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Green PCIe expansion card with two DB9 ports and terminal block adapters

SMUGDESK

SMUGDESK PCIe Dual RS485/RS422 Serial Card 2-Port Data Adapter

SKU CH-5SMX-TD9TE

Adds two industrial RS485/RS422 COM ports via PCIe x1 with DB9 and terminal-block connectors, surge protection and Windows/Linux support

  • Dual independent RS485/RS422 ports connect industrial PLC and field bus devices
  • Long-distance anti-interference transmission maintains reliable data links in noisy environments
  • Standard PCIe x1 layout fits x1, x4, x8 or x16 slots on desktop and industrial boards
  • Built-in surge protection chip guards against unstable site voltage fluctuations
  • Windows and Linux compatibility supports industrial automation and monitoring systems

Dual RS485/RS422 Expansion Card

This PCIe card adds two independent serial ports to a desktop or industrial motherboard. It fits any standard PCIe x1, x4, x8 or x16 slot and ships with both DB9 connectors and terminal block adapters for flexible wiring. The board is designed for reliable communication with PLCs, inverters and field bus equipment in automation environments.

Industrial Automation and Monitoring Use

The card suits engineers integrating legacy serial devices into modern PC-based control systems. Built-in surge protection guards the port circuitry against voltage fluctuations common on industrial sites. Buyers who need USB or Ethernet connectivity, or who require more than two serial channels, should look at alternative interface adapters.

x1 PCIe Slot Compatibility

Installation requires a single PCIe x1 lane, which is physically present on all larger PCIe slots. Driver support covers Windows and Linux platforms for broad operating system flexibility. Verify that the target application uses RS485 or RS422 signalling before purchase.

How it compares

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

Price $52.99
Pricier than about 89% 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 interface standard does the card use, and what slot speeds does it support?

The card uses a standard PCIe x1 layout and works in PCIe x1, x4, x8 and x16 slots on desktop and industrial motherboards.

What physical connectors and mounting hardware are included?

The card provides two DB9 ports and includes matching terminal block adapters for RS485/RS422 field wiring.

How is the card installed, and what step is commonly missed?

Install the card into a free PCIe slot, secure the bracket, then attach the terminal blocks to the DB9 ports before wiring field devices.

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