Industrial USB to 2-Port RS485 Converter (3KV isolation/6KV lightning protection)

The device features basic functions of USB to 2-channel 3KV isolation/6KV lightning protection high-speed RS485 conversion. The product is powered by a USB port and does not require an external power supply. It utilizes a unique zero-delay automatic transmit/receive conversion technology, making it plug-and-play compatible with all software. It also has transmit/receive enable control and enters a high-impedance state when not sending data, supporting multi-point communication.

Distinguishing itself from other similar inexpensive products in the market, this product offers the following features:

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

● 3KV isolation (can withstand AC ~ 380V without damaging the USB port) and 6KV lightning protection (10/700us current wave, internal resistance of 40Ω) for the serial ports 

● Built-in TVS protection for the gold-plated USB interface (±15kV in the air, ±8kV on contact)

● Equipped with 5 LED lights: red for power, orange for receiving on the two serial ports, and green for transmitting on the two serial ports.

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

● It emulates standard serial ports for upgrading existing peripheral devices or adding additional serial ports via USB.

● It is fully compatible with serial port applications on Windows operating systems, requiring no modifications.

● The hardware has fully integrated transmit/receive buffers, and the 2-channel RS485 interfaces support communication baud rates ranging from 1200bps to 10Mbps.

● It is suitable for operating systems such as Win98/2K/XP, WIN10/WIN11 32/64-bit systems.

● The communication cables should be made of shielded twisted pairs with a cross-sectional area of at least 0.5mm copper wire. The maximum communication distances are 3000 meters (4800bps), 2000 meters (9600bps), and 1000 meters (115.2Kbps).

● The minimum number of networked sites is 128, and the maximum number of networked sites is determined by the RS485 input impedance of each site.

● The device is equipped with 5 LED indicators: a red light for power, an orange light for data received on the two serial ports, and a green light for data transmitted on the two serial ports, providing convenient status monitoring.

● The RS485 serial port is equipped with 3KV isolation, ensuring that when exposed to long-term high voltage of AC220V or AC380V, only the RS485 interface is affected, while the USB port and connected devices remain protected.

● The RS485 interface features three-level lightning protection, meeting the GB/T17626.5 (IEC61000-4-5) standards, with a short-circuit current wave of 10/700μs and an open-circuit peak output voltage of 6KV, and an internal resistance of 40Ω.

● Working temperature from -40℃ to +85℃.

● The device has passed 100% burn-in testing.

● Serial Interface

Standard:

  EIA/TIA-485 RS-485 (ISO/IEC8284)

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

High-speed: High-speed (25Mbps to 480Mbps)

Physical Interface: 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