Low Profile PCI Card 1x RS232/RS422/RS485
1 galvanically isolated RS232/RS422/RS485 port, 3 non-isolated TTL interfaces

The serial ports on all W&T PCI interface cards are galvanically isolated from each other and from the PC with an isolation voltage of at least 1kV DC.
Galvanic isolation of the signals is implemented using fast opto-couplers; driver and receiver chips are powered by a galvanically isolated DC/DC converter.
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.

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