The Ebyte E810-DTU(RS) is a compact (82x84x25mm, 130g) and highly cost-effective industrial-grade bidirectional converter featuring an isolated RS232 (DB9 female) interface to standard RS485/RS422 conversion, supporting stable 5V to 36V wide-voltage power input and reliable transparent transmission for seamless serial device integration.
| Spec Category | Parameter Dimension | Technical Specifications (Ebyte E810-DTU(RS)) |
| Core Function | Device Type | Industrial RS232 to RS485/RS422 Bidirectional Converter |
| Isolation Protection | Built-in physical electrical isolation | |
| Interface Specs | RS232 Port | 1 x DB9 Female Interface |
| RS485/RS422 Port | Terminal Block (A+, B-, Y+, Z- pins) | |
| Communication Mode | Bidirectional transparent transmission | |
| Electrical Specs | Operating Voltage | 5V to 36V DC |
| Operating Current | Ultra-low power consumption design | |
| Physical Specs | Case Material | Metal enclosure |
| Dimensions | 82 mm x 84 mm x 25 mm | |
| Product Weight | 130 grams (plus or minus 5 grams) |
| No. |
Parameter | Specifications |
| 1 |
Power Supply |
5V ~ 36V, over 36V may burn out,12V or 24V power supply is recommended |
| 2 |
Working Current |
24mA @ 12V |
| 3 | Transmitting Method |
Asynchronous half-duplex or asynchronous full-duplex |
| 4 | Transmission medium |
Twisted pair or shielded wire |
| 5 | Interface characteristics | Interface compatible with EIA / TIA RS232C, RS485 / RS422 standards |
| 6 | Interface method | RS232: DB9 female connector,RS485 / RS422: 1 * 5 * 3.81, crimping method |
| 7 | Transmission distance |
1200 meters (RS485 port), 5 meters (RS232 port) |
| 8 | Operating temperature | -40 ℃ ~ + 85 ℃, industrial grade |
| 9 |
Working humidity |
10% ~ 90%, relative humidity, non-condensing |
| 10 | Size | 82 × 84 × 25mm |
| 11 |
Average weight |
130 ± 5g |
Practical Application Scenarios
Scenario 1: Legacy PLC and CNC Machine Communication Bridging
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Regional Industry Pain Points: Many older-generation PLCs, CNC controllers, and industrial machines in European and North American factories only feature standard RS232 DB9 serial ports, which are limited to short transmission distances of about 15 meters. Replacing these high-value machines with modern ethernet equivalents is too expensive for factory operators.
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Ebyte Technical Solution: By plugging the E810-DTU(RS) directly into the machine's DB9 RS232 port, engineers can immediately convert the signal into isolated RS485 or RS422. This extends the reliable communication distance up to 1200 meters, allowing the legacy CNC machines to easily communicate with central SCADA monitoring systems across the factory floor.
Scenario 2: High-Reliability Electrical Substation Modbus Monitoring
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Regional Industry Pain Points: Electrical substations and distribution facilities generate severe high-voltage surges, transient spikes, and strong electromagnetic fields. In these harsh environments, non-isolated serial converters easily burn out, risking critical data loss or destroying the connected host PC's expensive serial motherboard ports.
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Ebyte Technical Solution: The E810-DTU(RS) is designed with onboard physical isolation circuitry. By placing this converter between the substation’s monitoring computer (RS232 interface) and the daisy-chained Modbus power meters (RS485 interface), it isolates electrical surges. This protects both the host PC and remote field instruments from destructive ground loops and transient voltage spikes.
Scenario 3: On-Site Engineering System Debugging and Prototyping
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Regional Industry Pain Points: Commissioning engineers traveling to remote industrial sites often carry bulky test gear and struggle with wiring setups. They require compact, robust, and highly adaptive conversion tools that can run on whatever power rail is available in the on-site cabinet.
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Ebyte Technical Solution: Measuring just 82x84x25mm, the E810-DTU(RS) fits easily in any technician's tool bag. Because it supports a very wide operating voltage range from 5V up to 36V DC, engineers can power the device directly from standard 12V or 24V industrial control cabinet rails, making on-site field testing and PLC debugging fast and straightforward.
FAQ Section
Q1: Does the E810-DTU(RS) require software configuration or driver installation?
A1: No. The E810-DTU(RS) is a pure hardware-level, bidirectional isolated transceiver converter. It does not require any custom software configuration, registry setup, or virtual COM port driver installation. It operates in complete transparent transmission mode, meaning any data bytes fed into the RS232 side are instantly converted and sent out of the RS485/RS422 side, and vice versa.
Q2: What is the main benefit of the wide 5V to 36V power input range?
A2: Most basic commercial converters require a very strict and narrow 5V power supply. In typical industrial environments, control cabinets usually standardize on 12V or 24V DC rails, which can experience fluctuations when large motors turn on or off. The wide 5V to 36V input range of the E810-DTU(RS) ensures it runs reliably on standard cabinet power systems without requiring dedicated voltage step-down converters.
Q3: How does the internal isolation protect my host controllers?
A3: The E810-DTU(RS) features built-in electrical isolation barriers. This design physically separates the sensitive RS232 circuitry connected to your host PC from the long-distance RS485/RS422 field bus lines. If lightning strikes, a high-voltage short-circuit, or a ground loop surge occurs on the long field lines, the isolation barrier stops the spike from passing through, saving your expensive monitoring server from hardware damage.
Q4: Can I use this device to convert RS232 to both RS485 and RS422 simultaneously?
A4: While the hardware physical terminal blocks support connections for both 2-wire RS485 (A+/B-) and 4-wire RS422 (Y+/Z-), you should only operate one bus system type at a time to prevent signal collisions. Ensure your field wiring matches either the RS485 network topology or the RS422 network topology for clean, error-free communication.
