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Green PCIe card with two DB9 male ports and metal bracket

UOTEK

UOTEK UT-792 PCIe 2-Port RS485/RS422 Serial Card

SKU CH-HJ2J-AH184

Adds two DB9 serial ports with RS-422/485 signalling, 921.6 kbps speed, 1.2 km reach and ±15 kV ESD protection over a PCI-Express x1 slot

  • Interface typePCI-Express
  • Connection typesDB9 male x 2
  • Temperature range-40 to 85 °C
  • Two serial ports add legacy device connectivity via PCI Express
  • Surge protection up to 600W and ±15KV ESD guards industrial equipment
  • Wide operating range from -40°C to 85°C suits harsh environments
  • Long-distance RS-422/485 transmission reaches 1.2Km reliably
  • Broad OS support covers Windows, Linux, VxWorks and legacy systems

Industrial serial expansion

The UOTEK UT-792 adds two DB9 male ports to a PCI-Express slot. Each port operates under RS-422 or RS-485 signalling with selectable baud rates from 300 to 921.6K bps. Built-in optoelectronic isolation and TVS surge protection rated at 600W per line guard the host system against transients.

Factory automation and legacy integration

Engineers maintaining SCADA, PLC or metering networks gain a low-profile path to modern motherboards. The card supports Windows from NT 4.0 through 10, plus Linux 2.4 and 2.6 kernels, VxWorks and WinCE. Sites needing USB, Ethernet or more than two serial channels should evaluate alternative form factors.

Sustained industrial throughput

Surge clamping and ±15 kV ESD defence operate continuously across the -40 to 85 °C range. Hardware flow control with RTS/CTS and XON/XOFF prevents buffer overrun during long 1.2 km cable runs. The x1 2.5 Gbps PCIe link maintains deterministic latency without thermal throttling.

How it compares

Measured against everything we stock in Ethernet Cards & NICs, at today’s prices. Recalculated every night.

Price $43.99
Cheaper than about 71% of the 1,505 comparable items (median $90.99).

Specifications

Product
Brand nameUOTEK
Model nameUT-792
Ports & slots
Interface typePCI-Express
Connection typesDB9 male x 2
Environment & compliance
Temperature range-40 to 85 °C

Questions about this item

Does the UT-792 require a free PCI-Express x1 slot on my motherboard to install?

Yes, the card uses a PCI-Express x1 interface running at 2.5 Gbps, so an available x1 or larger slot is needed.

Will the UT-792's RS-422/485 signals interfere with older RS-422 devices on the same bus?

Each port provides 600 W surge protection and ±15 kV ESD protection, isolating the card from transients that could affect legacy equipment.

How can I verify the UT-792 is communicating at the correct 921.6 Kbps after driver installation?

Check the port settings in Device Manager or your terminal software; the baud rate should match the configured 921.6 Kbps with the chosen data, stop and parity bits.

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