4端口，隔离，RS485/RS422 PXI串行接口模块—PXI‑8433/4是一款用于与RS485和RS422设备进行高速端口‑端口隔离通信的高性能工业接口。 它具有高性能DMA传输、多线程和多处理器支持。 用户可选择4线或2线收发器模式来实现全双工或半双工通信。 NI串行接口也可作为标准COM端口，以便兼容使用串行通信的程序。
NI PXI8433 数据采集卡
技术资料下载：
PXI8433手册
Features:
- Supports RS-422 and RS-485 Serial Protocols
- Offers Port-PC Isolation and Port-Port Isolation
- 10-Position I/O Modular Connector
The National Instruments PXI-8433 RS485/RS422 High-Performance, Isolated Multi-Port Serial Interface series are high-performance industrial interface for high-speed, port-to-port isolated communication with RS485 and RS422 devices. It features high-performance DMA transfers, multithreading, and multiprocessor support. You can also select between 4- and 2-wire transceiver modes for full- and half-duplex communication. NI serial interfaces also appear as standard COM ports for compatibility with programs that use serial communications.
