The Ebyte E34-DTU / E62-DTU / E90-DTU series is an industrial-grade wireless serial data transceiver radio modem built on high-performance RF architectures (2.4GHz & 433MHz), delivering up to 5km communication range over RS232 and RS485 interfaces, featuring full-duplex communication, automatic frequency hopping (FHSS), auto-retransmission, and industrial conformal coating for robust industrial automation and telemetry.
Key Features & Advantages
- Full-Duplex & High-Speed Data Streaming: E34-DTU(2G4D) and E62-DTU series support simultaneous bidirectional data transmission with no packet length limit, ensuring continuous and real-time serial transparent communication.
- Automatic Frequency Hopping (FHSS) & Error Correction: E34-DTU(2G4H) and E62-DTU feature automatic channel hopping across up to 50 frequency points, combined with CRC error detection, FEC forward error correction, and automatic packet retransmission to eliminate RF interference in complex industrial environments.
- Dual Industrial Interfaces & Flexible Wiring: Equipped with both standard DB9 RS-232 and 3.81mm pitch Phoenix screw terminal RS-485 interfaces, allowing direct connection to PLCs, HMIs, RTUs, and industrial controllers without signal converters.
- Triple Industrial Protection & Wide Voltage Input: Protected with conformal coating against humidity, salt spray, and fungus; supports DC 8~28V (or 10~28V) wide voltage input and industrial operating temperatures from -40°C to +85°C.
Core Specifications
| Parameter | Specification Details |
|---|---|
| Operating Frequency | 2.4~2.518 GHz (E34-DTU) / 425~450.5 MHz (E62-DTU) / 2.4~2.48 GHz (E90-DTU) |
| Transmit Power | 12 dBm (16mW) to 30 dBm (1W / 1000mW) |
| Communication Distance | 800m to 5.0 km (Clear line-of-sight test condition) |
| Communication Interfaces | RS-232 (Standard DB9 Female) & RS-485 (3.81mm Phoenix Screw Terminal) |
| Baud Rate Support | 1200 bps to 115200 bps (Up to 3 Mbps on E90-DTU) |
| Supply Voltage | DC 8V ~ 28V / 10V ~ 28V (Recommended 12V or 24V DC) |
| Antenna Interface | SMA-K (50 Ω Characteristic Impedance) |
| Operating Temperature | -40°C to +85°C (Industrial Grade) |
| Dimensions & Enclosure | 82 × 62 × 25 mm (Industrial Metallic Shielding Case) |
Product Selection Guide
Notice for Selection: Please verify your target deployment region and local ISM frequency regulations (2.4GHz Global ISM or 433MHz Sub-1GHz ISM) prior to placing an order.
| Model (SKU) | Frequency Band | TX Power | Test Range | Architecture & Features | Serial Interface |
|---|---|---|---|---|---|
| E34-DTU(2G4D20) | 2.4~2.505 GHz | 20 dBm (100mW) | 2.0 km | Full Duplex, Continuous Transmission, Unlimited Packet | RS232 / RS485 |
| E34-DTU(2G4D27) | 2.4~2.505 GHz | 27 dBm (500mW) | 5.0 km | High Power, Full Duplex, Continuous Transmission | RS232 / RS485 |
| E34-DTU(2G4H20) | 2.4~2.518 GHz | 20 dBm (100mW) | 2.5 km | Automatic Frequency Hopping, Auto Retransmit | RS232 / RS485 |
| E34-DTU(2G4H27) | 2.4~2.518 GHz | 27 dBm (500mW) | 5.0 km | High Power, Auto Frequency Hopping, Auto Retransmit | RS232 / RS485 |
| E62-DTU(433D20) | 425~450.5 MHz | 20 dBm (100mW) | 1.0 km | 433M Full Duplex, FHSS Hopping (up to 50 channels) | RS232 / RS485 |
| E62-DTU(433D30) | 425~450.5 MHz | 30 dBm (1.0 W) | 3.0 km | 433M 1W High Power, Full Duplex, FHSS Hopping | RS232 / RS485 |
| E90-DTU(2G4HD12) | 2.4~2.48 GHz | 12 dBm (16mW) | 800 m | Point-to-Point, FHSS, CRC/FEC Error Correction, Duplex | RS232 / RS485 |
Industrial Installation & Wiring
The DTU radio modem is housed in an industrial metallic casing and supports standard panel and DIN-rail mounting. Prior to system power-up, ensure correct DC power polarity and proper antenna grounding:
- Power Supply Wiring: Connect DC 8~28V (or 10~28V) power to the 3.81mm screw terminal (VCC / GND) or the standard DC 5.5×2.5mm power jack.
