2-port RS-422/485 Cards with 3000 VDC isolation protection
  • Two independent RS-422/485 serial ports
  • Provides 3000 VDC isolation
  • 16C550 UARTs with on-chip 16-byte FIFO
  • Transmission speeds up to 921.6 kbps
  • I/O address and interrupt selectable
  • Wide IRQ selection: 3, 4, 5, 6, 7, 9, 10, 11, 12 or 15
  • Supports 2 wire or 4 wire operation
  • Supports Tx, Rx, RTS, and CTS signals
  • Automatic RS-485 data flow control or RTS control
  • Termination resistors jumper enable/disable
  • Space reserved for optional surge protection on data lines
  • Supports Windows® 98/2000/XP, Linux®
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The PCL-745 series card provides two RS-422/485 serial ports.Each port utilizes a 16C550 UART with an on-chip 16-byte FIFO buffer for reliable, high-speed serial I/O. The UART buffer divides data into 16-byte packets before sending them onto the bus. This drastically reduces the CPU load and avoids data loss due to failure to respond to the interrupt request in time. The UART is especially useful for high speed serial I/O under Windows. The PCL-745B card differs from the PCL-743B card in that the former uses on-board optical isolators to protect your PC and equipment against damages from ground loops, increasing system reliability in harsh environments.