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IBT Technologies Inc.; 5405 Thimens; Quebec, Canada H4R 2H4; 1-866-590-4288; info@ibt.ca
I/O 4437A 2 ports RS-232 PCI-Express Card
Product detail



PCI Express serial communication board meets the new interface standard for expansion board. It is compatible with PCI Express x1, x2, x4, x8, and x16 lane Bus, enabling this board to be installed in any PCI Express capable PC system. Majority of today’s motherboard no longer come with serial ports or only have one port, with PCI Express serial board, users can add or expand 4 ports of serial interface on their system, allowing them to connect their serial devices. PCI Express Serial Board is the advanced and high efficient solution for commercial and industrial automation applications.


  • Expands 4 RS-232 serial ports with communication speeds up to 921.6Kbps
  • Designed to meet PCI Express Base Specification Revision 1.1
  • Supports x1, x2, x4, x8, x16 (lane) PCI Express Bus connector keys
  • High speed SUN1889/SUN1699 16C650 compatible UART controller
  • On-chip hardware auto flow control to guarantee no data loss
  • Built-in 32 byte hardware FIFO & 128K byte DMA software FIFO
  • Built-in 15KV ESD protection for all serial signals
  • Certified by Microsoft WHQL, CE, FCC approval
  • Support Linux, Microsoft Windows 2000, XP, and 2003
  • Ready for the Intel and AMD 32/64-bit CPU system


Serial Communication
Interface RS-232
Controller SUN1889 / SUN1699(16C650 UART Compatible)
BUS PCI Express one lane (x1) Bus
No. of Port 4456A/AL: 4-port
Port Type DB9 / 25 Male
IRQ & IO Assigned by System
FIFO 32byte Hardware & 128Kbyte DMA FIFO
Baud rate 75bps ~ 921.6 Kbps
Data bit 5,6,7,8
Stop bit 1,1.5,2
Parity even, odd, none, mark, space
Flow Control None, Xon/Xoff, RTS/CTS
Protection 15 KV ESD protection for all signal
Driver Support
Microsoft Windows 2000/XP/2003 (32/64-bit)
Linux Linux 2.4.x / 2.6.x
Regulatory Approvals
Hardware CE, FCC
Software WHQL
Operating Environment
Operating Temperature 0 ~ 57 °C
Humidity 5 ~ 95% RH
Storage Temperature -20 ~ 85 °C
Available Model
4437A 2 ports RS-232 PCI-Express Card
4456A 4 ports RS-232 PCI-Express Card
4456AL 4 ports RS-232 PCI Express Low Profile Board
4466A 8 ports RS-232 PCI-Express Card
Optional Acessories
1. DB62 to 8 ports DB9/25 male connection cable, 40/100cm (4466A)
2. DB62 to 8 ports DB9/25 male connection ArrayBox (4466A)
3. DB44 to 4 ports DB9/25 male connection cable, 40/100cm (4456A/AL)

Package list

  • PCI/104 RS-232 Embedded Board
  • Cable : 2 x 10-pin IDC to DB9M or DB25M
  • Software & driver CD
  • User manual
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