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StarTech dual-port PCIe serial card with two DB9 ports and low-profile brackets

STARTECH

STARTECH Dual-Port PCIe Serial Card 2S232422485 232/422/485 DB9 16C1050 Low Profile

SKU CH-G1T5-TKD9R

Adds two serial ports supporting RS232, RS422 and RS485 with 16C1050 UART and Level-4 ESD protection

  • Product typePCI Express to Serial Port Card
  • Dual serial ports add legacy RS232/RS422/RS485 connectivity to modern PCIe slots
  • Low-profile brackets included fit both standard and slim chassis without extra hardware
  • 16C1050 UART with 16-byte FIFO buffers reduces CPU overhead during high-speed serial transfers
  • Level-4 ESD protection safeguards the card and connected equipment from electrostatic discharge damage
  • TAA compliance meets government procurement requirements for federal and institutional deployments

Dual-Port PCIe Serial Card

This StarTech add-on card provides two DB9 serial ports over a PCI Express slot. It supports RS232, RS422 and RS485 protocols using a 16C1050 UART. Low-profile brackets are included for compact chassis installations. The card is TAA compliant and features Level-4 ESD protection.

Upgrade from Legacy Serial Interfaces

The card replaces older PCI or ISA serial boards and onboard headers that lack RS422 or RS485 capability. It is worth installing when industrial, point-of-sale or automation equipment requires those signalling standards. The PCIe interface ensures compatibility with current motherboard slots.

Suited for Industrial and Legacy Connectivity

This card suits technicians and integrators connecting modems, PLCs, barcode scanners or CNC machinery via DB9 cables. It is not for users who need more than two ports or require USB or Ethernet-based serial conversion instead.

How it compares

Measured against everything we stock in PCIe Expansion Cards, at today’s prices. Recalculated every night.

Price $77.99
Pricier than about 81% of the 891 comparable items (median $30.99).

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Specifications

Product
Brand nameStarTech
Product typePCI Express to Serial Port Card

Questions about this item

Will the 2 x Low-Profile Bracket fit my slimline chassis?

The card ships with two low-profile brackets and a ribbon cable so it can be mounted in a half-height or full-height PCIe slot without a standard bracket.

Which jumper or switch sets RS232, RS422 or RS485 on the 16C1050 UART?

Each port uses on-board jumpers to select 232, 422 or 485 mode; the common mistake is leaving all jumpers in the default position instead of matching the connected device.

How often should I check the Level-4 ESD protection on the DB9 ports?

The ESD protection is a permanent circuit feature and does not degrade under normal use; no scheduled inspection or replacement is required.

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