55
W&T
Serial PCI cards
Subject to error and alteration
Standard PCI cards: Common characteristics
Function
All W&T serial interface cards for PCI bus systems add the func-
tionality of maximum four additional serial ports to your PC.
Two of these ports (port 1 and port 2) are integrated on the
interface card, whereas two additional, optional ports (ports 3
and 4) are connected to the circuit board through ribbon cable.
These 2 optional ports are configured on the PCI card as serial
TTL interfaces which can be converted into any serial standard
interface (RS232, RS422, RS485 or 20mA) using W&T Interface
Modules.
P
o
rt
1
P
o
rt
2
P
o
rt
3
P
o
rt
4
Pin
1
Pin
2
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