Antaira MSC-204B1 (-SI) 4-port RS-422/485 PCI Express Card, Oxford Chip

4-port RS-422/485 PCI Express Card, Oxford Single Chip Solution, Low & Standard Profile Brackets Included (WHQL Certified)
Model: MSC-204B1
Availability: Contact Westward Sales
Qty: Add to Cart

Antaira MSC-204B1 4-port RS-422/485 PCI Express Card, Optional Surge and Isolation Protection

The MSC-204B1, manufactured by Antaira Technologies, is a RS-422/485 PCI Express (PCIe) card that adds 4 serial ports to desktops, servers and industrial computers.  It may function as a client or server to connect serial based devices like instruments, scanners, meters and sensors.  A break out cable expands the front panel DB-44 connector to four male DB-9 connectors with secure screw locks.  It supports 2-wire and 4-wire RS-422/485 connections and transfer rates to 921.6 Kbps.

Key Features

  • 4 RS-422 or RS-485 serial ports
  • Compliant with PCIe Specification 1.1
  • Fits standard x1 PCIe slots
  • ATTA auto RS-485 transmitter buffer control
  • 128 byte FIFO per transmitter and receiver
  • 4 male DB-9 connectors over a breakout cable (included)
  • RS-422/485 2-wire and 4-wire modes
  • Baud rate to 921.6 kb/s
  • Optional surge and isolation protection
  • Low and standard height brackets included
  • The MSC-102B1 includes a CD-ROM with drivers, utilities and a quick start guide
  • 5 year warranty


MSC-204B1,     no surge and isolation protection
MSC-204B1-SI, surge protection of 15 kV and isolation protection of 2,500 Vrms  (this option is discontinued)

Windows and Linux operating system device drivers are included.  With the plug-and-play wizard located on the CD-ROM, installation and setup is simple.  The wizard will recognize the card and install the correct driver software automatically.  You’ll be sending data in no time.

Total Ports4
TypeSerial Connectivity
Operating System SupportWindows, Linux
Camera Sensor
TypePCI and PCIe Boards
Serial Interface
CategoryPCI and PCIe Boards
Serial Ports4 RS-422/485
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
Surge Protection15KV ESD Protection
Isolation Protection2,500 Vrms
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
Download NameFile Size
MSC-204B1 Datasheet2.89MB
MSC-204B1 Quick Start Guide517.25KB