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Green rectangular PCIe card with four DB9 ports and two brackets

STARTECH

STARTECH quad-port serial PCIe card computer accessory

SKU CH-27C3-EFXWF GTIN 065030903141

Adds four independently configurable serial ports supporting RS-232, RS-422 and RS-485 with selectable 12V or 5V power per port

  • TypeType
  • Four independent serial ports operate in RS-232 RS-422 RS-485 modes
  • Each port configurable for 12V 1.5A 5V 1.5A or no power via SATA
  • LED indicators show transmit receive status for quick monitoring
  • Standard and low-profile brackets included for desktop or SFF builds
  • TAA compliant for government and regulated deployments

Four DB9 serial ports

The StarTech 065030903141 adds four independent DB9 ports to a desktop or small form factor system through a single PCI Express slot. Each port operates in RS-232 RS-422 or RS-485 mode and is configured with on-board DIP switches. LED indicators show transmit and receive activity for every port. The card includes both standard and low-profile brackets for flexible installation.

Replaces single-port or fixed-mode cards

This adapter suits builders who need multiple serial interfaces without occupying several expansion slots. It upgrades older single-port cards by providing four channels that can each run a different protocol. The jump is worthwhile when connecting mixed RS-232 RS-422 and RS-485 equipment simultaneously. It does not suit systems that lack a free PCI Express slot or that require USB-based serial connectivity.

Configurable 12V or 5V power per port

An auxiliary SATA power connector lets each port deliver 12V at 1.5A or 5V at 1.5A on pin 9, or operate with no power (RI) via jumpers. This headroom supports powered sensors, PLCs, point-of-sale terminals, medical devices and scientific instruments. The card runs out when the host cannot supply sufficient auxiliary power or when more than four serial channels are required.

Highlights

  • Four independent serial ports operate in RS-232 RS-422 RS-485 modes
  • Each port configurable for 12V 1.5A 5V 1.5A or no power via SATA
  • LED indicators show transmit receive status for quick monitoring
  • Standard and low-profile brackets included for desktop or SFF builds
  • TAA compliant for government and regulated deployments

Specifications

TypeType
Shipping weight0.24 kg
Package size211 × 145 × 38 mm

Questions about this item

Does the card fit in a low-profile case?

The StarTech 065030903141 ships with two standard-profile brackets pre-installed and includes four low-profile brackets for small form factor systems.

How do I set each port to RS-232 RS-422 or RS-485?

Use the on-board DIP switches to select the protocol for each DB9 port independently.

What power does the auxiliary SATA connector provide?

It supplies 12V at 1.5A per port or 5V at 1.5A per port, selectable per port via jumpers; pin 9 can also be left unpowered (RI).

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