(image for) U.S. Converters LLC
Contact
 Login
  
0

USB to RS485 Converter, 5V Output

  • Model: FCT-2101-B
  • In Stock

$29.99

Add to Cart:

This USB to RS485 Adapter is a basic USB-powered converter designed to bridge USB hosts with RS485 networks in industrial environments. This compact yet powerful device delivers reliable RS485 communication with 6 kV three-level lightning protection and robust USB port protection, making it ideal for industrial automation, sensor networks, and multi-node serial systems.
Powered directly by a USB port (no external power required), the adapter features plug-and-play compatibility with standard serial software and supports long-distance, multi-point RS485 communication.
This converter has an AUX terminal (VCC and GND) which can be used for powering a low-voltage (5V) device. The amperage depends which type of USB the converter is connected to (USB 2.0 or 3.0).

Key Features

  • 6 kV three-level lightning protection on the RS485 interface meets GB/T17626.5 (IEC61000-4-5) standards.
  • TVS protection on the USB port (±15 kV air / ±8 kV contact ESD).
  • Built-in USB surge and EFT protection for enhanced reliability.

Connectivity & Compatibility

  • Full-speed USB 2.0 interface with USB-powered operation.
  • 5VDC AUX power which can be used for powering a low power/amp device.
  • Emulates a standard serial port (no special drivers for many applications).
  • Compatible with Windows, Linux, macOS, Android, and legacy environments.
  • Equipped with a structured industrial USB cable (1.5 m).

Performance & Status Indicators

  • Supports communication baud rates from 300 to 921600bps
  • Compatible with shielded twisted-pair cabling — up to 3 000 m communication distance at 4 800 bps.
  • Three LED indicators — Power (red), RS485 Receive (orange), RS485 Transmit (green) — for at-a-glance status monitoring.

Typical Applications

  • Industrial automation systems
  • PLC / HMI communication links
  • Sensor and control networks
  • Multi-node RS485 networks
  • Legacy device integration

Resources

 

SPECIFICATIONS
Part number FCT-2101-B
Operating system Windows 11/10/8.1/8/7/VISTA/XP/2000/98, Server 2022/2019/2016/2012/2008/2003 -32/64bit, Microsoft WHQL/HCK Certified
Processor CH340
Power 5VDC provided by USB port
Serial interface RS485 2-wirre half-duplex, screw terminals, A, B, signal GND, GND and VCC
Compatible with Modbus RTU/ASCII, BACnet
Bias resistors Yes
USB interface Standard Type B Female. Static protection ±15kV(air), ±8kV(contact), EFT protection 40A(5/50ns), surge 5A(8/20us). 200mA self-recovery fuse (USB)
Indication LEDs Power, Send and Receive
Baud rate 300 to 921600bps
Parity None, Odd, Even, Mark, Space
Data Bits 5, 6, 7, 8
Stop Bits 1, 1.5, 2
Flow Control Hardware automatic control
COM port accessible by Included virtual COM port drivers
Isolation RS485 port: GB/T17626.5(IEC61000-4-5), 10/700μs short circuit, 6KV open circuit peak output voltage
Electrostatic (ESD) protection 15KV/ 600W/ms high voltage protection
Current draw Static: less than 80mA. Dynamic average: less than 30mA
Dimensions 75 × 47 × 20.5 mm
Cable length 1.5m
Interface compliance USB1.1,2.0,3.0, EIA/TIA RS-232
Regulatory compliance FCC, CE and RoHS
Operating temp -40C to +85C
Warranty 1 year limited warranty