PCI Express to 8-Port RS422/485 Serial Optical Iso / Surge Protection

Windows 10 Optically Isolated PCIe to RS422/485 Card

This PCIe Add on Card extends your systems RS422 or RS485 serial device connections by 8! Using this PCI Express Card interface and a DB44 to DB-9(8x) octopus cable connection enables Optical Isolation, ESD, and Surge protections to you serial signal devices. All cable connections are screw lock mechanisms for secure point to point contact.

  • Provides Optical Isolation, ESD, and Surge protection
  • Provides 8 additional industrial serial COM ports
  • Easily installed and configured in your system
  • Each port is with 256 bytes FIFO for transmit and receive


Out of Stock

Model No. CG-8PCIei-SI

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Optical Isolated and Surge Protected Industrial PCIe Card to RS422/485

PCI Express 8-port industrial serial I/O card is a plug & play high-speed serial I/O expansion card for the PCI Express bus. Connecting to a PCI Express bus on your computer, the PCI Express 8-port industrial serial I/O card instantly adds eight RS-422/485 serial I/O communication ports to your system.

The PCI Express to 8-port industrial serial I/O card provides optical isolation and 3000 Volt DC optical isolation and are designed to support high-speed serial port data rate up to 921.6K bps. Each serial port is fully compatible with 16C550 UART, with enhanced feature of 256 bytes TX and RX FIFO buffer for higher performance.

PCI Express Serial I/O Features

  • PCIe 2.0 Gen 1 compliant
  • PCI Express 1 Lane compliant
  • 16C550 compatibility
  • 256 bytes receive FIFO buffer
  • 256 bytes transmit FIFO buffer for high speed data throughput
  • Automatic RTS/CTS or DTR/DSR hardware flow control with programmable hysteresis
  • Automatic Xon/Xoff software flow control
  • Drivers provided for Windows and Linux O.S
  • Wide ambient temperature operation 0°C to 60°C (32°F to 140°F)
  • CE, FCC approval
  • Supports eight high speed RS-422/485 serial ports with data transfer rate up to 912.6 Kbps
  • Provides 15KV ESD protection and 600W surge protection for all serial signals
  • Provides 3000 Volt DC optical isolation for all serial signals
  • One DB-44 high density female connector on board
  • Provides one DB-44 to eight male DB-9 cable. Cable length: 100 cm
  • RS-422 data signals: TxD-, TxD+, RxD+, RxD- , GND
  • RS-485 data signals: TxD-, TxD+, RxD+, RxD- , GND (4 wire) and data-, data+, GND (2 wire)
  • Works with Windows 10 32-bit/64-bit, 8.1, 8, 7 32-bit/64-bit, Linux


  • Bus Connection: PCI Express; Single-Lane (x1)
  • Interface: RS-422 / RS-485
  • Chipset: EXAR XR17V358
  • Support Plug and Play
  • Protection: 15KV ESD protection and 600W surge protection for all serial signals
  • IRQ & I/O address assigned by the system BIOS
  • Data Bits: 5, 6, 7, 8
  • Parity: None, Odd, Even, Mark , Space
  • Stop Bits: 1, 1.5 , 2
  • Operating Temperature: 0°C to 60°C
  • Storage Temperature: -40°C to 85°C
  • Humidity: 0 to 80% RH. Non-condensing
  • Safety Approvals: CE, FCC

OS Support:

  • Windows XP, Vista, Windows 7, Windows 8, and Windows 10
  • Linux and Mac OS 10.X

Package Contents

  • PCI Express Card
  • 100 cm Octopus Cable
  • Driver Disc

Product Specifications



Product Type

Add-on Cards > PCI Card > Serial


Black, Green

Isolated/Surge Protected


Screw Lock Compatible


Serial Attributes
Serial Standards


Serial Ports


OS Support

Linux, Win 10, Win 7, Win 8, Win 8.1



Isolated/Surge Protected


Other Data

DB44, DB9 Male


1.337 lbs


8.250 × 5.625 × 2.250 in

UPC: 736983902818

Product Documentation & Drivers

Need drawings, CAD files, or other compliance documentation? Click HERE

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