mold anti-humidity anti-salt triple conformal coating |
| Model specifications | Operating frequency (Hz) | Transmitting power (W) | Reference distance (km) | Specifications and features | Recommended application scenarios |
| E90-DTU(900SL42) | 868.125M | 15 | 30 | LoRa spread spectrum anti-interference | Suitable for environments with long distances and susceptible to interference |
Note: Sunny weather, open environment without obstruction, 12V/4A power supply, 5dBi suction cup antenna, the antenna is 2 meters above the ground, and the factory default parameters are used.
| No. | Item | Specification | Description |
| 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 industrial grade use requirements |
| 4 | Antenna impedance | 50Ω | Standard 50Ω characteristic impedance |
| 5 | voltage range | 12±1V DC | It is recommended to support instantaneous current 4A |
| 6 | Communication Interface | RS232/RS485 | Standard DB9 female/5.08 terminal block |
| 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 band range (Hz) | Channel spacing (Hz) | Number of channels |
| E90-DTU(900SL42) | 868.125M | 850.125～930.125M | 1M | 81, half duplex |
Note: When using multiple groups of digital radio stations to communicate one-to-one at the same time in the same area, it is recommended that each group of digital radio stations set a channel spacing of more than 2MHz.
Transmit power level
| Model specifications | 10/15 W |
| E90-DTU(900SL42) | Software adjustable, default 15W |
Air speed class
| Model specifications | Default air rate (bps) | Number of levels | Air rate level (kbps) |
| E90-DTU(900SL42) | 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, when the speed meets the usage requirements, it is recommended that the lower the air speed, the better.
Current parameters
| Model specifications | Power supply voltage (V) | Emission current (A) | Waiting current (mA) |
| E90-DTU(900SL42) | 12±1 | 2.5~3.5 | 30 |
Transmitting and receiving length and packetization method
| Model specifications | Cache size | Packaging method |
| E90-DTU(900SL42) | 1000 bytes | Subpackage 32/64/128/240 bytes can be set by command to send |
Note: 1. If the data received by the radio in a single time is greater than the single packet capacity, the excess data will be automatically allocated to the second transmission until the transmission is completed;
2. The data received by the radio station at a time cannot be larger than the buffer capacity.
Practical Application Scenarios
1. Mountain Irrigation & Water Conservancy Long-Distance Telemetry
Overseas hydraulic engineering contractors deploy E90-DTU(900SL42) for mountain reservoir water level gauges, pipeline pressure sensors and sluice PLC controllers. Its 15W high-power LoRa output realizes stable 30km cross-mountain communication without signal repeaters, LBT noise monitoring avoids RF interference from mountain power lines, and FEC error correction eliminates data loss caused by terrain shielding. It interconnects with Ebyte E22 embedded LoRa modules installed on scattered sensor nodes to transmit hydrological Modbus data back to valley central monitoring rooms wirelessly.
2. Oil & Gas Field Wellhead Remote Data Collection
Global petroleum system integrators adopt this high-power LoRa radio for remote oil well pressure, temperature and flow transmitters. The 868MHz industrial band reserts heavy electromagnetic interference from oilfield pumping units and high-voltage transformers, triple-proof aluminum housing withstands coastal oilfield salt fog and wide temperature fluctuations, and built-in data encryption prevents private well production data leakage. Multi-hop relay networking extends coverage across dozens of dispersed well sites over dozens of kilometers.
3. Rural Large-Scale Precision Agriculture Irrigation Control
International agritech OEMs integrate E90-DTU(900SL42) into farm irrigation main control cabinets paired with field soil sensor terminals. 30km ultra-long transmission covers vast farmland without wired cable construction, adjustable 10/15W transmit power balances power consumption and coverage range, and sub-packet segmented transmission supports massive batches of soil PH, humidity and meteorological sensor data upload to agricultural cloud irrigation scheduling platforms.
4. Urban Suburban Smart Water/Gas AMI Meter Reading Network
Municipal energy engineering firms use this LoRa modem for suburban distributed smart meter cluster centralized collection. Long-distance signal penetrates dense residential building barriers, RS485 transparent transmission natively matches standard smart meter Modbus protocols, and 65536 independent address codes isolate multiple meter reading networks running simultaneously in the same town area to avoid cross-signal interference.
5. Large Mining & Tunnel Equipment Safety Monitoring
Mining infrastructure suppliers install E90-DTU(900SL42) on ground central control cabinets to receive underground gas concentration, conveyor belt and ventilation machine sensor signals. Low-frequency 868MHz LoRa waves deliver strong diffraction through rock and concrete tunnel barriers, industrial -40 to 85 Celsius range adapts underground high-temperature operation environments, and dual hardware watchdog circuits prevent communication breakdown from severe mine electromagnetic noise.
FAQ Section
1. What is the maximum effective communication distance of E90-DTU(900SL42), and what test conditions are required?
The rated 30km maximum transmission distance is tested under standard open sunny LoS conditions, equipped with 5dBi suction cup antenna mounted 2 meters above ground, factory default air rate 2.4kbps, 12V 4A regulated power supply and no terrain obstacles. Actual transmission distance will decrease with hills, buildings and metal shielding barriers.
2. What anti-interference technologies are integrated inside the SX1262 E90-DTU radio modem?
This industrial radio equips FEC forward error correction algorithm, LBT listen-before-talk channel pre-detection, LoRa direct sequence spread spectrum modulation and adjustable air data rate. LBT actively scans ambient noise before transmission to avoid occupied channels, while FEC automatically repairs corrupted data packets under heavy industrial electromagnetic interference.
3. Can E90-DTU(900SL42) build multi-hop relay long-distance networks with Ebyte E22 series LoRa modules?
Yes, the E90-DTU shares consistent LoRa modulation parameters, frequency channels and air rate gears with Ebyte E22 868MHz LoRa modules. Engineers can construct hybrid relay networks combining high-power E90-DTU base stations and low-power embedded E22 end nodes without modifying firmware or communication parameters.
4. What safety encryption mechanism does this industrial LoRa DTU support for industrial data transmission?
The device supports user-defined unique communication key encryption. Data packets can only be decoded and received by radio modems configured with identical keys, and the encryption key cannot be read out through serial AT commands, effectively preventing industrial production, meter reading and oilfield monitoring data from being illegally intercepted by third-party RF equipment.
5. What protection advantages does the all-aluminum triple-proof housing bring for outdoor industrial deployment?
Integrated thick aluminum alloy shell delivers excellent heat dissipation and electromagnetic shielding performance; the anti-mold, anti-humidity, anti-salt spray conformal coating covers all PCB circuits, stopping circuit oxidation, short circuit and component aging in coastal, mining and high-humidity field industrial working environments.
