E810-U16/U17 Series USB to Serial Converter TTL/RS485

E810 series (U16/U17) encompasses industrial-grade USB to serial (TTL/RS485/RS232/RS422) converters, engineered to provide highly stable protocol bridging and reliable data transmission in electrically noisy industrial environments. Product Model E810-U16 E810-U17 E810-U16C E810-U17C E810-U16H E810-U17H Chip Solution FT232RL FT232RL CH343G CH343G FT232HL FT232HL Supported Interfaces USB to TTL / RS485 USB to TTL / RS422 USB to RS485 / RS232 USB to RS422 / RS485 USB to TTL / RS485 / RS232 USB to TTL / RS485 / RS232 / RS422 Isolation Feature Standard Non-Isolated Standard Non-Isolated Enhanced EMC Protection Enhanced EMC Protection High Galvanic Isolation High Galvanic Isolation Target Application Basic laboratory debugging Full-duplex serial testing Commercial data acquisition Multi-drop node networking High-noise industrial PLC Complex factory automation RS485 Baud Rate 300 ~ 3Mbps 300 ~ 3Mbps 300 ~ 6Mbps 300 ~ 6Mbps 300 ~ 12Mbps 300 ~ 12Mbps RS422 Baud Rate N/A 300 ~ 3Mbps N/A 300 ~ 6Mbps N/A 300 ~ 12Mbps TTL Baud Rate 300 ~ 3Mbps 300 ~ 3Mbps N/A N/A 300 ~ 12Mbps 300 ~ 12Mbps RS232 Baud Rate N/A N/A 300 ~ 460Kbps 300 ~ 460Kbps 300 ~ 460Kbps 300 ~ 460Kbps Data Bits 7, 8 7, 8 5, 6, 7, 8 5, 6, 7, 8 7, 8 7, 8 Stop Bits 1, 2 Parity Bits NONE, ODD, EVEN, MARK, SPACE Operating Temperature & Humidity -40 ~ +85°C, 5% ~ 95%RH (No Condensation) Storage Temperature & Humidity -40 ~ +105°C, 5% ~ 95%RH (No Condensation) Product Dimensions 68 × 78.3 × 18mm Download Manual Application Scenarios Industrial Automation & PLC Programming: In factory floor environments fraught with electromagnetic interference (EMI) from heavy machinery, engineers often face dropped packets during PLC debugging. The E810-U16H, utilizing advanced galvanic isolation and transient voltage suppression, breaks ground loops and ensures flawless command execution between the host PC and the industrial controller. Building Access Control Systems: Security integrators frequently struggle with signal attenuation when networking dozens of card readers across long distances. By leveraging the E810 series' robust RS485 conversion and integrated fail-safe biasing, systems can easily maintain stable polling rates across a 1200-meter multi-drop bus without data corruption. Testing and Measurement Equipment Logging: When interfacing with high-frequency sensors that require custom baud rates, standard commercial converters often fail due to clock inaccuracies. The E810 series ensures precise hardware-level timing and high-speed data throughput, allowing electrical engineers to log continuous data streams without buffer overruns. Technical FAQ Q: What are the specific logic level thresholds for the TTL interface on the E810 series? A: The TTL interface operates natively at a 3.3V logic level but is strictly 5V tolerant. A logic high is output at approximately 3.3V, while a logic low is maintained below 0.4V. This ensures safe direct interfacing with modern 3.3V MCUs like STM32 and legacy 5V logic systems without requiring external level shifting circuitry. Q: How does the RS485 interface manage bus termination and impedance matching? A: The internal transceiver circuitry features integrated transient voltage suppression and fail-safe biasing. While external 120-ohm termination resistors must be deployed by the user at the physical ends of a long transmission line to prevent signal reflection, the internal A/B line pull-up and pull-down resistors guarantee a defined logic state during bus idle periods. Q: What are the maximum power draw and voltage specifications over the USB bus? A: The device is entirely USB bus-powered, drawing a maximum of 100mA at 5V DC under continuous, heavy-load transmission. Internal LDO regulators step this down to power the core logic chips, ensuring the converter maintains absolute stability even if the host machine's USB port voltage fluctuates between 4.75V and 5.25V. Q: How is hardware isolation implemented in the 'H' models to protect host equipment? A: The high-isolation models utilize integrated magnetic or digital isolators paired with an isolated DC-DC converter. This architecture provides up to 1500V RMS galvanic isolation between the USB host and the serial transmission lines, effectively eliminating ground loops and protecting the computer's motherboard from high-voltage surges commonly found in motor drive applications.