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Green PCI-Express card with one DR44 female connector and a low-profile bracket

UOTEK

UOTEK UT-784 4-Port RS-232 PCI-E Network Card

SKU CH-C8TW-7J07C

Adds four RS-232 serial ports via a single PCI-Express slot, each running up to 921.6 kbps with 256-byte FIFO and hardware flow control for industrial POS and ATM use

  • Interface typePCI-Express
  • Connection typesDR44
  • Temperature range-40 to 85 °C
  • Four RS-232 ports via one DR44 connector
  • PCI-Express x1 interface at 2.5 Gbps bus speed
  • Data rates from 300 bps to 921.6 kbps per port
  • 256-byte FIFO with hardware and software flow control
  • Industrial operating range from -40 °C to 85 °C

UOTEK UT-784 Quad RS-232 PCIe Card

The UOTEK UT-784 adds four RS-232 serial ports through a single PCI-Express x1 slot. It is built for industrial automation, POS terminals and ATM systems that still rely on legacy serial equipment such as modems, printers or scanners. Each port delivers full modem control signals including DCD, DTR, DSR, RTS, CTS and RI. The card operates across a wide temperature range of -40 to 85°C.

Industrial-Grade Thermals and Silent Operation

With no moving parts the adapter runs completely silent in normal use. The wide operating window of -40 to 85°C means it tolerates harsh cabinet environments without active cooling. Power is drawn directly from the PCI-Express bus at 2.5 Gbps lane speed, keeping cabling simple. Built-in hardware and software flow control offloads the host CPU during routine data transfers.

Sustained Load Behaviour with 256-Byte FIFO

Under continuous traffic each port sustains up to 921.6 kbps thanks to a 256-byte FIFO buffer that prevents overruns. Configurable data bits of 5 to 8, stop bits of 1, 1.5 or 2, and parity options of none, even, odd, space or mark let the card match legacy device requirements exactly. Driver support spans Windows 2000 through 10, Linux 2.4 and 2.6 kernels, VxWorks and legacy CE editions.

How it compares

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

Price $51.99
Cheaper than about 66% of the 1,505 comparable items (median $90.99).

Specifications

Product
Brand nameUOTEK
Model nameUT-784
Ports & slots
Interface typePCI-Express
Connection typesDR44
Environment & compliance
Temperature range-40 to 85 °C

Questions about this item

How do I install the UT-784 into a PCI-Express slot and connect the four RS-232 ports?

Insert the card into an available x1 PCI-Express slot, secure the bracket, then attach the single DR44 female connector; the supplied breakout cable splits this into four DB9 ports for your serial devices.

What maintenance will the UT-784 require after installation?

No routine maintenance is needed; the card has no moving parts or batteries, so only check that the DR44 cable screws stay tight and that dust does not block airflow around the bracket.

At what temperature does the UT-784 reach its operating limit during sustained use?

The card is rated for continuous operation up to 85 °C; beyond this the industrial-grade components may throttle or become unstable.

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