描述
产品定位与功能
NI cDAQ-9172是CompactDAQ机箱的核心控制器，采用模块化设计，支持多种C系列I/O模块接入，适用于工业自动化、振动分析及多传感器数据采集场景。其核心优势在于高通道密度与跨平台兼容性（同一模块可无缝迁移至Compact RIO或USB DAQ系统）。
核心参数与接口
机箱特性
-插槽数量：8通道扩展槽（支持混合配置C系列模块）；
-同步能力：通过星形触发总线实现多机箱同步（精度<100 ns）；
-供电模式：支持外部电源（100–240 VAC）或USB总线供电。
通信接口
-主控接口：USB 3.0（理论带宽5 Gbps）；
-扩展支持：兼容以太网载体（如ENET-9163）及无线载体（WLS-9163）。
支持的C系列模块
下表列举主要兼容模块（完整列表参考NI官方数据库）：
1.模拟输入模块
|型号|通道数|采样模式|分辨率|测量范围|最大采样率|特点||NI 9211*+†‡|4|慢速采样|24 bit|±80 mV（热电偶）|14 S/s|隔离输入，支持冷端补偿|
|NI 9215*+†‡|4|同步采样|16 bit|±10 V|100 kS/s/ch|高速并行采集|
|NI 9229*|4|同步采样|24 bit|±60 V（通道间隔离）|50 kS/s/ch|高电压差分输入|
|NI 9234*†‡|4|同步采样|24 bit|±5 V（IEPE传感器）|51.2 kS/s/ch|DSA技术，内置信号调理|
|NI 9237*†‡|4|同步采样|24 bit|±25 mV/V（应变桥）|50 kS/s/ch|桥式传感器激励与测量集成|
2.模拟输出模块
|型号|通道数|输出类型|分辨率|最大更新率|
|NI 9263*|4|电压|16 bit|100 kS/s/ch|
|NI 9265|4|电流|16 bit|100 kS/s/ch|
3.数字I/O模块
|型号|通道数|信号类型|最大数据率|隔离能力|
|NI 9401|8|5V TTL|10 MHz|无|
|NI 9421*|8|24V输入（sinking）|10 kHz|无|
|NI 9472*|8|24V输出（sourcing）|10 kHz|无|
技术特点
模块化扩展
-单机箱支持混合配置不同I/O类型（如热电偶+高电压通道）；
-模块即插即用（无需固件更新或驱动冲突处理）。
信号完整性优化
-通道间隔离电压达600 V（如NI 9211模块）；
-内置抗混叠滤波（针对扫描模式模块）。
软件生态
-兼容NI-DAQmx驱动（支持Python、MATLAB等语言）；
-提供LabVIEW例程库（快速部署振动分析、DAQ任务）。
Product Positioning and Functions
NI cDAQ-9172 is the core controller of CompactDAQ chassis.It adopts a modular design and supports the access of a variety of C series I/O modules.It is suitable for industrial automation,vibration analysis and multi-sensor data acquisition scenarios.Its core advantage lies in high channel density and cross-platform compatibility(the same module can be seamlessly migrated to Compact RIO or USB DAQ systems).
Core parameters and interfaces
Chassis features
-Number of slots:8 channel expansion slots(supports hybrid configuration C-series modules);
-Synchronization capability:Multi-chassis synchronization is achieved through star trigger bus(precision<100 ns);
-Power supply mode:Supports external power supply(100–240 VAC)or USB bus power supply.
Communication interface
-Main control interface:USB 3.0(theoretical bandwidth 5 Gbps);
-Extended support:compatible with Ethernet carriers(such as ENET-9163)and wireless carriers(WLS-9163).
Supported C series modules
The following table lists the main compatible modules(refer to the official NI database for the complete list):
1.Analog input module
|Model|Number of channels|Sampling mode|Resolution|Measurement range|Maximum sampling rate|Features||NI 9211*+†‡|4|Slow sampling|24 bit|±80 mV(thermocouple)|14 S/s|Isolated input,cold junction compensation supported|
|NI 9215*+†‡|4|Synchronous Sampling|16 bit|±10 V|100 kS/s/ch|High-speed Parallel Acquisition|
|NI 9229*|4|Synchronous Sampling|24 bit|±60 V(Channel Isolation)|50 kS/s/ch|High Voltage Differential Input|
|NI 9234*†‡|4|Synchronous Sampling|24 bit|±5 V(IEPE Sensor)|51.2 kS/s/ch|DSA technology,built-in signal conditioning|
|NI 9237*†‡|4|Synchronous Sampling|24 bit|±25 mV/V(strain bridge)|50 kS/s/ch|Bridge Sensor Excitation and Measurement Integration|
2.Analog output module
|Model|Number of channels|Output type|Resolution|Maximum update rate|
|NI 9263*|4|Voltage|16 bit|100 kS/s/ch|
|NI 9265|4|Current|16 bit|100 kS/s/ch|
3.Digital I/O module
|Model|Number of channels|Signal type|Maximum data rate|Isolation capability|
|NI 9401|8|5V TTL|10 MHz|None|
|NI 9421*|8|24V input(sinking)|10 kHz|None|
|NI 9472*|8|24V output(sourcing)|10 kHz|None|
Technical Features
Modular extension
-Single chassis supports mixed configurations of different I/O types(such as thermocouple+high voltage channels);
-Module plug and play(no firmware update or driver conflict handling required).
Signal integrity optimization
-The channel isolation voltage is up to 600 V(such as the NI 9211 module);
-Built-in anti-aliasing filtering(for scan mode module).
Software Ecology
-Compatible with NI-DAQmx driver(supports languages such as Python,MATLAB);
-Provides LabVIEW routine library(rapid deployment of vibration analysis,DAQ tasks).
