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SIIG, Inc > 
Item#: 9SIA0ZX2C34881

SIIG DP 2-Port RS422/485 PCIe Adapter Card with 15KV ESD protection Model ID-P20211-S1 - OEM

  • PCI Express to Serial Port Card
  • 921Kb/s Data Transfer Rate
  • Email this page
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SIIG's DP 2-Port RS422/485 PCI Express Adapter Card easily adds two RS-422/485 serial ports with 15KV ESD protection to your PCIe enabled desktop computer. This high quality RS-422/485 serial adapter card supports serial port data transfer rates of up to 921Kb/s, features built-in 128-byte FIFO buffers and RS-422/RS-485 auto detection and auto switching. The DP 2-Port RS422/485 PCI Express Adapter Card packs powerful and advanced technologies such as 15KVDC ESD protection for the serial port interface to ensure reliable data transfer, stable performance and long life and dual-profile design to fit into either full height or low profile system chassis with the included brackets.

The DP 2-Port RS422/485 PCI Express Adapter Card supports a wide variety of Windows operating systems, meets RoHS hazardous materials standards, comes with FCC and CE regulatory approvals and is backed by SIIG's limited lifetime warranty.

Learn more about the SIIG, Inc ID-P20211-S1




PCI Express to Serial Port Card
External Ports
2 x Serial Ports
Data Transfer Rate
Operating Systems Supported
Windows 7 (32-/64-bit) / Vista (32-/64-bit) / XP (32-/64-bit) / Server 2003 & 2008(32-/64-bit) / Server 2008 R2 / 2000
Chipset: Oxford OXPCIe952

Compliant with PCI Express Base Specification, Revision 1.1

Supports PCI Power Management 1.2 standard

Supports PCI Express native and legacy mode operation

Automated hardware flow control using CTS/RTS & DSR/DTR

Deep 128-byte receive/transmit FIFOs

RS-422 & RS-485 auto detect and switch

Automated in-band flow control using programmable Xon/Xoff characters

Plug-n-Play, I/O address and IRQ assigned by BIOS

Supports 3.3 voltage operation

Form factor: Full profile / Low profile

Connector: 1x 44-pin, DB44, Female

Fan out cable:
- Length: 8.27" (21cm)
- 1x 44-pin, DB44, Male
- 2x 9-pin, DB9, Serial, RS-232, Male
- Color: Black

Environmental conditions:
- Operating temperature: 32 to 122 degrees F
- Storage temperature: -4 to 140 degrees F
- Operating humidity: 5% to 85%
- Storage humidity: 5% to 85%

Certifications/Standards: FCC, CE, RoHS

Physical Spec

4.13" (W) x 4.72" (H) x 0.71"(D)
0.12 lbs.


Supports serial port data transfer rate up to 921Kb/s

Built-in 15KVDC ESD serial interface protection

Built-in 128-byte FIFO buffer

Dual profile design to work with full height and low profile chassis with included brackets


Package Contents
DP 2-Port RS422/485 PCI Express Adapter Card
Spare enhanced low-profile bracket
Fan out cable
Driver CD
Jumpers (4)
User's manual

Quick Info


  • Limited Warranty period (parts): 2 years
  • Limited Warranty period (labor): 0 day

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Home > 
Computer Hardware > 
Computer Accessories > 
Add-On Cards > 
SIIG, Inc > 
Item#: 9SIA0ZX2C34881
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