USB to 8-port RS-232 Converter

  • Supports bilateral switching of data between 1 USB interface and 8 RS-232 serial ports
  • Low CPU utilization during usage, stable performance
  • Autotunning of serial port signal rate, baud rate of serial port 300bps~115200bps
  • Serial port supports 15kV electrostatic protection, 1.5kV isolation protection
  • Supports 9VDC power supply input
  • Supports -40~75℃ wide temperature operation


USB8232I is a USB to RS-232 isolated interface converter, which can achieve bilateral switching of data between USB interface and 8 RS-232 serial ports. The product supports 1 USB interface and 8 RS-232 serial ports. Serial port is equipped with 15kV electrostatic protection and 1.5kV isolation protection, which can effectively protect the device from damage. It adopts desktop mounting to meet the requirements of different application fields.

The product provides matched driver program software; USB interface connected to PC will make up a serial COM port in the computer system. PC host can simultaneously communicate with 8 RS-232 serial devices via virtual COM port.

Hardware adopts fanless, low power consumption, wide temperature design and has passed rigorous industrial standard tests, which can suit for the industrial scene environment with harsh requirements for EMC. It can be widely used in PLC, Industrial Automatic Control, IC Card Toll Collection System, and Data Acquisition Control System, etc.

Serial Port  

Standard: EIA RS-232C

Quantity of serial port: 8 RS-232 serial ports

RS-232 signal: DCD, RXD, TXD, DTR, GND, DSR, RST, CTS, RI

Baud rate: 300bps~115200bps

Data bit: 7bit, 8bit

Stop bit: 1bit, 2bit

Parity bit: None, Even, Odd, Space, Mark

Interface form: DB9, Male

Transmission distance: 15m

Interface protection: 15kV electrostatic protection, 1.5kV isolation protection



USB Port



Standard: USB 1.1, USB 2.0

Quantity of interfaces: 1 USB interface

USB signal: VCC, DATA+, DATA-, GND

Transmission rate: high speed 480Mbps, full speed 12Mbps

Interface form: USB B-type socket, Female

Transmission distance: 5m


Operating System  

Windows 2000/XP/Server 2003/Server 2008/Vista, Windows XP embedded, Windows CE 4.2/5.0/5.2/6.0, Linux (above version 2.4), MAC OS-X


LED Indicator  

Power supply indicator, serial port data sending/receiving indicator







9VDC, adopts DC round head





No-load: 2.86W@9VDC

Full-load: 2.88W@9VDC





Operating temperature: -40~75℃

Storage temperature: -40~85℃

Relative humidity: 5%~95% (no condensation)





Housing: metal, IP30 protection grade

Installation: desktop mounting

Dimension (W x H x D): 230mm×40mm×148mm

Weight: 1kg





Industrial Standards  

IEC 61000-4-2 (ESD, Electrostatic discharge), Level 4

Air discharge: ±15kV

Contact discharge: ±8kV


Shock: IEC 60068-2-27

Free fall: IEC 60068-2-32

Vibration: IEC 60068-2-6



3 years


Available Models USB RS-232 Power Supply
USB8232I 1 8 9VDC