PCL-741-AE, 2-port Isolated RS-232/current-Loop Interface Card

The PCL-741 provides two isolated RS-232 or current-loop serial ports.You can configure each port individually to RS-232 or current-loop using on-board jumpers. The card has two 16C550 UARTs with on-chip 16-byte FIFO buffers. The UARTs buffer data into 16-byte packets before putting it on the bus. This drastically reduces CPU load and avoids data loss when the system is busy and cannot process the interrupt quickly. These FIFO buffers make the PCL-741 especially suitable for high speed serial I/O under Windows.