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Green circuit board with four silver DB9 ports and a gold edge connector

SMUGDESK

SMUGDESK Mini PCIe to 4-Port Industrial RS232 Serial Card DB9 COM Expansion Adapter -40 to +85

SKU CH-CH6Q-XMYRR

Adds four RS232 DB9 serial ports via Mini PCIe, operating reliably from -40 to +85 °C for harsh industrial environments

  • Adds four DB9 RS232 ports to a Mini PCIe slot
  • Operates reliably from -40°C to +85°C in harsh environments
  • Industrial serial chip resists interference for PLCs and sensors
  • Compact form factor fits embedded boards and box PCs
  • Works with Windows and Linux for plug-and-play setup

Mini PCIe RS232 expansion card

The SMUGDESK adapter converts a Mini PCIe slot into four DB9 COM ports for embedded industrial equipment. It targets system integrators who need reliable serial connectivity in harsh field environments. Industrial wide-temperature design keeps the card stable from -40°C to +85°C.

Builders needing rugged serial I/O

This card suits automation engineers adding PLC, sensor or data-collector links to compact box PCs. The premium control chip resists interference in electrically noisy plants. It is not for users who require USB, Ethernet or fibre interfaces, nor for desktop PCs lacking a Mini PCIe interface.

Operating temperature range

The -40 to +85 rating is the single spec that decides fit: if your enclosure stays within this window the card will operate without throttling or failure. Outside that range you must choose a different serial expansion method.

How it compares

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

Price $61.99
Pricier than about 90% of the 354 comparable items (median $21.99).

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Specifications

No published specifications for this item yet.

Questions about this item

How can I confirm the four COM ports are recognised after installing the card?

Check Device Manager on Windows or run dmesg on Linux; all four RS232 ports should appear as separate COM devices without errors.

What comes in the box and what must I source separately?

The card itself is included; you will need a compatible Mini PCIe slot on the host board and standard DB9 cables for each of the four ports.

Which version should I choose for a system that runs between -40 and 85 degrees Celsius?

This single model is rated for the full -40 to 85 range, so no alternate capacity or temperature variant needs to be selected.

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