产品介绍：
通用PCI总线2路隔离RS-485/RS-422通讯卡
Built-in COM-Selector
Self-Tuner Inside
Up to 128 KB software FIFO for each COM port under Windows
Short Card Design
Supports 3.3 V/5 V PCI bus, Plug and Play
Provides 2-port RS-422/485
+/-4 kV ESD Protection
LED diagnostic indicators
[VXC-142iU only]
3 kV Isolated ports
