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Green PCB card with silver bracket, two DB9 and one DB25 ports

SMUGDESK

SMUGDESK AX99100 PCIe Serial Parallel Combo Card 2×DB9 RS232 + DB25 LPT

SKU CH-03VY-1A999

Adds two DB9 RS232 COM ports and one DB25 parallel LPT printer port through a single PCIe slot using the AX99100 chip

  • Adds two serial and one parallel port via single PCIe slot
  • AX99100 chip ensures stable continuous data transmission
  • Connects industrial controllers, POS systems and test instruments
  • Fits standard desktop cases with full-height PCIe bracket
  • Drivers included for Windows and Linux for quick setup

Dual RS232 and LPT expansion

The SMUGDESK AX99100 PCIe card adds two DB9 serial ports and one DB25 parallel port through a single PCI Express slot, restoring legacy connectivity on modern motherboards. The AX99100 controller chip provides stable data transmission for continuous operation in industrial and office environments. Standard full-height bracket fits regular desktop cases and accepts x1 through x16 slots. Drivers are included for Windows and Linux platforms.

Industrial automation and legacy printing

This adapter suits technicians maintaining RS232-controlled machinery, POS terminals or test instruments alongside parallel printers. Offices with older LPT printers gain a direct connection without USB converters. Builders using low-profile or small-form-factor chassis cannot install the full-height bracket. Users needing only USB or Ethernet interfaces will not benefit from this card.

Two COM ports and one LPT port

The card delivers two independent RS232 channels and a single parallel channel for simultaneous device connections. Each DB9 port handles standard serial equipment while the DB25 port drives compatible printers. Bandwidth is limited to the PCIe lane allocated by the motherboard slot. High-throughput or multi-device serial clusters requiring more than two ports will exceed the available channels.

How it compares

Measured against everything we stock in Interface & Card Adapters, at today’s prices. Recalculated every night.

Price $20.99
Cheaper than about 55% of the 354 comparable items (median $21.99).

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Specifications

No published specifications for this item yet.

Questions about this item

What PCIe slot sizes does the AX99100 card accept?

The card fits any standard PCIe x1, x4, x8 or x16 slot on a desktop motherboard.

Will the DB25 parallel port drive my legacy dot-matrix printer?

Yes, the LPT port is designed for traditional parallel printers such as dot-matrix models.

How do I verify both RS232 ports are active after installing the driver?

Open Device Manager on Windows or run dmesg on Linux; two new COM ports should appear for the AX99100 device.

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