• Four ports, each configurable as RS-422 or RS-485
• Speeds to 921.6 Kbps each port simultaneously
• Full duplex and half duplex modes supported
• RTS/CTS handshaking supported
• Windows 95, 98, Me, NT 4, 2000, XP and Linux supported
• VCS Async Ready
• Optional cables for DB-9 or DB-25 available
• 5 year warranty by Quatech
• Surge suppression option available

RS-422/485 Serial PCI Card:
QSC-200/300 Four Port

Quatech RS-422/485 asynchronous serial PCI boards are an ideal solution for adding additional ports to a wide variety of systems.

The ports are jumper configurable for either RS-422 or RS-485 in any combination for full and half duplex use.

PCI registers are properly implemented to assure that Plug and Play works reliably, and that the board will not cause PCI bus conflicts.

For high performance is heavy multitasking environments, this card is 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.

A four-layer board design is used to ensure maximum signal integrity.

Note the availability of an "IND" model which features onboard surge suppressors.

SKU and Prices

NOTE: You will need to order a cable for this card.

sysFire SKU: QSC-200-300

 PDF Data Sheet
 Quatech Product Selection Matrix Guide
 Standard Quatech Drivers Download
 PDF Manual Download
 Show pinout of DB-37 connector.
 Show pinout of DB-9F connector.
 Show pinout of DB-25M connector.

Detailed Specifications

• Bus Interface: 32-bit, 33 MHz PCI Bus specification 2.2 compliant
• OS Support: Windows CE/9x/Me/NT/2000/XP, OS/2, DOS, Linux
• 921.6 Kbps (max*) each port simultaneously.
• Cables: Optional cable from onboard DB-37 to either four DB-9F or four DB-25M connectors.
• Tramsceiver: MAX491 or compatible
• Drivers:
  Diferential Voltage: +2V (min).
  Transition Time (TLH) 15 ns (typ), 40 ns (max).
  Transition Time (THL) 15 ns. (typ)
• Receive Buffers:
  Differential Input Threshold: +/- 0.2V.
  Voltage Range: -7V to +12V Common Mode Input.
  Transition Time (THL-TLH) 15 ns (typ).
• Environment:
  Operating: 0°C to 70°C.
  Storage: -50°C to 80°C.
  Humidity: 10% to 90%
• Power Requirements: 320 ma (+5V)
• Size: 5.0" x 3.7"
• Certifications: CE, FCC Class B
• IND Option: Surge suppressor applied to each line that is capable of sustaining up to 40A peak, 8 x 20µs transient surges, a clamping voltage of 15.5V and peak energy dissipation of 0.1 Joules.
  NOTE: The "IND option limits data rates to 115.2 Kbps due to capacitive loading.