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Black USB-A connector with transparent housing showing LEDs, 5.0 m cable ending in six colour-coded wires

BESIGN

BESIGN USB to RS485 Cable Adapter 5.0m

SKU CH-EY4K-JHE02

A 5.0 m USB 2.0 cable converts a USB port to an RS485 serial link with TX and RX LEDs, 120 R termination resistors and 15 kV ESD protection

  • 0 m cable reaches distant industrial devices
  • TX and RX LEDs show live data traffic
  • 300 to 3 Mbaud covers legacy and modern speeds
  • FT232RQ chip emulates a standard COM port
  • 15 kV ESD protection guards the RS-485 lines

USB to RS485 Converter Cable

The BESIGN USB to RS485 cable adapter provides a USB 2.0 Full Speed serial interface for industrial and automation equipment. It suits engineers and technicians who need reliable EIA/TIA-485 communication with customised end connectors for Modbus networks. The 5.0 m length allows flexible placement between a host computer and remote devices. ||

Sustained Operation Stability

The cable operates across a -40 °C to +85 °C temperature range, maintaining signal integrity during extended sessions. ESD protection rated at 15 kV Human Body Model safeguards the RS-485 I/O lines against transient spikes. Data transfer rates from 300 baud to 3 Mbaud are supported continuously without thermal throttling. ||

Installation and Common Issues

The FT232RQ chip enables standard emulated COM port operation with VCP drivers for Windows 11, 10, 8, 7, Android, Linux and Mac OS. TX and RX LEDs in the transparent USB connector give immediate visual feedback on traffic. A frequent issue is incorrect wiring of the six-way output leads — A+ (Orange), B- (Yellow), two 120 R resistors (Green, Brown), VCC (Red) and GND (Black) — which prevents communication.

Highlights

  • 0 m cable reaches distant industrial devices
  • TX and RX LEDs show live data traffic
  • 300 to 3 Mbaud covers legacy and modern speeds
  • FT232RQ chip emulates a standard COM port
  • 15 kV ESD protection guards the RS-485 lines

Specifications

No published specifications for this item yet.

Questions about this item

Does the 5.0 m cable draw noticeable power or heat up during continuous all-day Modbus polling at 3 Mbaud?

The USB 2.0 Full Speed interface and FT232RQ chip keep power draw low, and the adapter is rated for -40 °C to +85 °C operation, so it stays cool even during sustained high-speed traffic.

What must my host already provide for the FT232RQ VCP driver to create a virtual COM port on Windows 10 or 11?

A standard USB-A port and an internet connection so Windows Update can fetch the signed FTDI driver; no external power supply or proprietary dongle is required.

Will the 120 Ω resistors on the green and brown wires conflict with termination already present on my legacy RS-485 bus?

The cable includes two 120 Ω resistors (green and brown leads); if your existing bus already has end-point termination, leave those leads unconnected to avoid double termination.

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