USB to 1-Port RS-232 DB25 Serial Interface Adapter

Part: 2101   Model: SeaLINK+232

(1 customer review)

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The 2101 USB serial I/O product provides a single USB to RS-232 serial port for providing USB connectivity to legacy or non-USB compliant devices via a DB-25 connector. SeaLINK® serial interface adapters support standard PC data rates up to 460K bps to provide you with the horsepower your serial I/O applications require.

Sealevel’s SeaCOM USB software drivers and utilities make installation and operation easy using Microsoft Windows and Linux operating systems. After installing the software, simply connect the SeaLINK serial interface adapter to your USB port and the device is immediately recognized by the system as a standard serial port.

Do you know that adapter design can impact your application? Find out how in this USB Serial performance report.

The 2101 has a DB-25M connector. If you need a DB-9M connector, order the 2105R.


Additional information



Operating Temperature

0°C to 70°C (32°F to 158°F)

USB Powered


Storage Temperature

0°C to 70°C (32°F to 158°F)

Serial Connector(s)


RoHS Compliant


Power Requirement

+5V @ 50mA

# of Ports


Max Data Rate

460.8K bps

Communications Chip


Max Data Distance

50 feet

Host Interface(s)


Humidity Range

10 – 90% Relative Humidity, Non-Condensing

High Retention USB


Electrical Interface



3.8" (L) x 2.3" (W) x 1.0" (H)9.66 cm (L) x 5.84 cm (W) x 2.54 cm (H)

USB Specification

1.1 Compliant2.0 Compatible

  • Compliant with RoHS and WEEE directives
  • High-speed UART with 128-byte Tx FIFO and 384-byte Rx FIFO
  • Data rates to 460.8K bps
  • All modem control signals implemented
  • Hot-swappable
  • Powered by USB connection
  • Sealevel software supports Windows 98SE/ME/2000/XP/Vista and Linux operating systems
  • DB-25M connector
  • Includes 6′ USB device cable (Item# CA179)

Windows Software

Software: SeaCOM - Windows

Linux Software

Software: SeaCOM - Linux


Datasheet: 2101


Manual: 2101

1 review for SeaLINK+232

  1. Fx Worx

    Show Director / Pyrodigital Scripting software
    Our issue started when we moved to Windows 8, our USB to serial adapter (Rs232) would not support Windows 8, So we could not download our fireworks scripts to the firing computers. Brian at Sealevel suggested there Sea Link +232 (2101). It worked flawless right out of the box!
    As our scripting stations get upgraded to Windows 8, we will be using Sealevel for all of our data transfers!

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