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PXI-5650
可重構拓撲
如表1所示，一些PXI繼電器模塊可以重新配置以實現多種拓撲
在單個設備中，允許您選擇適合您的應用程序的拓撲。例如
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
拓撲分為100個SPST繼電器或50個DPST繼電器。
圖4：。PXI/PXIe-2569是PXI中繼模塊的一個示例，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開關模塊
同步和集成
NI交換機使用PXI平臺的固有定時和同步功能進行通信
PXI chassis1內的其他儀器。您可以在內存中存儲交換機連接列表
在交換機模塊上，然后使用集成硬件掃描和觸發(fā)引擎
推進開關順序，并與任何能夠發(fā)送和
接收數字觸發(fā)器，如數字萬用表或示波器。此切換方法刪除
軟件開銷，并減少與傳統(tǒng)軟件控制交換相關的總線延遲
使用更多可重復的計時加快測試執(zhí)行的操作。
1.
大多數NI開關都有觸發(fā)功能。要檢查開關模塊是否支持此功能，請參考“觸發(fā)器
產品規(guī)范文件的“特性”部分。
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19頁| | PXI開關模塊
NI開關軟前面板
NI-SWITCH驅動程序軟件包括一個交互式軟前面板，可實現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拓撲和更改交換機
只需單擊即可連接。此外，您可以使用調試驅動程序會話模式來監(jiān)視和
在自動測量期間調試開關。例如，您可以監(jiān)視哪些信號路徑是
激活，哪個繼電器打開/關閉，以及每個繼電器使用了多少次。
NI-SWITCH應用程序編程接口（API）
除了軟前面板之外，NI-SWITCH驅動程序還包括一個與
多種開發(fā)選項，如LabVIEW、C、C#等。驅動程序還提供訪問
幫助文件、文檔和數十個可作為起點使用的現成裝運示例
適用于您的應用程序。
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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