IBT Technologies Inc.
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IBT Technologies Inc.; 5405 Thimens; Quebec, Canada H4R 2H4; 1-866-590-4288; info@ibt.ca
I/O 8139SI PCI Parallel 2 ports RS-422/485 Card
with Surge & 2.6KV isolation Protection
Product detail



Universal PCI Multi-port serial card provides RS-422/485 Serial connection ports on your system for industrial communication and automation applications. The 8139 card works on both 32-bit and 64-bit PCI Bus with 3.3V or 5V power, allowing this multi-port serial card to be installed in virtually any PC system and compatible with all major operating systems. The card supports multi independent RS-422 or RS-485 ports, with each port transfer data up to 921.6 Kbps and able to control device in a multi-drop mode. Furthermore, Isolation and Surge protection (optional) can protect your equipment and controller from being damaged by static electrical charge and high energy spike. ARSC™ (Auto RTS Signal Control) technology provides the best way to make half-duplex RS-485 auto data transmission and receiving without software or writing extra code. In addition, RS-422/485 Auto Identify & Switch technology allows users the convenience of changing between RS-422 and RS-485 devices without jumper or switch setting. Universal PCI Multi-port serial card is the best solution for various industrial communication and automation applications.


  • Low RMA rate and high reliability with single chipset designed ASIC
  • Compliance with PCI ver. 2.2 spec. standard
  • Supports both 64-bit & 32-bit PCI bus slot and 3.3V & 5V power
  • Industrial grade design for stability and reliability
  • 128K FIFO buffer can reduce CPU loading, less interruption and improving system performance dramatically
  • RS-422/485 Auto Identify and Switch technology enable device plug-n-play without jumper or switch setting
  • ARSC™ (Auto RTS Signal Control) technology allows accurate switching of the transmitter on and off for precise timing of the data transmission
  • Optical isolation (2.5KV) provides protection against damage from static electrical charge
  • Surge protection (600W) provides protection against surge damage from high energy spike
  • RS-422/485 Handshaking Communication provides hardware flow control for best prevention of data error or data lost
  • Plug-n-Play, I/O address and IRQ assigned by BIOS
  • RS-422/485 industrial host controller series are certified by WHQL, CE, FCC approval
  • Support Microsoft Windows, Linux, and DOS


Type Universal PCI Serial card
Mode of Operation Differential
Bus Transceiver RS-422 Full-Duplex
RS-485 Half-Duplex
Driver per Line RS-422: 1 Driver
RS-485: 32 Drivers
Receiver per Line RS-422: 10 Receivers
RS-485: 32 Receivers
Host Controller SUN1889 UART (16C650 compatible)
Bus Interface 32-bit / 64-bit Universal PCI
3.3V / 5V bus power
PCB Connector DB9M connector
Number of Port 2 x RS-422/485
Dimensions (WxD) 120 x 80 mm
Bracket Standard 121 mm
IRQ & I/O Address BIOS assigned
FIFO 32 byte on-board FIFO
128K byte assigned FIFO
RS-485 RTS Control Auto RTS Signal Control (ARSC™)
RS-422/485 Select RS-422/485 Auto Identify & Switch (AIS)
Baud Rate Up to 921.6 Kbps
Data Bits 4, 5, 6, 7, 8
Stop Bits 1, 1.5, 2
Parity None, Odd, Even, Space, Mark
Flow Control None, Xon/Xoff, RTS/CTS
Data Signal RS-422: Tx+, Rx+, Tx-. Rx-, RTS+, CTS+, RTS-, CTS-
RS-485: Data+, Data-, RTS+, CTS+, RTS-, CTS-
Isolation Protection 2.5KV Peak Pulse Power
Surge Protection 600W ESD
OS Support
64-bit System Intel® Itanium® and AMD® Athlon 64® 64-bit CPU System
Microsoft Win 9x/ME/NT, Win 2K/XP/2003, Win CE
Linux 2.0.x / 2.2.x / 2.4.x / 2.6.x
Operating Environment
Operating Temperature 0 ~ 57 °C
Humidity 5 ~ 95% RH
Storage Temperature -20 ~ 85 °C
Regulatory Approvals
Hardware CE, FCC (Class B)
Driver WHQL

Package list

  • 8139 PCI Card
  • Software & driver CD
  • User manual
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