• GBP
  • USD
  • EUR

Shopping Cart

0 items


  • Code:
  • Weight:
    0.200 Kgs




Add to wishlist


Document Type Revision File
Manual 1.2

USB to Serial Converters Manual

Product Change Notice 1.0 PCN ES-U-2001 to ES-U-2001B



Download FTDI Virtual COM Port (VCP) Drivers for Windows, Mac OS and Linux


The ES-U-2001B converter is housed in a strong plastic enclosure - it is designed for more rugged application areas than the cable types. ES-U-2001B adds a Windows serial Com port via it's USB connection and is compatible with new & legacy RS422 / RS485 devices. USB Plug and Play allows easy serial port expansion and requires no IRQ, DMA, or I/O port resources.


ES-U-2001B features a full set of RS422 / RS485 data and control signals (TX-, TX+, RX+, RX-, GND, RTS-, RTS+, CTS+, CTS-) on it's DB9 male connector. ES-U-2001B has an internal 128 byte transmit buffer FIFO and a 384 byte receive buffer FIFO. It supports data transfer rates of up to 1 Mbps. No external power supply is required as ES-U-2001 takes it's power from the USB bus.


ES-U-2001B comes with compatible drivers for all current Windows, Mac and Linux operating systems. The ES-U-2001B is a revision of the popular ES-U-2001. Please see the datasheet for the differences between these two products.



  • Adds one RS422 or RS485 serial port by connecting to USB
  • Installs as standard Windows COM port
  • RS422 data signals: Tx-, Tx+, Rx+, Rx-,GND, RTS-, RTS+, CTS+, CTS-
  • RS485 data signals:
    • 4-wire: Tx-, Tx+, Rx+, Rx-
    • 2-wire: data-, data+
  • FIFO: 128 byte transmit buffer 384 byte receive buffer
  • Serial port speed up to 1 Mbps
  • One DB9 male connector
  • Full hardware and software flow control
  • Automatic transmit buffer control for 2-wire RS485 half-duplex operation
  • ESD surge protection (15KV)
  • Monitor LEDs of TxD, RxD indicating power & port status
  • Serial Communication Parameters:
    • Parity: None, Even, Odd
    • Data bits: 7, 8
    • Flow control: RTS/CTS , X-ON/ X-OFF, None
  • Built-in 120 Ohm termination resistors for Tx/ Rx/ CTS termination
  • USB cable of 0.9 meter included
  • Powered by USB port; No external power adapter required.
  • Easy plug & play installation and RS422 / RS485 device connection
  • Industry Standard FTDI chip set & drivers for maximum compatibility
  • COM Port Number assignment is configurable



PCN_ES_001 ES-U-2001 [PDF, 143.47 KB]
USB to Serial Converters Manual[2] [PDF, 1.14 MB]