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(hào)： 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(gè)異步接口，用于通過(guò)串行端口與儀器進(jìn)行通信。此型號(hào)與 Microsoft 2000、NT、XP、Me 和 9x 具有即插即用兼容性。因此，它帶來(lái)了自動(dòng)配置的優(yōu)勢(shì)，可實(shí)現(xiàn)無(wú)憂(yōu)安裝。該設(shè)備可以很容易地從用戶(hù)當(dāng)前的應(yīng)用程序(如Visual Basic，Excel Visual，C++等)安裝為標(biāo)準(zhǔn)串行端口。

　　此型號(hào)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(biāo)準(zhǔn)引腳排列相結(jié)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(zhuǎn)換為 DB-25 或 DB-9 公連接器，使用可單獨(dú)購(gòu)買(mǎi)的轉(zhuǎn)換器電纜。

　　NI PXI-8423/2 提供 了 高級(jí) 功能， 如 通用 PCI、高達(dá) 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(hù)將能夠與以 0.01% 以?xún)?nèi)的標(biāo)準(zhǔn)波特率運(yùn)行的設(shè)備進(jìn)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(biāo)準(zhǔn)波特率運(yùn)行的設(shè)備進(jìn)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(hù)能夠利用最新的PC技術(shù)。該接口器件提供增強(qiáng)的串行驅(qū)動(dòng)器，可實(shí)現(xiàn)輕松配置、高級(jí)性能和訪問(wèn)所有高級(jí)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.