Quatech RS-232 PCI boards utilize a
single PCI slot to provide two, four, or eight independent asynchronous serial
ports that share a single interrupt. All PCI registers are properly implemented,
so you can be assured that Quatech boards will be good citizens on the PCI bus.
Serial port connections are made via DB-9 male connectors, DB-25 male
connectors, RJ-11 modular connectors (8 port only) or using a breakout box
providing one DB-25 male and seven DB-9 male connectors (8 port only).
The boards are implemented with 16750
UART's containing 64-byte FIFO's. They use a clock multiplying feature allowing
the to achieve data rates as high as 921.6 kbps. To maintain maximum signal
integrity, Quatech uses a four-layer board design. But, for even more protection
in industrial environments, an optional surge suppression package is available.
This "IND" option applies a surge suppressor to each line that is capable of
sustaining up to 40A peak, 8 x 20µs transient surges, a clamping voltage of 30V
and a peak energy dissipation of 0.1 Joules. (Note that implementing the IND
option restricts the board's speed to 115.2 kbps.)
