Quatech QSC-100 Bedienungsanleitung PDF herunterladen (Seite 7)

1 General Information

The Quatech, Inc. QSC(LP)-200/300 provides four RS-422 or RS-485 asynchronous

serial communication interfaces for IBM-compatible personal computer systems using the PCI

expansion bus. The QSC(LP)-200/300 uses Quatech's new Enhanced Serial Adapter design.

Legacy serial port data rates are limited to a maximum of 115,200 bits per second. Quatech

Enhanced Serial Adapters can achieve data rates as high as 921,600 bits per second.

As a PCI device, the QSC(LP)-200/300 requires no hardware configuration. The card is

automatically configured by the computer's BIOS or operating system. The four serial ports share

a single interrupt line and are addressed in a contiguous block of 32 bytes. A special interrupt

status register is provided to help software to manage the shared interrupt.

The QSC(LP)-200/300's serial ports use 16750 Universal Asynchronous

Receiver/Transmitters (UARTs). These UARTs contain hardware buffers (FIFOs) which reduce

processing overhead and allow higher data rates to be achieved. The 16750 contains a 16-byte

FIFO and can transmit and receive data at a rate of up to 921,600 bits per second. The 16750 is

recommended for heavy multitasking environments and for applications involving high data

rates.

The QSC(LP)-200/300 is supported under several popular operating systems and

environments. Contact the sales department for details on current software offerings. Most device

drivers are available for download from the Quatech world wide web site at

http://www.quatech.com.

1.1 Features

The standard QSC(LP)-200/300 implements each of its communication channels with a

16750 UART and uses standard line driver and receiver components. For improved performance

and industrial-grade reliability, Quatech offers the following board upgrades:

1.1.1 "IND" Option --- Surge Suppression Upgrade

The "IND" option provides the protection essential for reliable use in an industrial

environment. Each communication line has a surge suppressor capable of sustaining up to 40A

20us peak transient surges, a clamping voltage of 30V and a peak energy dissipation of 0.1

Joules.

yesQSC(LP)-200/300IND

noQSC(LP)-200/300

IND OptionPart Number

Figure 1 --- QSC(LP)-200/300 Product Series Summary

Quatech QSC(LP)-200/300 User's Manual 5

1 2 3 4 5 6 7 8 9 10 11 12 ... 33 34

Keine Kommentare

Quatech QSC-100 Bedienungsanleitung Seite 7