- Serial Port Connection: Use the DB9 female port for RS-232 communication (TXD, RXD, GND) or the 3.81mm screw terminals for RS-485 (A+, B-, GND). Note: RS-232 and RS-485 interfaces share the internal UART bus; do not send serial data to both physical ports simultaneously.
- Antenna Installation: Mount a 50 Ω SMA-K antenna securely. For high-power variants (27dBm / 30dBm), ensure adequate antenna clearance from metal cabinets and high-voltage power lines.
- Operating Mode Configuration: Use the on-board DIP switches to switch between normal transparent transmission mode and configuration mode.
Practical Application Scenarios
1. Industrial PLC & HMI Wireless Remote Telemetry
Enables reliable wireless bridging between PLCs (such as Siemens, Schneider, Mitsubishi, Omron) and field touchscreens or SCADA host computers via transparent RS485 Modbus RTU, replacing complex field cable trenching.
2. Solar Photovoltaic & Energy Storage Monitoring
Collects inverter data, battery management system (BMS) telemetry, and weather station metrics across large solar plants, utilizing high-power RF transmission and frequency hopping to overcome solar inverter electromagnetic noise.
3. Municipal Water Supply & Pipeline Pressure Telemetry
Provides robust point-to-point wireless serial connectivity between remote pump stations, flow meters, and central control rooms, ensuring data integrity across long distances in outdoor harsh environments.
4. Warehouse Automated Guided Vehicles (AGV) & Logistics Control
Delivers continuous full-duplex wireless data exchange between AGV dispatch management systems and mobile robotics, eliminating communication lag and packet loss during high-speed factory automation transit.
FAQ Section
1. What is the difference between E34-D (Full Duplex) and E34-H (Frequency Hopping) models?
The E34-DTU(2G4Dxx) models specialize in full-duplex continuous data streaming without packet length limits, ideal for simultaneous bidirectional telemetry. The E34-DTU(2G4Hxx) models feature automatic frequency hopping (FHSS) and automatic packet retransmission, providing superior anti-interference performance in crowded 2.4GHz RF environments.
2. Can the RS-232 and RS-485 ports be used at the same time?
The DTU provides both standard DB9 RS-232 and 3.81mm terminal RS-485 interfaces for maximum installation flexibility. However, because both ports are multiplexed onto the internal transceiver controller, they cannot transmit data simultaneously. Connect either RS-232 or RS-485 according to your industrial field device interface.
3. How does the 433MHz E62-DTU series compare to the 2.4GHz E34-DTU series?
The 433MHz Sub-1GHz band provides superior obstacle penetration and diffraction around metal structures and buildings, making the E62-DTU optimal for multi-floor factories and obstructed industrial parks. The 2.4GHz E34/E90 series operates in the license-free global ISM band with higher aerial data rates and lower antenna form factors.
4. What power supply and transient protections are recommended?
The radio modems operate on a wide DC 8V~28V (or 10V~28V) input range, with 12V or 24V DC recommended. For industrial installations subject to motor start-up surges or lightning transients, an external TVS diode and well-regulated industrial switching power supply are recommended.
