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Green circuit board with four silver DB9 ports and terminal block adapters

SMUGDESK

SMUGDESK 4-Port PCIe RS485/422 Serial Card with Surge Protection & Terminal Blocks

SKU CH-WSXY-22SWT

Adds four RS485/422 serial ports with surge protection and terminal blocks for industrial automation

  • Four independent RS485/422 DB9 ports with terminal blocks for field wiring
  • Built-in surge and lightning protection resists industrial voltage spikes
  • Standard PCIe x1 fits x1/x4/x8/x16 slots on industrial and desktop boards
  • Anti-interference circuit enables long-distance links to PLCs, inverters and sensors
  • Windows and Linux support gives quick plug-and-play installation for control systems

4-Port PCIe RS485/422 Serial Card

This SMUGDESK expansion card adds four independent RS485 and RS422 DB9 ports to a desktop or industrial motherboard. It ships with matched terminal block adapters for secure field wiring in automation racks. The standard PCIe x1 interface fits x1, x4, x8 and x16 slots. Windows and Linux support enables plug-and-play deployment for PLCs, inverters and sensor networks.

Sustained industrial load behaviour

Built-in surge and lightning protection plus a voltage suppression circuit guard each channel against voltage spikes common on factory floors. An anti-interference circuit maintains signal integrity over the long cable runs required by distributed field-bus devices. The hardware is engineered for continuous operation in harsh environments rather than short bench tests.

Pre-installation checklist

Verify the host has a free PCIe slot of x1 width or larger and that the bracket height matches the chassis form factor. Confirm the operating system is a supported Windows or Linux release so the driver loads without extra steps. Ensure the application can address four separate COM ports and that cabling distance stays within the RS485/422 specification limits.

How it compares

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

Price $56.99
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 much power does the 4-port PCIe RS485/422 card draw when all ports run continuously?

The card uses a standard PCIe x1 slot, so it draws power only from the motherboard slot without an extra connector.

Which operating system and motherboard slot must I already have for this serial card to work?

It requires a free PCIe x1, x4, x8 or x16 slot and runs on Windows or Linux with plug-and-play drivers.

Will the DB9 RS485/422 ports communicate reliably with my older PLCs and sensors over long cables?

Built-in surge protection and anti-interference circuits are designed for stable long-distance links to legacy industrial devices.

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