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White PCIe card with two DB-9 serial ports and silver bracket

locrest

locrest 2-port DB-9 Serial RS-232 PCIe Card WCH382 White

SKU CH-81RM-GNZ2T

Adds two DB-9 serial ports via PCIe x1 with WCH382 chipset, supporting RS-232, RS-422 and RS-485 at up to 16 Mbps per port

  • Add two serial ports to modern PCs via PCIe x1
  • WCH382 chipset supports RS-232, RS-485 and RS-422 modes
  • Data rates from 50 bps up to 16 Mbps per port
  • On-chip 256-byte FIFOs reduce CPU overhead
  • Compatible with Windows, Linux and macOS systems

Two-Port RS-232 PCIe Card

The Locrest card adds two DB-9 serial ports to a desktop computer through a single PCI Express x1 slot. It uses the WCH382 chipset and complies with the PCI Express 1.0a base specification. The board provides full modem control and hardware or software flow control for each port.

Industrial and Legacy Equipment Users

The card suits engineers who connect PLCs, barcode scanners or older modems that still rely on RS-232, RS-422 or RS-485 signalling. It is not for builders who need high-speed networking such as Gigabit Ethernet or fibre connections. It also does not serve users whose operating system is older than Windows 2000 or Linux kernel 2.6.11.

WCH382 Chipset with 16 Mbps per Port

The WCH382 controller drives each serial port at bi-directional speeds from 50 bps up to 16 Mbps. On-chip 256-byte FIFOs in both transmit and receive paths reduce CPU overhead during sustained transfers. This throughput ceiling is the decisive figure when matching the card to a specific device’s baud-rate requirement.

Highlights

  • Add two serial ports to modern PCs via PCIe x1
  • WCH382 chipset supports RS-232, RS-485 and RS-422 modes
  • Data rates from 50 bps up to 16 Mbps per port
  • On-chip 256-byte FIFOs reduce CPU overhead
  • Compatible with Windows, Linux and macOS systems

Specifications

BrandlOCrest

Questions about this item

Will this PCIe x1 serial card fit in an older motherboard that only has PCI slots?

No, the card requires a PCI Express x1 slot and is not compatible with legacy PCI slots.

How can I verify the WCH382 chipset is operating at 16 Mbps per port after installation?

Check Device Manager port settings for the configured baud rate and run a loopback test at 16 Mbps to confirm throughput.

Does the package include cables for RS-422 or RS-485 devices, or only the card and driver CD?

The box contains the 2-port PCIe card, a driver CD and a user manual; DB-9 cables for RS-422 or RS-485 must be purchased separately.

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