PCI 2-Port RS-422, RS-485 Serial Interface

Part: 7204   Model: Ultra-COMM 2.422

(1 customer review)

Interface Accessories


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The 7204 PCI serial interface provides two serial ports, each individually configurable for RS-422 or RS-485. The board is capable of data rates to 460.8K bps and automatically handles RS-485 transmitter enable/disable. The 7204 utilizes 16C850 UARTs that provide 128-byte Tx/Rx FIFOs. Ordering options allow the choice of UARTs with support for custom baud rates and 9-bit protocols.

Sealevel’s SeaCOM software makes installation and operation easy using Microsoft Windows and Linux operating systems.


Additional information

Communications Chip


Electrical Interface

RS-422, RS-485

Humidity Range

10 – 90% Relative Humidity, Non-Condensing

Host Interface(s)


Max Data Distance

4000 feet

Max Data Rate

460.8K bps

Operating Temperature

0°C to 70°C (32°F to 158°F)

PC Bracket

Standard Height

# of Ports


RoHS Compliant


Serial Connector(s)


Storage Temperature

-50°C to 105°C (-58°F to 221°F)

UART Series

850 UART

  • Compliant with RoHS and WEEE directives
  • Each port individually configurable for RS-422 or RS-485
  • 16C850 buffered UARTs with 128-byte FIFOs
  • Data rates to 460.8K bps
  • Automatic RS-485 enable/disable
  • Two DB-9M connectors

Windows Software

Software: SeaCOM - Windows

Linux Software

Software: SeaCOM - Linux


Datasheet: 7204


Manual: 7204

1 review for Ultra-COMM 2.422

  1. Will

    7204: Great reliable product
    Happened to find the User Manual for our pair of 7204 Ultra 485+2.PCI units and thought would provide a little feedback. We purchased these in 2005 for use in our product testing. One configured for RS422 and the other for RS485 and both used at data rates from 9,600 to 115,200bps. They are used nearly daily and have been so reliable that they are our standard.

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