PCL-746+ 4-port RS-232/422/485 Communication Card
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The PCL-746+ is a four port serial communication interface card. Each port can be configured individually to either RS-232, RS-422 or RS-485 using on-board jumpers. The PCL-746+’s four 16C550 UARTs (on-chip 16-byte FIFO buffers) make serial I/O more reliable. By buffering data into 16-byte packets before putting it on the bus the UARTs drastically reduce the CPU load. This makes the PCL-746+ especially suitable for high speed serial I/O applications under MS Windows.