主要特点

4个独立的rs-422/485串行端口

传输速率可达921.6 kbps

4个串口使用单独或共享的irq

多个irq可供选择：3, 4, 5, 6, 7, 9, 10, 11, 12 或 15
supports standard dos com1, com2, com3, and com4
支持标准：dos com1, com2, com3, 和 com4
provides 1000 vdc isolation
provides 2000 vdc surge protection (pcl-846b only)
sPACe reserved for termination resistors
supports 2 wire or 4 wire operation
supports tx, rx, rts, and cts signals
automatic rs-485 data flow control or rts control
supports windows? 98/2000/xp, linux?
powerful and easy-to-use utility (icom tools)



内容介绍


the pcl-846 series cards provide four independent rs-422/485 serial ports on a card. each port has a 16c550 uart with an on-chip 16-byte fifo buffer for reliable, high-speed serial i/o. the uart buffers data into 16-byte packets before putting it on the bus. this drastically reduces the cpu load and avoids data loss when the system is busy and cannot process the interrupt quickly. the uart is especially useful for high speed serial i/o under windows.