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PXI-6528
機箱的主要功能經(jīng)過設計和驗證，可滿足或超過對功率要求高的PXI模塊的冷卻要求。PXI Express電源規(guī)格要求每個外圍插槽的可用功率至少為30 W，并且每個插槽可以散發(fā)相同的熱量。NI設計的PXI Express機箱超過了PXI Express的要求，為每個外圍插槽提供了至少38.25 W的電源和冷卻；一些機箱進一步提高了插槽的冷卻能力，可以為單個插槽提供58 W或82 W的冷卻。這種額外的電源和冷卻使高性能模塊（如數(shù)字化儀、高速數(shù)字輸入/輸出和射頻模塊）的功能在可能需要連續(xù)采集或高速測試的應用中成為可能。機箱的總系統(tǒng)功率各不相同，因此在配置新系統(tǒng)時，始終建議執(zhí)行系統(tǒng)級功率預算。10BAll混合插槽選項您可以在PXIe-1084機箱中插入PXI Express和混合兼容PXI模塊，因為所有17個外圍插槽都是混合插槽，以實現(xiàn)大的儀器放置靈活性。如表1所示，所有NI PXI Express機箱都至少有幾個混合插槽，但其中一些插槽針對此用例進行了優(yōu)化。圖1：。PXIe-1084具有17個混合外圍插槽。1BAcoustics即使具有先進的冷卻能力，NI PXI底盤的設計也可將整個系統(tǒng)的聲發(fā)射降至低，這對于臺式驗證環(huán)境尤為重要。PXIe-1084、PXIe-1092和PXIe-1095在其典型的38 W冷卻模式中是NI安靜的機箱，聲壓級僅為34-38 dBA，比其他供應商的大型機箱低2倍多。將風扇速度控制、使用的風扇類型和風扇安裝方法相結(jié)合，可以實現(xiàn)冷卻優(yōu)化，同時將發(fā)出的噪音降至低。NI在其許多PXI機箱中采用脈寬調(diào)制（PWM）風扇，以比傳統(tǒng)電壓控制風扇進一步減少聲發(fā)射。風扇的PWM信號控制允許NI機箱設計者使用更大范圍的風扇RPM設置，從而可以微調(diào)機箱的聲發(fā)射和冷卻性能。

Key Features 9BCooling NI chassis are designed and validated to meet or exceed the cooling requirements for the most powerdemanding PXI modules. The PXI Express power specification requires a minimum of 30 W of power be available to each peripheral slot and that each slot can dissipate that same amount of heat. PXI Express Chassis designed by NI exceed PXI Express requirements by providing at least 38.25 W of power and cooling to every peripheral slot; some chassis push slot cooling capacity even further and can provide 58 W or 82 W of cooling to a single slot. This extra power and cooling makes advanced capabilities of high-performance modules, such as digitizers, high-speed digital I/O, and RF modules, possible in applications that may require continuous acquisition or high-speed testing. Chassis vary in total system power, so it is always recommended to perform a system-level power budget when configuring a new system. 10BAll-Hybrid Slot Options You can insert both PXI Express and hybrid-compatible PXI modules in the PXIe-1084 chassis because all 17 peripheral slots are hybrid slots for maximum instrument placement flexibility. As seen in Table 1, all NI PXI Express chassis feature at least a few hybrid slots, but some are more optimized for this use case than others. Figure 1. The PXIe-1084 features 17 hybrid peripheral slots. 1BAcoustics Even with their advanced cooling capabilities, NI PXI chassis are designed to minimize the overall system acoustic emissions, which is particularly important for benchtop validation environments. The PXIe-1084, PXIe-1092, and PXIe-1095 are NI’s quietest chassis in their typical 38 W cooling profiles, with sound pressure levels in the range of only 34-38 dBA, more than 2x quieter than other vendors’ large chassis. Combining fan speed control, the type of fan used, and fan mounting method makes cooling optimization possible while minimizing the acoustic noise emitted. NI implements pulse-width modulated (PWM) fans in many of its PXI chassis to reduce acoustic emissions further than that of traditional voltage-controlled fans. PWM signal control of the fan permits the NI chassis designer to use a wider range of the fan’s RPM settings, thus making it possible to fine tune the chassis’ acoustic emissions and cooling performance.