2213 product photo showing DB9M serial connectors and SeaLATCH locking USB connector.
2213 product photo showing DB9M serial connectors and SeaLATCH locking USB connector.

Part# 2213


USB to 2-Port Isolated RS-232, RS-422, RS-485 DB9 Serial Interface Adapter


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The SeaLINK® 2213 USB to isolated serial interface adapter offers an easy way to connect two serial devices to a USB port. Each DB9M serial port is individually configurable for RS-232, RS-422, or RS-485 via dip switches accessible through the case. There is never a need to open the enclosure, simplifying field installation and service. Optical isolation helps prevent damage caused by surges and ground loops commonly found in industrial environments. Status LEDs on each serial port display transmit and receive activity, and data rates to 921.6K bps are supported.

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 2213 serial adapter to your USB port. The device is immediately recognized by the host system with both serial ports appearing as standard COM ports, enabling compatibility with legacy software. The 2213 is USB bus powered, eliminating the need for an external power supply.

The 2213 integrates Sealevel's SeaLATCH locking USB port, which is fully compatible with standard USB cables. When used with the included USB cable with a SeaLATCH USB type B connector, the metal thumbscrew provides a secure connection to the device and prevents accidental cable disconnection.

Ready for DIN rail mounting, the 2213 includes a removable plastic clip that snaps onto 35mm DIN rail. The clip can also be attached to a wall, under a counter, or inside a panel with optional screws.

Do you know that adapter design can impact your application? Find out how in this USB Serial performance report.
Host Interface USB
# of Ports 2
Brand/Family SeaLINK
Electrical Interface RS-232, RS-422, RS-485
Optically Isolated Yes
USB Powered Yes
SeaLATCH Locking USB Yes
RoHS Yes
Serial Connector(s) DB9M
Communications Chip USB/UART
Max Data Rate 921.6K bps
Max Data Distance 50 feet (RS-232)
4000 feet (RS-485)
Power Requirement +5V @ 300mA
USB Specification 1.1 Compliant
2.0 Compatible
Operating Temperature 0 - +70C
Storage Temperature -50 - +105C
Humidity Range 10 - 90% Relative Humidity, Non-Condensing
Dimensions 4.5 (L) x 3.5 (W) x 1.3 (H)
  • • Compliant with RoHS and WEEE directives
  • • Each port individually configurable for RS-232, RS-422, or RS-485
  • • High speed UART with 128-byte Tx FIFO and 384-byte Rx FIFO
  • • Optical isolation provides up to 2,000V AC protection against surges and ground loops
  • • Supports data rates to 921.6K bps
  • • Automatic RS-485 enable/disable
  • • Sealevel's SeaLATCH locking USB port provides secure connection with SeaLATCH USB cables via metal thumbscrews
  • • Status LEDs display serial transmit and receive activity
  • • Powered by USB connection
  • • DB9M connectors
  • • Sealevel software supports Windows and Linux operating systems
  • • Includes 6' USB type A to SeaLATCH USB type B device cable (Item# CA356)

Terminal Block
Terminal Block


Isolated 7-Port USB Hub
Isolated 7-Port USB Hub


USB Device Cable
USB Device Cable


DB9F to Opto 22 DB9F
DB9F to Opto 22 DB9F


RS-422 to RS-530 Cable
RS-422 to RS-530 Cable


Terminal Block Kit
Terminal Block Kit


Terminal Block
Terminal Block


Terminal Block Kit
Terminal Block Kit


SeaLATCH Locking USB Device Cable
SeaLATCH Locking USB Device Cable


Proudly Made in the USA
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