We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Green PCB half-height PCIe card with single DR44 connector and metal bracket

UOTEK

UOTEK UT-794 4-port PCI-Express serial card

SKU CH-YN2T-6BYQ4

Adds four isolated RS-422/485 serial ports via a PCIe x1 2.5 Gbps slot with 1.2 km range and -40 to 85 °C operation

  • ConnectorsDR44
  • InterfacePCI-Express
  • Temperature-40~85°C
  • Adds four serial ports via a single PCI-Express lane
  • Surge and ESD protection on every RS-422/485 line
  • Operates reliably from -40 °C to 85 °C
  • Extends RS-422/485 links up to 1.2 km
  • Compatible with Windows, Linux, VxWorks and legacy OS

Industrial serial expansion

The UOTEK UT-794 adds four RS-422/485 ports to a PC through a single PCI-Express x1 slot. It is built for industrial automation, data-acquisition and legacy-equipment integration where balanced differential signalling is required.

DB44 breakout connector

The card presents one DR44 connector that carries all four ports; a separate breakout cable splits the signals into individual DB9 ports. This single-connector design determines whether the card fits your existing cabling and panel layout.

Sustained industrial operation

The board operates continuously from -40 °C to 85 °C and provides 600 W surge protection plus ±15 kV ESD protection on every line. Optoelectronic isolation and TVS clamping keep the ports stable during long cable runs up to 1.2 km at 921.6 Kbps.

Highlights

  • Adds four serial ports via a single PCI-Express lane
  • Surge and ESD protection on every RS-422/485 line
  • Operates reliably from -40 °C to 85 °C
  • Extends RS-422/485 links up to 1.2 km
  • Compatible with Windows, Linux, VxWorks and legacy OS

Specifications

BrandUOTEK
ModelUT-794
ConnectorsDR44
InterfacePCI-Express
Temperature-40~85°C

Questions about this item

What does the X1 2.5Gbps PCI Express bus mean for real-world throughput?

The card uses a single-lane PCIe link rated at 2.5Gbps, so all four serial ports share that bandwidth; aggregate throughput cannot exceed the lane limit.

Which signalling standards does the DR44 connector support and what distance limit applies?

The DR44 connector carries both RS-422 and RS-485 signals, each rated for up to 1.2Km transmission distance.

What slot and bracket space does the UT-794 need to install?

It fits a standard PCI-Express x1 slot and occupies one full-height expansion bracket.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.