美國國家儀器公司PXI-6238數(shù)字多功能輸入/輸出模塊

這鎳PXI-6238數(shù)字多功能I/O模塊(零件號(hào):779624-01)具有諸如存儲(chǔ)體隔離、16 AI (16位，1.25 MS/s)、2 AO、6 DI和4 DO等特性。源可以自動(dòng)校準(zhǔn)，以糾正位移和調(diào)整錯(cuò)誤。用戶可以調(diào)整小工具，以限制AI和執(zhí)行時(shí)由時(shí)間和溫度漂移引起的誤差。沒有外部電路是重要的；內(nèi)部參考保證了在一段時(shí)間和溫度變化后的高精度和堅(jiān)固性。

該型號(hào)的工廠校準(zhǔn)常數(shù)存儲(chǔ)在板載EEPROM中，不能更改。當(dāng)用戶自行調(diào)整小工具時(shí)，軟件會(huì)將新的常數(shù)存儲(chǔ)在EEPROM的客戶端可修改區(qū)域中。要將小工具恢復(fù)到其初始工業(yè)設(shè)施校準(zhǔn)設(shè)置，軟件可以將工廠校準(zhǔn)常數(shù)復(fù)制到EEPROM的客戶端可修改區(qū)域。

在這個(gè)模型中，傳感器可以產(chǎn)生電信號(hào)來量化物理現(xiàn)象，如溫度、力、聲音或光。一些常用的傳感器有應(yīng)變儀、熱電偶、熱敏電阻、rakish編碼器、直線編碼器和電阻溫度識(shí)別器(RTD)。

這倪PXI-6238 多功能輸入輸出模塊有一個(gè)模數(shù)轉(zhuǎn)換器(ADC)。多路復(fù)用器(MUX)通過NI-PGIA一次將一個(gè)AI通道路由至ADC。NI可編程增益儀器增強(qiáng)器(PGIA)是一種估算和儀器級(jí)增強(qiáng)器，它限制所有信息范圍的建立時(shí)間。NI-PGIA可以打開或減弱AI信號(hào)，以保證使用ADC的最大分辨率

National Instruments PXI-6238 Digital Multifunction I/O Module

The NI PXI-6238 Digital Multifunction I/O Module (Part Number: 779624-01) comes with features such as Bank Isolation, 16 AI (16 Bits, 1.25 MS/s), 2 AO, 6 DI, and 4 DO. Sourcing can auto-calibrate to correct displacement and adjust mistakes. The user can align the gadget to limit the AI and the errors caused by the drift of time and temperature at the time of execution. No outside circuit is vital; an inward reference guarantees high accuracy and solidness after some time and temperature changes.

Factory-calibration constants in this model are stored in an onboard EEPROM and cannot be changed. When the user self-adjusts the gadget, software stores new constants in a client modifiable area of the EEPROM. To restore a gadget to its initial industrial facility alignment settings, the software can duplicate the factory-calibration constants to the client modifiable area of the EEPROM.

In this model, sensors can produce electrical signals to quantify physical phenomena, such as temperature, force, sound, or light. Some regularly utilized sensors are strain gauges, thermocouples, thermistors, rakish encoders, straight encoders, and resistance temperature identifiers (RTDs).

The NI PXI-6238 Multifunction I/O Module has one analog- to-digital converter (ADC). The multiplexers (MUX) route one AI channel at a time to the ADC through the NI-PGIA. The NI programmable gain instrumentation intensifier (PGIA) is an estimation and instrument class intensifier that limits settling times for all information ranges. The NI-PGIA can open or lessen an AI signal to guarantee that the maximum resolution of the ADC is used.