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PXI-5441
可重構(gòu)拓?fù)?br />如表1所示，一些PXI繼電器模塊可以重新配置以實(shí)現(xiàn)多種拓?fù)?br />在單個(gè)設(shè)備中，允許您選擇適合您的應(yīng)用程序的拓?fù)洹＠?br />PXIe-2569可以在軟件中重新配置，無需任何額外的硬件，允許您重塑
拓?fù)浞譃?00個(gè)SPST繼電器或50個(gè)DPST繼電器。
圖4：。PXI/PXIe-2569是PXI中繼模塊的一個(gè)示例，可以重新配置為100 SPST
繼電器或50 DPST繼電器。
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18頁| | PXI開關(guān)模塊
同步和集成
NI交換機(jī)使用PXI平臺(tái)的固有定時(shí)和同步功能進(jìn)行通信
PXI chassis1內(nèi)的其他儀器。您可以在內(nèi)存中存儲(chǔ)交換機(jī)連接列表
在交換機(jī)模塊上，然后使用集成硬件掃描和觸發(fā)引擎
推進(jìn)開關(guān)順序，并與任何能夠發(fā)送和
接收數(shù)字觸發(fā)器，如數(shù)字萬用表或示波器。此切換方法刪除
軟件開銷，并減少與傳統(tǒng)軟件控制交換相關(guān)的總線延遲
使用更多可重復(fù)的計(jì)時(shí)加快測(cè)試執(zhí)行的操作。
1.
大多數(shù)NI開關(guān)都有觸發(fā)功能。要檢查開關(guān)模塊是否支持此功能，請(qǐng)參考“觸發(fā)器
產(chǎn)品規(guī)范文件的“特性”部分。
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19頁| | PXI開關(guān)模塊
NI開關(guān)軟前面板
NI-SWITCH驅(qū)動(dòng)程序軟件包括一個(gè)交互式軟前面板，可實(shí)現(xiàn)全面的開箱即用功能。
此交互式軟前面板允許您配置交換機(jī)拓?fù)浜透慕粨Q機(jī)
只需單擊即可連接。此外，您可以使用調(diào)試驅(qū)動(dòng)程序會(huì)話模式來監(jiān)視和
在自動(dòng)測(cè)量期間調(diào)試開關(guān)。例如，您可以監(jiān)視哪些信號(hào)路徑是
激活，哪個(gè)繼電器打開/關(guān)閉，以及每個(gè)繼電器使用了多少次。
NI-SWITCH應(yīng)用程序編程接口（API）
除了軟前面板之外，NI-SWITCH驅(qū)動(dòng)程序還包括一個(gè)與
多種開發(fā)選項(xiàng)，如LabVIEW、C、C#等。驅(qū)動(dòng)程序還提供訪問
幫助文件、文檔和數(shù)十個(gè)可作為起點(diǎn)使用的現(xiàn)成裝運(yùn)示例
適用于您的應(yīng)用程序。
Reconfigurable Topologies As referenced in Table 1, some PXI Relay Modules can be reconfigured to achieve multiple topologies within a single device, allowing you to pick the topology that best suits your application. For example, the PXIe-2569 can be reconfigured in software, without any additional hardware, allowing you to reshape the topology into either 100 SPST relays or 50 DPST relays. Figure 4. The PXI/PXIe-2569 is one example of a PXI Relay Module that can be reconfigured into either 100 SPST relays or 50 DPST relays. Have a question? Contact Us Page 18 | ni.com | PXI Switch Modules Synchronization and Integration NI switches use the inherent timing and synchronization capabilities of the PXI platform to communicate with other instruments within the PXI chassis1. You can store a list of switch connections in memory onboard the switch module and then use the integrated hardware scanning and triggering engine to advance the switch sequence and rapidly communicate with any PXI instrument that can send and receive digital triggers, such as DMM or oscilloscope. This advanced switching method removes the software overhead and reduces the bus latency associated with traditional software-controlled switching operations for faster test execution with more repeatable timing. 1 Triggering is available on most NI switches. To check if this feature is supported by a switch module, reference the “Trigger Characteristics” section of the product specification document. Have a question? Contact Us Page 19 | ni.com | PXI Switch Modules NI-SWITCH Soft Front Panel The NI-SWITCH driver software includes an interactive soft front panel for full out-of-the-box functionality. This interactive soft front panel allows you to configure the switch topology and change switch connections with a simple click. In addition, you can use the Debug Driver Session mode to monitor and debug the switch during automated measurement. For example, you can monitor which signal paths are active, which individual relays are open/closed, and how many times each relay has been used. NI-SWITCH Application Programming Interface (API) In addition to the soft front panel, the NI-SWITCH driver includes a best-in-class API that works with a variety of development options such as LabVIEW, C, C#, and others. The driver also provides access to help files, documentation, and dozens of ready-to-run shipping examples you can use as a starting point for your application.
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