SCXI-1125  |   电压输入模块  | 具有双重绝缘 II 类操作隔离

　　National Instruments SCXI-1125 电压输入模块

　　NI SCXI-1125 电压 输入 模 块 (部件号： 776872-25) 为 每个 模拟 输入 通道 提供 300 Vrms 工作 隔离 和 低通 滤波 功能。其架构非常适合毫伏源、伏源、0 至 20 mA、4 至 20 mA 和热电偶的增强和限制。SCXI-1125 可以将其 8 个通道多路复用到 DAQ 小工具的单个通道中，同时还允许用户添加模块以扩展通道数。该模块还提供并行模式操作，以扩展输出能力。

　　NI SCXI-1125 包含 校准 硬件， 可 使 错误 源 无效。通过可编程失调校准，软件可编程模拟开关将每个仪表增强器的输入接地，以进行失调误差校准。本地可用的EEPROM将每个输入扩展的每个通道的校准常数存储在客户端特征区中。EEPROM还将工厂校准常数的排列存储在永久存储器中，该常数无法更改。NI- DAQ 驱动 软件 可 直接 利用 校准 常 数 来 验证 增益 和 失调 误差。该器件的输出范围为 ±5.0 V，重量为 22.6 盎司。它的尺寸为：7.4 x 6.8 x 1.2 英寸。

　　在此型号中，每个通道都包含一个自动低通滤波器，用户可以将其配置为 4 Hz 或 10 kHz。使用SCXI-1125，用户可以执行不规则扫描，这意味着他们可以只选择需要从中挑选信息的通道，然后按任意顺序扫描通道。每个通道都独立限制在通道之间或通道对地之间具有300 Vrms的工作共模电压。此外，SCXI-1125 还通过了 CE 认证，具有双重绝缘 II 类操作隔离。

　　需要NI-DAQmx 9.0 (或更高版本)驱动程序软件来配置和编程SCXI-1125。此外，该器件还兼容以下任一应用开发环境(ADE)：LabVIEW、LabWindows/CVI、Measurement Studio。可以使用Measurement & Automation Explorer工具配置设备软件。.

　　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.