PXI-8423  |    具有即插即用兼容性  |  連接器

　　National Instruments PXI-8423/2 RS-485 接口

　　National Instruments PXI-8423/2 (部件號： 777737-02) 具有 64B FIFO、460.8 (kb/s) 傳輸速率和光隔離， 是 用于 PXI 的 RS-485 接口。它是一個異步接口，用于通過串行端口與儀器進行通信。此型號與 Microsoft 2000、NT、XP、Me 和 9x 具有即插即用兼容性。因此，它帶來了自動配置的優(yōu)勢，可實現(xiàn)無憂安裝。該設備可以很容易地從用戶當前的應用程序(如Visual Basic，Excel Visual，C++等)安裝為標準串行端口。

　　此型號提供 2 端口和 4 端口配置。在 2 端口配置 DB-9 中，公連接器與 RS232 和 RS485 連接器的標準引腳排列相結合。NI PXI-8423 的 4 端口 版本 配備 模塊化 的 10 位 電話 插孔。但是，這些電話插孔可以轉換為 DB-25 或 DB-9 公連接器，使用可單獨購買的轉換器電纜。

　　NI PXI-8423/2 提供 了 高級 功能， 如 通用 PCI、高達 2 Mb/s 的 靈活 波特率 以及 多 處理器 和 超 線程 兼容性。使用此模型，用戶將能夠與以 0.01% 以內(nèi)的標準波特率運行的設備進行通信。此外，它還允許與在 57 b/s 至 2 Mb/s 范圍內(nèi)以非標準波特率運行的設備進行通信。為了提高效率和速度，PXI-8423/2的超線程和多處理器兼容性使用戶能夠利用最新的PC技術。該接口器件提供增強的串行驅動器，可實現(xiàn)輕松配置、高級性能和訪問所有高級收發(fā)器控制模式。

　　National Instruments PXI-8423/2 RS-485 interface

　　The National Instruments PXI-8423/2 (Part number: 777737-02) features a 64B FIFO, 460.8 (kb/s) transfer rate and optical isolation, and is an RS-485 interface for PXI. It is an asynchronous interface for communicating with instruments via serial ports. This model has plug-and-play compatibility with Microsoft 2000, NT, XP, Me, and 9x. Therefore, it brings the advantage of automatic configuration for worry-free installation. The device can be easily installed from the user's current application (such as Visual Basic, Excel Visual, C++, etc.) as a standard serial port.

　　This model is available in 2-port and 4-port configurations. In the 2-port configuration DB-9, the male connector is combined with the standard pin arrangement of the RS232 and RS485 connectors. The 4-port version of the NI PXI-8423 is equipped with a modular 10-bit telephone jack. However, these phone jacks can be converted to DB-25 or DB-9 male connectors using converter cables that can be purchased separately.

　　The NI PXI-8423/2 offers advanced features such as universal PCI, flexible baud rates up to 2 Mb/s, and multi-processor and hyper-threading compatibility. Using this model, users will be able to communicate with devices operating at standard baud rates within 0.01%. In addition, it allows communication with devices operating at non-standard baud rates in the range of 57 b/s to 2 Mb/s. To increase efficiency and speed, the PXI-8423/2's hyper-threading and multiprocessor compatibility enables users to take advantage of the latest PC technology. This interface device provides enhanced serial drivers for easy configuration, advanced performance and access to all advanced transceiver control modes.