這鎳PXI-2521 PXI繼電器模塊(零件號:778572-21)具有過溫條件，當(dāng)過高的功率在通道路由中耗散時，例如當(dāng)改變由電容性或電感性負(fù)載的切換產(chǎn)生的膨脹脈沖時，或者當(dāng)信號改變的速率比模塊耗散所產(chǎn)生的熱量的速率快時，就會產(chǎn)生過溫條件。這PXI-2521開關(guān)模塊提供40個獨立的DPST繼電器，2個開關(guān)/一個載體，150 V的最大電壓，它是完全軟件編程。

NI交換機健康中心并入PXI-2521；這是一個與NI-SWITCH驅(qū)動程序一起安裝的免費應(yīng)用程序，可用于篩選單個繼電器的健康狀況，指導(dǎo)繼電器更換，并生成客戶報告。NI Switch Health Center通過混合路由發(fā)送信號來檢查每條總線的狀態(tài)，并在繼電器斷開或關(guān)閉時提醒客戶。此外，一段時間后接觸電阻的巨大變化可以表明繼電器接近或已經(jīng)達到壽命終點。NI Switch Health Center利用集成的繼電器電阻測試來測試電阻變化，使用戶能夠看到單個繼電器上的電阻橫向變化，并確定繼電器是否接近其使用壽命的終點。電阻相對于基線的顯著變化表明用戶將很快需要替換繼電器。

如果你對這種型號感興趣，并想了解更多關(guān)于它的選項、特點和規(guī)格，你可以閱讀它的手冊，可在ApexWaves.com網(wǎng)站上找到。

The NI PXI-2521 PXI Relay Module (Part Number: 778572-21) has over-temperature conditions that are made when exorbitant power dissipates in channel routes, such as while changing expansive impulses created by switching in capacitive or inductive loads or when a signal is changed at a quicker rate than the module dissipates the heat produced. The PXI-2521 Switch Module offers 40 independent DPST relays, 2 A switching / A carry, 150 V of maximum voltage and it is fully software programmable.

The NI Switch Health Center is incorporated in the PXI-2521; this is a free application that installs with the NI-SWITCH driver that can be utilized to screen individual relay health, guide relay replacement, and produce client reports. The NI Switch Health Center checks the state of each bus by sending a signal through a mix of routes and cautioning clients if a relay has failed stuck open or shut. Furthermore, huge changes in contact resistance after some time can demonstrate that a relay is approaching or has achieved end of life. The NI Switch Health Center tests for changes in resistance utilizing the incorporated relay resistance test, enabling the user to see the resistance change crosswise over individual relays and decide if the relay is nearing the finish of its usable life. A substantial change in resistance from the baseline shows that the user will soon need to supplant the relay.

If you are interested in this model and you want to learn more about its options, special features, and specifications, you can read its manual, which is available on the ApexWaves.com website.