USB to RS485 Converter (6KV lightning protection)

The device is designed to provide USB to RS485 conversion with a function of 6KV lightning protection. It is powered by a USB port, eliminating the need for an external power supply. It features a unique and instantaneous automatic transmission and reception conversion technology, ensuring plug-and-play compatibility with all software applications. It incorporates a transmit/receive enable control, where the output remains in a high-impedance state during standby mode without data transmission, and supports multi-point communication.

Distinguishing itself from other similar low-cost products available in the market, the device offers the following notable features:

● Industrial-grade operating temperature range (-40℃ ~ +85℃)

● RS485 serial port with 6KV three-level lightning protection (10/700us current waveform, internal resistance of 40Ω)

● Gold USB interface with built-in TVS protection (±15kV air discharge and ±8kV contact discharge)

● 3 LED indicators: Power (red), Serial Receive (orange), Serial Transmit (green)

● The device provides a full-speed USB device interface, compatible with USB v2.0.

● It emulates a standard serial port, allowing for the upgrade of existing peripheral devices or the addition of extra serial ports via USB.

● It ensures complete compatibility with serial port applications on Windows operating systems, without the need for any modifications.

● It incorporates hardware with fully integrated transmit and receive buffers, supporting communication baud rates ranging from 50bps to 2Mbps.

● It is compatible with operating systems such as Win98/2K/XP, WIN10/WIN11 (32/64-bit), Linux, MAC OS-9/X, and Android.

● It utilizes shielded twisted pair cables with a minimum cross-sectional area of 0.5mm copper, allowing for communication distances of up to 3000 meters (4800bps), 2000 meters (9600bps), or 1000 meters (115.2Kbps).

● It supports a minimum of 128 network nodes, with the maximum number of nodes determined by the RS485 input impedance of each station.

● It features three LED indicators: Power (red), Serial Data Receive (orange), and Serial Data Transmit (green), providing convenient status monitoring.

● It has a gold-plated USB port and is powered via USB, with a working current of less than 30mA. The USB interface offers protection against electrostatic discharge of up to ±15kV (air) and ±8kV (contact), as well as EFT protection of up to 40A (5/50ns) and lightning protection of up to 5A (8/20us).

● The RS485 interface is equipped with three-level lightning protection, meeting the GB/T17626.5 (IEC61000-4-5) standard. It can withstand a short-circuit current waveform of 10/700μs and an open-circuit peak output voltage of 6KV, with an internal resistance of 40Ω (instantaneous protection power >900,000W).

● The device also includes a 5V power output terminal (with 0.5A PTC protection) that activates to protect the device when operating above 0.7A.

● Operating temperature range of -40℃ to +85℃.

● It has passed 100% burn-in testing.

● Serial Interface

Standard: EIA/TIA-485 RS-485 (ISO/IEC 8284)

Serial Port Interface:

RS-485: A+, B-, GND

Physical Interface: 5-pin 3.81mm pitch screw terminal

● USB 2.0 Interface

Standard: USB 2.0

Full-speed: 500Kbps to 12Mbps

Physical Interface: Gold-plated USB Type A male connector

● Environmental Index

Operating Temperature: -40°C to +85°C

Storage Temperature: -40°C to +85°C

Operating Humidity: 0% to 95% (non-condensing)

MTBF: >100,000 hours