PRODUCTS > PCI Express I/O Cards > PCIe-400


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PCIe-400 - 4-Port PCI Express to RS-232 Card


  • Adds four high speed RS-232 ports by connecting to a PCI Express bus

  • Data rates up to 921.6kbps

  • 256 bytes transmit and receive FIFO buffer

  • Automatic RTS/CTS and DTR/DSR hardware flow control with programmable hysteresis

  • Automatic Xon/Xoff software flow control

  • 15kV ESD protection for all signals

  • Wide ambient temperature operation from 0°C to 60°C (32°F to 140°F)

  • PCI Express 2.0 Gen 1 compliant

  • PCI Express 1 Lane compliant

  • 16C550 compability

  • CE, FCC approval

  • Drivers provided for Windows and Linux OS

Bus PCI Express; Single-Lane (×1)
Chipset EXAR XR17V354
Interface RS-232
Plug & Play Supported
IRQ & IO Address Assigned by system BIOS
Mechanical PCIe-400 with standard bracket
PCIe-400LP with low profile bracket for slim case
Serial Port
Number of Ports Four
Connectors & Cables One DB44 male connector on card
One DB44 female to two DB9 male adapter cable included
RS-232 Signals DCD, RxD, TxD, DTR, GND, DSR, RTS, CTS, RI
Max. Bitrates 921.6kbps
Serial Configuration Data bits: 5, 6, 7, 8
Parity: None, Odd, Even, Mark, Space
Stop bits: 1, 1.5, 2
UART FIFO Buffer Size Each port with 256 bytes FIFO for transmit & receive
Protection 15kV ESD protection
Operating Temperature 0°C to 60°C
Storage Temperature -40°C to 85°C
Humidity 0 to 80% RH, Noncondensing
Safety Approvals CE, FCC

RS-232 DB9 Male Connector Pin-outs
  Pin Signal Description  
  1 DCD Data Carrier Detect  
  2 RxD Receive Serial Data  
  3 TxD Transmit Serial Data  
  4 DTR Data Terminal Ready  
  5 GND Signal Ground
  6 DSR Data Set Ready  
  7 RTS Request To Send
  8 CTS Clear To Send  
  9 RI
Ring Indicator