Antaira MSC-204A2 4-Port RS-232 PCI Express Card, DB-9 Power Pins

4-Port RS-232 PCI Express Card, Support Power Over Pin-9
Model: MSC-204A2
Availability: Discontinued
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Antaira MSC-204A2 4-Port RS-232 PCI Express Card with Power Over Serial Connectors

The MSC-204A2, by Antaira Technologies, is an RS-232 PCI Express (PCIe) card that adds 4 ports of serial communication to desktop computers, industrial servers and workstations.  It may function as a client or server to connect serial based hardware like scanners, RFID card readers, instruments and serial sensors.  A break out cable expands the front panel connector to four male DB-9 connectors.  DB-9 power pins are available to supply 5V and 12V.  The MSC-204A2 is 16C950 and 16C550 UART compatible and fits any standard x1 PCIe slot.  It supports data framing, flow control and a baud rate to 921.6 Kbps.


  • 4 RS-232 serial ports
  • x1 PCIe throughput of 250 MB/s
  • Meets PCI Express Specification 1.0a
  • Fully compatible with16C550 and16C950 UART devices
  • Low and standard height panel brackets included
  • Baud rate up to 921.6 Kbps
  • 128 byte high-performance FIFO per transmitter and receiver
  • Provides 5V or 12V over serial connectors
  • 5, 6, 7, 8, 9-bit data framing
  • Automated in-band bi-directional flow control using Xon / Xoff
  • Automated out-of-band flow control using CTS#RTS# and/or DSR#DTR#
  • A CD-ROM with drivers, utilities and a quick start guide is included
  • 4 port DB-9 male breakout cable included
  • 5 year warranty

The MSC-204A2 software includes support for Windows and Linux operating systems.  The plug-and-play wizard located on the CD makes installation quick and easy.  It will recognize the card and install the correct device driver software automatically.  You’ll be communicating in minutes.

Total Ports4
TypePCI Express
Operating System SupportWindows, Linux
Serial Interface
Serial Ports4 x RS-232
Baud RateUp to 921.6 Kbps
Data Bits5, 6, 7, 8, 9
ParityNone, Odd, Even, Mark
Flow ControlXon / Xoff
SignalsCTS, RTS / DSR, DTR
Host Controller16C550/16C950 UART Compatible
Serial PowerSelect 5 VDC or 12 VDC over DB9 pins
FIFO128 Byte
Connector Type4 x DB9 male connectors via cable
Operating Temperature0 to 55°C
Storage Temperature-40 to 75°C
Humidity5 to 95% non-condensing
CertificationsCE, FCC, RoHS
Warranty5 Years
Tags: MSC-204A2