USB to RS-232/422/485 Converter


The I-7561 is a cost-effective module for transfer serial data over USB. It allows you to connect your serial devices to systems using a USB interface. Connecting the I-7561 to a PC, you get one or two extra high-speed RS-232/422/485 ports. Like our I-7520A, the I-7561 contains ˇ§ Self Tuner ˇ§ This chip auto-tunes the baud rate and data format to the Rs-485 network. The I-7561 module derives the power from the USB port and doesnˇ¦t need any power adapter. It also features a high-speed 115.2 Kb/s transmission rate, and supports various O.S. independent RS-232/422/485 Ports.


  • Full compatibility with USB 1.1 specifications.

  • Input: USB protocol.

  • Output: RS-232/422/485 protocol.

  • Speed: ˇ§Self Tunerˇ¨ inside

  • 3000 V DC Isolation protection provided.

  • 256 modules max. in one RS-485 network without repeater.

  • 2048 modules max. in one RS-485 network with repeater.

  • Isolation voltage: 3000V DC

  • Repeater request: 4,000 feet or over 256 modules.

  • Plug-and-play installation.

  • The I-7561 gets the power from USB port; no need external power supply

  • Windows 98/ME/2000/XP drivers supported. Driver for other operating system are currently under development


  • Compatibility: USB 1.1 standard

  • Input port : USB

  • Output port:  3-wire RS-232, RS-422,  RS-485.

  • Cable: USB type A connector (Type A to Type B cable provided).

  • RS-232 Signals: TXD, RXD ,GND

  • RS-422 Signals: RX+, RX-, TX+, TX-

  • RS-485 Signals: DATA+, DATA-

  • Isolation voltage: 3000VDC

  • Driver Supported: Windows 98/ME/2000/XP

  • ˇ§Self Tunerˇ¨ inside, support multiple Baud Rate and multiple Data Format

  • 256 modules max. in one RS-422/485 network without repeater

  • Isolation voltage: 3000VDC

  • Repeater request: 4,000 feet or over 256 modules

  • Communication distance:

    2.1Km/9600 Bps

    2.7Km/4800 Bps

    3.6Km/2400 Bps

  • Mounting: Din-rail, wall mounting, piggyback stack

  • Power consumption: 1.5 W max.

  • Operating temperature: -25˘J to +75˘J

  • Storage temperature: -25˘J to +80˘J

  • Humidity: 5~ 95%

  • Dimensions: 123 mm x 72 mm x 33 mm

  • Driver Supported: Windows 98/ME/2000/XP


Ordering Information


one port Isolated USB to RS-232/RS-422/485 converter