SCXI-1125 | 電壓輸入模塊 | 具有雙重絕緣 II 類操作隔離
National Instruments SCXI-1125 電壓輸入模塊
NI SCXI-1125 電壓 輸入 模 塊 (部件號(hào)： 776872-25) 為 每個(gè) 模擬 輸入 通道 提供 300 Vrms 工作 隔離 和 低通 濾波 功能。其架構(gòu)非常適合毫伏源、伏源、0 至 20 mA、4 至 20 mA 和熱電偶的增強(qiáng)和限制。SCXI-1125 可以將其 8 個(gè)通道多路復(fù)用到 DAQ 小工具的單個(gè)通道中，同時(shí)還允許用戶添加模塊以擴(kuò)展通道數(shù)。該模塊還提供并行模式操作，以擴(kuò)展輸出能力。
NI SCXI-1125 包含 校準(zhǔn) 硬件， 可 使 錯(cuò)誤 源 無(wú)效。通過(guò)可編程失調(diào)校準(zhǔn)，軟件可編程模擬開關(guān)將每個(gè)儀表增強(qiáng)器的輸入接地，以進(jìn)行失調(diào)誤差校準(zhǔn)。本地可用的EEPROM將每個(gè)輸入擴(kuò)展的每個(gè)通道的校準(zhǔn)常數(shù)存儲(chǔ)在客戶端特征區(qū)中。EEPROM還將工廠校準(zhǔn)常數(shù)的排列存儲(chǔ)在永久存儲(chǔ)器中，該常數(shù)無(wú)法更改。NI- DAQ 驅(qū)動(dòng) 軟件 可 直接 利用 校準(zhǔn) 常 數(shù) 來(lái) 驗(yàn)證 增益 和 失調(diào) 誤差。該器件的輸出范圍為 ±5.0 V，重量為 22.6 盎司。它的尺寸為：7.4 x 6.8 x 1.2 英寸。
在此型號(hào)中，每個(gè)通道都包含一個(gè)自動(dòng)低通濾波器，用戶可以將其配置為 4 Hz 或 10 kHz。使用SCXI-1125，用戶可以執(zhí)行不規(guī)則掃描，這意味著他們可以只選擇需要從中挑選信息的通道，然后按任意順序掃描通道。每個(gè)通道都獨(dú)立限制在通道之間或通道對(duì)地之間具有300 Vrms的工作共模電壓。此外，SCXI-1125 還通過(guò)了 CE 認(rèn)證，具有雙重絕緣 II 類操作隔離。
需要NI-DAQmx 9.0 (或更高版本)驅(qū)動(dòng)程序軟件來(lái)配置和編程SCXI-1125。此外，該器件還兼容以下任一應(yīng)用開發(fā)環(huán)境(ADE)：LabVIEW、LabWindows/CVI、Measurement Studio?？梢允褂肕easurement & Automation Explorer工具配置設(shè)備軟件。.
National Instruments SCXI-1125 Voltage input module
The NI SCXI-1125 voltage input module (Part number: 776872-25) provides 300 Vrms operating isolation and low-pass filtering for each analog input channel. Its architecture is ideal for the enhancement and limitation of millivolt sources, voltages, 0 to 20 mA, 4 to 20 mA, and thermocouples. The SCXI-1125 can multiplex its eight channels into a single channel of the DAQ gadget, while also allowing users to add modules to expand the number of channels. The module also provides parallel mode operation to extend the output capability.
The NI SCXI-1125 includes calibration hardware that invalidates error sources. With programmable offset calibration, a software-programmable analog switch ground the input to each meter enhancer for offset error calibration. The locally available EEPROM stores the calibration constant for each channel of each input extension in the client signature area. The EEPROM also stores the arrangement of the factory calibration constant in permanent memory, which cannot be changed. The NI-DAQ driver software can verify the gain and offset error directly using the calibration constants. The device has an output range of ± 5.0V and weighs 22.6 ounces. It measures 7.4 x 6.8 x 1.2 inches.
In this model, each channel contains an automatic low-pass filter that the user can configure to either 4 Hz or 10 kHz. With SCXI-1125, users can perform irregular scans, which means they can select only the channels from which they need to pick information, and then scan the channels in any order. Each channel is independently limited to an operating common-mode voltage of 300 Vrms between channels or between channels to ground. In addition, the SCXI-1125 is CE certified with dual insulation Class II operating isolation.
NI-DAQmx 9.0 (or later) driver software is required to configure and program SCXI-1125. In addition, the device is compatible with any of the following application development environments (ades) : LabVIEW, LabWindows/CVI, Measurement Studio. Device software can be configured using the Measurement & Automation Explorer tool.
