E95-DTU(433L20-485)-V8 is an industrial-grade RS485 LoRa wireless data transmission terminal operating in the 410-441MHz band, delivering a 20dBm output power, 3km long-range transparent transmission, and a rugged DIN-rail mount design supporting 8-28V DC input.
| Main Parameter | Specification / Performance | Technical Remarks |
|---|---|---|
| Model Number | E95-DTU(433L20-485)-V8 | Rail-mounted industrial wireless modem / DTU |
| Core Technology | LoRa Spread Spectrum | Military-grade anti-interference modulation core |
| Operating Frequency | 410 ~ 441 MHz | Default 433MHz channel, 32 half-duplex channels |
| Transmit Power | 20 dBm | Optimized for long-range, low-power telemetry |
| Communication Distance | 3 km | Reliable line-of-sight transparent transmission |
| Communication Interface | RS485 (3.81 Terminal Block) | Supports standard Modbus RTU protocol parsing |
| Operating Voltage Supply | 8 ~ 28 V DC | Ideal for 12V or 24V industrial power rails |
| Antenna Impedance | 50 Ω | Standard SMA interface characteristic impedance |
| Physical Dimensions | 92 * 67 * 30 mm | Standard DIN-rail type installation structure |
Download Manual
E95 DTU Manual
XCOM
Configuration tool
Ebyte Company Profile
E95 DTU FCC Certification
Communication Test Video Tutorial
Key Specifications
| Mode | Working Frequency Hz | Transmit Power dbm | Distance km | Specifications | Recommended Application Scenarios | |
|---|---|---|---|---|---|---|
| E95-DTU(433L20-485) | 410/441M | 20 | 3 | Lora spread spectrum anti-interfernce | Suitable for small data volume and long-distance application environment | |
| No. | Term | Specification | Description |
|---|---|---|---|
| 1 | Size | 92*67*30 mm | Review installation dimensions for details |
| 2 | Weight | 95g | Weight tolerance 5g |
| 3 | Working Temperature | -40℃～+85℃ | Meet the needs of industrial use |
| 4 | Antenna impedance | 50Ω | Standard 50Ω characteristic impedance |
| 5 | Voltage Range | 8～28V DC | Recommend to use 12V or 24V |
| 6 | Interface | RS485 | 3.81 terminal block |
| 7 | Baud Rate | Default 9600 | Baud rate range 1200～115200 |
| 8 | Address Code | Default 0 | A total of 65536 address codes can be set |
| Model | Default Frequency Hz | Frequency Range Hz | Channel Spacing Hz | Number of Channels | |
|---|---|---|---|---|---|
| E95-DTU(433L20-485) | 433M | 410～441M | 1M | 32，Half Duplex |
| Model | Transmitting Current mA 12V|24V |
Waiting Current mA 12V|24V |
||
|---|---|---|---|---|
| E95-DTU(433L20-485) | 230 | 135 | 20 | 12 |
Application Scenarios
Factory Floor PLC and Sensor Telemetry
In industrial manufacturing plants, wire routing between central PLCs and distributed sensors across heavy machinery is difficult and expensive. The E95-DTU(433L20-485)-V8 integrates an industrial RS485 port and standard Modbus RTU transparent translation to bridge this gap. Operating at 433MHz with a 3km range, it bypasses complex physical wiring constraints, easily transmitting critical sensor registers through structural factory floors back to the central SCADA system.
Water Treatment & Automated Pump Station Monitoring
Distributed pumping stations and flow-metering nodes in water treatment facilities require constant monitoring across expansive, multi-kilometer layouts. The E95-DTU(433L20-485)-V8 utilizes military-grade LoRa spread spectrum modulation to counter severe multipath signal attenuation caused by large liquid tanks and metal structures. Its 20dBm output power guarantees consistent data links, while its 8-28V DC power range allows it to plug directly into standard 24V cabinet rails.
Photovoltaic Array & Smart Solar Farm Data Acquisition
Solar farms cover large geographical areas where standard wireless systems drop out due to severe outdoor electromagnetic fields. The E95-DTU(433L20-485)-V8 solves this using its high-reliability 410-441MHz LoRa transmission core, maintaining stable connections up to 3km. Housed in a standard DIN-rail casing, it installs inside string combiner boxes to relay real-time voltage, current, and temperature parameters to central control rooms without signal degradation.
FAQ
Q: How does the internal power supply design of the E95-DTU(433L20-485)-V8 support the wide 8-28V DC input range without overheating?
A: The DTU utilizes an internal high-efficiency buck switching regulator (DC-DC step-down converter) rather than a linear regulator. This configuration allows it to step down common industrial 12V or 24V power rails to the internal 3.3V logic level with minimal thermal dissipation, preventing thermal buildup inside the plastic enclosure even during continuous 20dBm transmission cycles where peak current reaches 230mA at 12V input.
Q: What are the impedance matching and ground loop considerations when connecting the RS485 terminal to long-distance industrial buses?
A: The RS485 interface features standard differential signaling, but over long cable lengths or high EMI environments, impedance mismatches cause signal reflections. Engineers should terminate the differential lines with a 120-ohm resistor across the A and B terminals at the final node. Furthermore, ensuring the signal ground is tied properly prevents high common-mode voltages from exceeding the transceiver threshold, shielding the internal logic gates from destructive ground loop currents.
Q: Why does the 433MHz frequency band and LoRa modulation provide better penetration in industrial plants compared to 2.4GHz Wi-Fi?
A: The 433MHz band features a significantly longer wavelength than 2.4GHz networks, allowing the radio waves to diffract around large metallic obstacles and concrete walls rather than being absorbed. Combined with LoRa spread spectrum technology, the module gains a high coding gain and structural noise immunity, allowing it to demodulate signals successfully even when the received signal strength falls below the ambient thermal noise floor of the factory environment.
Q: How should the 50-ohm SMA antenna connection be optimized when the DTU is locked inside a metal electrical control cabinet?
A: A metal electrical enclosure acts as a Faraday cage, which completely blocks the 20dBm RF signals from propagating outward. To maintain the 3km communication range, an external antenna must be used by routing a low-loss 50-ohm coaxial feeder extension cable from the internal SMA bulkhead interface to the outside of the cabinet. The antenna must be mounted vertically on the exterior surface or a separate mast, ensuring its radiation path has a clear line-of-sight away from large grounded metal plates to avoid detuning the antenna impedance.
