USB 2 to Industrial 4-Port RS232-422-485 Serial TB Adapter

Our series of Industrial USB 2.0 to terminal block serial adapters support RS-232, RS-422, and RS485 and are designed with the user in mind, the adapter is with DIP switch control for each individual port connection to suit your applications.
  • Supports 15KV ESD protection and 600W surge protection for all serial signals
  • Uses FTDI FT4232H USB 2.0 to quad UART chip
  • Incorporates DIP switch control over each individual port.
  • Per port protection from ESD and Surge Protection.
Availability: In stock

4 ESD and 600W surge protected terminal block ports

The USB2-4COMi-TB USB to quad port industrial serial adapter is designed to make RS-422 and RS-485 serial port expansion quick and simple through its terminal block connection. Controlled by DIP switches, each terminal block serial port can be individually designated for the signal your application demands. The USB 2.0 to 4 port serial adapter supports 15KV ESD protection and 600W surge protection for all serial signals.

By connecting to the USB port on your computer or available USB hub, the USB to industrial serial adapter instantly adds four RS-232/422/485 interface serial communication ports to your system while taking advantage of both the Plug-and-Play, and Hot-Plug features of the USB bus.

The USB2-4COMi-TB industrial serial adapter makes it very easy to add 4 industrial communication ports to your system though its terminal block connection and controlled by DIP switch controls located within the metal chassis of the adapter.


  • Supports USB 1.1 and USB 2.0 transfer speeds from 1.5 up to 480 Mbps, automatic link and speed detection.
  • Adds four high-speed RS-232/422/485 serial ports via USB connection.
  • 2K byte receive buffer.
  • 2K byte transmit buffer for high speed data throughput.
  • Requires no IRQ, DMA, I/O port.
  • Data rates: 300 bps to 921.6K bps.
  • Each serial port supports 5-pin screw-lock-type terminal block connector.
  • Auto-transmit buffer control for 2-wire RS-485 half-duplex operation.
  • Biasing and Termination resistors installed on-board.
  • Supports RS-232 3-wire signals: RxD, TxD, GND
  • Supports RS-422, RS-485 4-wire signals: TxD-, TxD+, RxD+, RxD-
  • Supports RS-485 2-wire signals: data-, data+
  • Monitor LEDS of TxD, RxD indicating port status
  • AC to DC-12V, 1A switching power supply included
  • Supports 15KV ESD protection and 600W surge protection
  • Virtual COM port drivers available for Windows 10, 8.1, 8, 7, Vista, 2003, 2000
  • Industrial grade metal case with DIN-rail ears for Din-rail mounting.
  • Chipset: FTDI FT4232H USB 2.0 to quad UART chip
  • Dimensions: 192.42 x 122.22 x 23.60 mm (L×W×H), dimensions are to DIN rail(W), to power plug(L)

Package Contents

  • USB2-4COMi-TB serial adapter
  • Power adapter
  • USB cable
More Information
UPC 736983902436
Color Black
Cable Length 6 feet
Connector(s) Terminals
Warranty One Year
Tech Notes Serial signals RS-232, RS-422, RS-485 are all controlled individually through DIP switches, termination and biasing is also DIP switch controlled, all DIP switches are located under the secure metal plate on the bottom of the chassis.
Compatibility , ,
Material Metal
External Interface USB 2.0
USB Speeds (Mbps) High Speed (480)
Serial Chip FTDI