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Green PCIe x1 card with two DB9 ports and low-profile bracket

Syba

Syba SD-PEX15022 PCIe 2-Port DB9 RS232 Expansion Card

SKU CH-WZ9J-8R320 MPN SD-PEX15022

Adds two DB9 serial ports via a single-lane PCI Express slot with a low-profile bracket option

  • External connectors2 x Serial Ports
  • Supported operating systemsSupports Windows 2000, XP 32/64-bit, Server 2003 32/64-bit,
  • Product typePCI Express to Serial Port Card
  • Key featuresPCI-Express RS232 2x Serial Port with MSC9901 Chipset Fully
  • Product weight0.35
  • Adds two serial ports for legacy devices
  • PCIe x1 interface delivers 2.5Gbps throughput
  • MSC9901 chipset enables 250Kbps per port
  • Low-profile bracket fits compact chassis builds
  • Supports Windows 2000 through Server 2008 64-bit

PCIe x1 RS232 serial card

The Syba SD-PEX15022 adds two DB9 serial ports through a single PCI Express x1 slot using the MOSCHIP 9901 controller. It is fully compliant with PCI-Express Base Specification Revision 1.0a and provides up to 2.5Gbps bus throughput. Each port supports transfer rates up to 250Kbps with 256-byte transmit FIFO and 16C550 UART compatibility. A low-profile bracket is included for slim chassis installations.

Legacy Windows OS support

This card suits technicians maintaining industrial equipment, point-of-sale systems or older laboratory instruments that require native RS232 connections on supported legacy Windows platforms. It is not suited for builders needing serial ports on Windows 7 or later, or for systems lacking a free PCIe x1 slot.

Two DB9 ports with low-profile option

The deciding specification is the pair of DB9 RS232 ports delivered from one PCIe x1 lane with an included low-profile bracket. If your application requires exactly two serial ports and can use the listed legacy Windows drivers, this card fits; otherwise, a different port count or modern OS support is needed.

How it compares

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

Price $23.99
Cheaper than about 62% of the 891 comparable items (median $30.99).

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Specifications

Product
Brand nameSYBA
Model nameSD-PEX15022
Product typePCI Express to Serial Port Card
Ports & slots
External connectors2 x Serial Ports
Size & build
Shipping weight0.15 kg
Package size173 × 142 × 41 mm
Compatibility
Supported operating systemsSupports Windows 2000, XP 32/64-bit, Server 2003 32/64-bit, Vista 32/64-bit, Server 2008 32/64-bit

Questions about this item

How do I install the Syba SD-PEX15022 in a low-profile chassis, and what step is often missed?

Fit the card into a PCIe x1 slot, then swap the full-height bracket for the included low-profile bracket; the step often missed is securing the bracket screw before tightening the card retention screw.

What maintenance or replacement will the Syba SD-PEX15022 need over time?

The card has no moving parts or user-serviceable components; if the MOSCHIP 9901 controller or the 256-byte FIFO buffers fail, the entire card must be replaced.

What throughput limit appears first on the Syba SD-PEX15022 during sustained transfers?

Each serial port caps at 250Kbps, so the RS-232 line rate is the first bottleneck, well below the PCIe 1.0a x1 link's 2.5Gbps capacity.

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