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Specifications
system. To all intents and purposes, it looks just like an ordinary
RS232 COM port to the host PC. Autogating for half duplex
operation is a necessity for Windows 95, NT and the forthcoming
Windows 98 (Memphis) and Windows NT 5.
Optical Isolation.
The PCI Opto Iso RS422/485, as mentioned above is
identical in installation procedure to the PCI Velocity RS422/485.
In addition, it also has optical isolation circuitry on board that
allows protection of:
This isolation present on board also allows greater
protection from current surges, lightning strikes to both the card
itself and the PC, and also it improves noise immunity by isolating
the PC from the cards transmit ground.
PCI VELOCITY / OPTO ISO RS422/485
1500 Volts DC
1000 Volts AC
Chapter 2 Page 8
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