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Green PCI card with silver bracket and one DR44 port

UOTEK

UOTEK UT-764 PCI 4-port RS232 serial card DR44

SKU CH-8VXD-R6MQ7

Adds four RS-232 serial ports via a single PCI slot with DB9 breakout and industrial temperature tolerance

  • Connectors1 DR44 Female
  • InterfacePCI
  • Temperature-40~85°C
  • Connects four RS-232 devices via one DR44 female connector
  • Operates reliably from -40 to 85 °C industrial range
  • Fits 32-bit universal PCI slots at 3.3 V or 5 V
  • Supports Windows 2000 through 8.1, NT 4.0, CE, VxWorks and Linux 2.4/2.6
  • Each port reaches 921.6 kbps with RTS/CTS and XON/XOFF flow control

Industrial four-port RS-232 adapter

The UOTEK UT-764 installs in a universal 32-bit PCI slot and breaks out one DR44 female connector into four independent RS-232 ports. Each port carries the full modem-control signal set including DCD, DTR, DSR, RTS, CTS and RI. The card targets POS terminals, ATMs, industrial automation systems and integrated equipment that still rely on legacy serial links. It operates across a wide temperature range from -40 to 85 °C.

Replaces single-port or USB serial links

Moving from a single onboard port or a USB-to-serial converter to this four-port card removes the need for multiple adapters and eliminates USB bandwidth contention. The jump is worth it when an application must talk to several modems, printers, scanners or PLCs simultaneously and requires deterministic timing. The board supports both 3.3 V and 5 V PCI signalling so it fits older servers as well as newer PCs without a slot change.

Sustained 921.6 kbps per port under load

Each port can maintain a continuous 921.6 kbps data rate with configurable data bits of 5, 6, 7 or 8, stop bits of 1, 1.5 or 2 and parity options of none, even, odd, space or mark. Hardware RTS/CTS and software XON/XOFF flow control prevent buffer overruns during long transfers. The industrial temperature rating and ESD protection keep the link stable in harsh environments where consumer-grade cards would throttle or fail.

Highlights

  • Connects four RS-232 devices via one DR44 female connector
  • Operates reliably from -40 to 85 °C industrial range
  • Fits 32-bit universal PCI slots at 3.3 V or 5 V
  • Supports Windows 2000 through 8.1, NT 4.0, CE, VxWorks and Linux 2.4/2.6
  • Each port reaches 921.6 kbps with RTS/CTS and XON/XOFF flow control

Specifications

BrandUOTEK
ModelUT-764
Connectors1 DR44 Female
InterfacePCI
Temperature-40~85°C

Questions about this item

What bracket slot width does the UT-764 card need in a chassis?

The card fits a standard 32-bit universal PCI slot, which uses a typical full-height bracket opening.

Which driver step is often missed when installing the UT-764 on Windows?

After seating the card, install the vendor driver before connecting any DB9 cables so each of the four ports enumerates with the correct COM numbers.

What component on the UT-764 may need replacement after prolonged industrial use?

The on-board ESD protection devices on each RS-232 line can degrade after repeated surge events and should be inspected if ports become unreliable.

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