通用输入模块 SCXI-1121 并行输出模式 和多路复用输出模式

SCXI-1121 SCXI通用输入模块

用于SCXI的4通道通用输入模块—SCXI-1121专为各种需要隔离的传感器和信号输入而设计。 它为每个通道提供独立可配置的隔离放大器、滤波器和激励源。 SCXI-1121可以采集应变、电阻温度检测器(RTD)、热电偶、毫伏、伏特和电流输入信号。 此外，SCXI‑1121的通道可多路复用数据采集设备的单个通道，您也可以通过添加模块来增加通道数。 SCXI‑1121还提供了并行模式运行。

。 NI SCXI-1121 模 块 具有 两种 输出 模式： 并行 输出 模式 和 多路 复用 输出 模式

。并行输出模式工作时，所有四个输入通道均并联至四个数据采集板通道。然而，多路复用输出模式工作时，所有四个通道多路复用到一个数据采集板通道中。

SCXI-1121 可 与 NI MIO-16 开发 板 配合 使用 。NI SCXI-1121 通用 输入 模 块 还 可 与 单 机 箱 SCXI 系统 中的 Lab-PC+ 板 卡 配合使用。虽然，Lab-PC+板卡不能控制具有多个机箱的SCXI系统。此外，Lab-NB、Lab-PC、Lab-LC和PC-LPM-16板卡可与SCXI-1121一起使用，但只能控制单机箱SCXI系统，并且无法在模块处于多路复用输出模式时扫描模块。在此模式下，这些板只能完成单通道读取。此外， 多个 NI SCXI 1121 模 块 可 多 路 复 用 到 一个 通道， 这 将 增加 可 数字化 的 模拟 输入 信号 量。

SCXI-1121使用NIDAQmx驱动程序软件运行，该软件可以使用软件包或应用开发环境（ADE）进行编程，如LabVIEW或LabWindows/CVI。NI 设备 重 23.5 盎司， 尺寸为 1.2 x 6.8 x 7.4 英寸。在物理维度上。

通用输入模块 SCXI-1121 并行输出模式 和多路复用输出模式

Scxi-1121 SCXI universal input module

4-channel universal input module for SCXI- The SCXI-1121 is designed for a wide range of sensor and signal inputs that require isolation. It provides individually configurable isolation amplifiers, filters and excitation sources for each channel. The SCXI-1121 can collect strain, resistance temperature detector (RTD), thermocouple, millivolt, volt and current input signals. In addition, the channels of SCXI‑1121 can multiplex individual channels of the data acquisition device, and you can also increase the number of channels by adding modules. SCXI‑1121 also provides parallel mode operation.

. The NI SCXI-1121 module has two output modes: parallel output mode and multiplexed output mode

. When working in parallel output mode, all four input channels are paralleled to four data acquisition board channels. However, when the multiplexed output mode works, all four channels are multiplexed into a single data acquisition board channel.

The SCXI-1121 can be used with the NI MIO-16 development board. The NI SCXI-1121 universal input module can also be used with Lab-PC+ board card in single-box SCXI system. Although, Lab-PC+ boards cannot control SCXI systems with multiple chassis. In addition, Lab-NB, Lab-PC, Lab-LC, and PC-LPM-16 boards can be used with the SCXI-1121, but can only control the single-box SCXI system and cannot scan the module when the module is in multiplexed output mode. In this mode, the boards can only perform single-channel reads. In addition, multiple NI SCXI 1121 modules can be multiplexed to a single channel, which increases the analog input semaphore that can be digitized.

The SCXI-1121 runs using NIDAQmx driver software, which can be programmed using a software package or application development environment (ADE) such as LabVIEW or LabWindows/CVI. The NI device weighs 23.5 ounces and measures 1.2 x 6.8 x 7.4 inches. In the physical dimension.

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