The Ebyte E810-U21 is an industrial-grade USB to 2-way RS485 converter powered by the FT2232HL chip, offering 1500Vrms power isolation and 3750Vrms signal isolation. Operating at DC 4.5~5.5V via Type-C, it ensures robust multi-device communication with EMC Level 3 protection, 600W TVS surge resistance, and performs reliably in -40 to +85 Celsius environments.
| Parameter | EBYTE E810-U21 Specification |
|---|---|
| Chip Solution | FT2232HL |
| Operating Voltage | DC 4.5~5.5V (5V USB Type-C interface power supply) |
| USB Interface | Type-C, USB 2.0 |
| RS485 Interface | 2 independent channels (2 channels spring terminals; 4 channels Phoenix plug-in terminals) |
| Isolation Protection | 1500Vrms power isolation / 3750Vrms signal isolation (Isolated version only) |
| Surge & Short Circuit | 600W TVS electrostatic surge protection / PTC short circuit protection |
| EMC Protection Level | Industrial EMC Level 3 (Electrostatic contact 4KV, air discharge 8KV; Pulse group diff 1KV, common 2KV) |
| Operating Temperature | -40 to +85 Celsius, 5% to 95% RH (no condensation) |
| Product Size | 100 * 54 * 32 mm |
| project | illustrate |
| Working voltage | 5V USB interface power supply |
| interface | USB interface: type-c interface communication, version 2.0 |
| RS485 interface: 2 channels are spring terminals; 4 channels are Phoenix plug plug-in terminals | |
| Isolation and protection | 1500Vrms power isolation (only supported by isolated version) |
| 3750Vrms signal isolation (only supported by isolated version) | |
| 600W TVS electrostatic surge protection | |
| PTC short circuit protection | |
| Protection level | Industrial EMC Level 3 |
| Electrostatic contact 4KV, air discharge 8KV | |
| Pulse group differential mode 1KV, common mode 2KV | |
| Working temperature and humidity | -40～+85℃, 5%～95%RH (no condensation) |
| Storage temperature and humidity | -40 ~ +105℃, 5% ~ 95%RH (no condensation) |
Practical Application Scenarios
1. Industrial Factory Automation Control
In modern factory floors, a central industrial PC needs to communicate with multiple field devices simultaneously without data bottlenecking. By utilizing the E810-U21's 2-way independent RS485 ports via a single USB Type-C connection, engineers can bridge the PC to an array of PLCs and Ebyte Remote I/O modules. The independent channels prevent mutual interference, ensuring high-speed, synchronized polling of sensor statuses and motor controls across different production lines.
2. Smart Grid and Substation Monitoring
Power distribution environments are notorious for high electromagnetic interference and fatal voltage spikes. The E810-U21 acts as a critical fail-safe when connecting monitoring servers to smart meters and Ebyte DTUs on the RS485 bus. Thanks to its 1500Vrms power isolation, 3750Vrms signal isolation, and Industrial EMC Level 3 protection, it completely insulates the expensive host computer from ground loops, 600W electrostatic surges, and 8KV air discharges, guaranteeing uninterrupted data acquisition in substations.
3. Agricultural IoT Environmental Monitoring
Greenhouse automation requires continuous data collection from disparate node networks across large outdoor areas. The E810-U21 seamlessly integrates into edge gateways, operating flawlessly in extreme -40 to +85 Celsius temperatures with high humidity. It connects the gateway to Ebyte LoRa environmental sensors (via RS485 receivers) on one channel, while the second channel manages HVAC control systems, providing stable, long-distance communication in harsh, non-condensing rural deployments.
FAQ Section
1. Does the E810-U21 require an external power supply to operate?
No, the module is highly efficient and designed to draw its required DC 4.5~5.5V power directly from the host PC or gateway via the USB Type-C interface. Its built-in transceiver circuitry smoothly handles the single-ended USB to RS-485 conversion without the bulk or necessity of an external power adapter.
2. Can the two RS485 ports communicate independently without mutual interference?
Yes. Powered by the FT2232HL dual-channel USB UART IC, the device expands a single USB port into two completely separated RS485 networks. Each channel has independent pin control and automatic transceiver switching, meaning high-traffic polling on network A will not disrupt or collide with data acquisition on network B.
3. What operating systems and drivers are compatible with this converter?
Because the module utilizes the industry-standard FTDI FT2232HL chip solution, it is natively recognized or easily supported by mainstream operating systems including Windows, Linux distributions, and Mac OS. Engineers can utilize standard VCP (Virtual COM Port) drivers provided by FTDI, ensuring plug-and-play integration for embedded systems and industrial computers.
