W&T Electronics 13011, Руководство пользователя

Страница: 20 / 36

56
W&T
Serial PCI cards
Galvanic isolation and ESD protection
Ports 1 and 2 on all W&T PCI interface cards are galvanically
isolated from each other and from the PC with an isolation vol-
tage of at least 1kV DC, whereas the optional ports 3 and 4 have
no galvanic isolation from the PC.
Galvanic isolation of the signals is implemented using fast
opto-couplers; driver and receiver chips are powerd by a galva-
nically isolated DC/DC converter. Please note that the shielding
for the port connectors has a direct connection to the chassis
ground of the PC using the metallic slot bracket.
The signal lines for the serial ports are protected against static
discharge for a voltage of up to 15kV per IEC 801-2, Level 4.
Driver and software installation
All the serial PCI interface cards are accessible under the va-
rious operating systems only using special drivers. These dri-
vers are subject to continuous improvement both with respect
to their technical features and the number and type of suppor-
ted operating systems.
For this reason W&T makes the current drivers and software in-
stallation manuals available on the data sheet pages for the PCI
cards in the Internet under http://www.wut.de.
Implementing optional ports 3 and 4
As an option all serial interface cards are able to also provide
two additional serial ports (ports 3 and 4) in addition to the
two ports integrated on the card. These ports are configured
on the card as serial TTL interfaces which can be converted into
the desired interface type by using interface modules.