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QSP 200/300 Lisalogo.gif (1748 bytes)
Four Channel RS-422/485 Serial Adapter Card
US Prices
CDN Prices

Privacy and Security



PCMCIA card standard specification 2.1 compliant
  Client software driver for DOS & OS/2
  Selectable & shareable interrupt
  Selectable I/O base address
  Windows 95,98,ME,NT,2000,XP compatible


Quatech RS-422/485 asynchronous serial PCMCIA cards are an ideal solution for adding additional ports to full and half duplex multi-drop systems. Because they share electronic fundamentals with native bus architectures such as PCI and ISA, they function exactly like standard COM ports and can be addressed as such by most application software. In addition, their small size and the fact that the card itself can be left inside the computer at all times, make them practical choices for the most ported portable systems.

Quatech RS-422/485 serial PCMCIA cards provide many unique features that make them particularly robust and easy to use. Each of the ports is configurable as RS-422 or RS-485, and on multiport cards any combination of RS-422 and RS-485 ports can be used. For high performance is heavy multi-tasking environments, the cards are implemented with 16750 UARTs containing 64-byte FIFOs. This along with Quatech's special clock-multiplying feature enables data transfer rates as high as 921.6 kbps. (4-port cards still use 16550 UARTs for standard 115.2 kbps speeds, but are due for an upgrade soon.) They also provide a unique Auto-Toggle mode by which the hardware itself can regulate data flow in Half-Duplex mode by only driving lines while actively transmitting--providing increased speed and convenience over the older software controlled method. In addition, the cards also conserve system resources with their low power requirements that maximize battery life. They also have selectable and shareable interrupts, further extending a portable or handheld system's limited resources. And their multi-platform operating support makes them the single practical choice for a diverse fleet of portable systems.

Suggested Applications

• Long Distance Serial Links: Up to 4000 feet (RS-422/RS-485)
• Low Cost Multi-drop Networks (up to 32 on RS-485)
• Factory Automation
• Process Control
• Multi-drop data collection
• Portable computer applications


Bus Interface: PCMCIA Card Standard 2.1
Physical Dimensions: Type II (5 mm) PCMCIA card
Maximum Baud Rate: 115.2K
Power Requirements: 5 volts, 25.75 mA (typical), 33.26 mA (maximum)

COM 1 & 3
COM 2 & 4
COM 5 & 6
COM 6 & 7, etc.
Above COM 4 the QSP-200/300 will install in the lowest available continuous address block.

Connector: Four Standard DSUB-9 female connectors via a pigtail cable off the PCMCIA Card

PIN 1: Auxiliary Output
PIN 2: Data Output
PIN 3: Signal Ground
PIN 4: Data Input
PIN 5: Auxiliary Input
PIN 6: Auxiliary Output-
PIN 7: Data Output-
PIN 8: Data Input-
PIN 9: Auxiliary Input-

OS2 Warp Certified Your ALT-Text here FCC Class B Certified

Ordering Information

When placing your order, please refer to the following product numbers:

QSP-200/300 - Dual Channel RS-422/485 asynchronous serial PCMCIA Card
CP-QSP-200 - Spare cable for QSP-200/300
Drivers available for Windows 95,98,ME,NT,2000,XP
Windows 3.1 Serial Device Driver
OS/2 Serial Port Device Driver
Quatech Communication Utilities Package (DOS & WIN 95)
MID: DOS Serial Communications Package

USA Office

Address: 1480 Gulf Road, Suite 837,
PO Box 1364
Point Roberts, WA 98281

Western Canada - Vancouver BC

Tel:1.800.663.6001 or 1.604.925.6150
Address: 2454 Haywood Ave
West Vancouver, BC V7V 1Y1

Eastern Canada - Markham, Ontario

Tel:1.800.465.0164 or 1.905.513.7027