NI cDAQ-9171 C Series Sensor Test Portable USB IO Module

The NI cDAQ-9171 is the smallest and most portable single-slot USB chassis in the National Instruments (now part of Emerson) CompactDAQ platform, designed for single-module data acquisition scenarios. This chassis uses a bus-powered architecture, requiring only a single USB 2.0 Hi-Speed ​​cable for both data transfer and power supply, eliminating the need for an external power adapter. It is the only model in the entire cDAQ series that does not require an external power supply (NI cDAQ-9171 product page). The chassis integrates the NI-STC3 third-generation system timing controller ASIC, providing four 32-bit general-purpose counters/timers, six high-performance data streams, and flexible trigger routing capabilities.

Product number 781425-01. The core competitive advantages of the cDAQ-9171 C Series Sensor Test Portable USB IO Module lie in its ultra-small size (131.4 × 88.6 × 33.3 mm, 353 g), plug-and-play USB connectivity, compatibility with the full range of C-series modules, and a rugged design covering an industrial-grade operating temperature range of -20°C to 55°C. For laboratory, field testing, and portable data logging applications requiring single-channel sensor measurements, the cDAQ-9171 offers a solution with minimal system complexity and maximum deployment flexibility.

Product Description from the Supplier

Xi'an Mingxi Taida Information Technology Co., Ltd. brings over 12 years of industry expertise to deliver cutting-edge measurement and control solutions.With progressed computerization forms and strict quality control, we guarantee each item meets the most noteworthy guidelines for proficient applications.

Description

The NI cDAQ-9171 is a bus-powered, single-slot CompactDAQ USB chassis positioned as an entry-level data acquisition platform for small, portable sensor measurement systems. As the most compact member of the CompactDAQ product family, the cDAQ-9171 C Series Sensor Test Portable USB IO Module condenses over thirty years of NI's data acquisition technology into a palm-sized package, providing engineers and scientists with an extremely simple path from sensor to data.

Key Values of the NI cDAQ-9171

• The cDAQ-9171 is the smallest 1-slot USB chassis in the CompactDAQ series, product number 781425-01, positioned as an entry-level single-module system
• Employs NI-STC3 technology, supporting USB bus power delivery, eliminating the need for an external power supply and greatly simplifying portable deployment
• Supports hot-swapping, flexible trigger routing, and hazardous location certification, making it suitable for industrial sites and harsh environments
• Comes with NI-DAQmx drivers, supporting multiple programming environments including LabVIEW, Python, C/C++, and C#/.NET, and can also be used with FlexLogger for programming-free data acquisition
• Together with the cDAQ-9174 (4-slot) and cDAQ-9178 (8-slot), it forms a complete product tier to meet different channel count requirements

Key Features of the cDAQ-9171

• USB Bus Power Supply Architecture

The most differentiating feature of the cDAQ-9171 is its pure USB bus-powered design. Unlike the multi-slot chassis in the same series (cDAQ-9174/9178 require an external 9-30 VDC power supply), the cDAQ-9171 draws its operating power entirely from the USB port, with a maximum power consumption of 2.5 W (5 V × 500 mA) and only 2.5 mA in suspend mode. This means that users can directly connect it to the USB port of a laptop and perform data acquisition in environments without AC power, greatly expanding the convenience of field applications. Note: If connected via a USB hub, the hub must have external power supply capability.

• NI-STC3 Technology and Multi-timing Engine

The cDAQ-9171's built-in NI-STC3 (Third Generation System Timing Controller) is a proprietary NI ASIC, designed based on 30 years of experience in PC-based instrument development. The core advantage of the NI-STC3 lies including:

Four advanced 32-bit counters/timers: Each counter has an embedded auxiliary counter, enabling advanced frequency measurements with fewer clock sources. It supports measurement modes such as edge counting, pulse width, half-cycle, period, and dual-edge separation. Multi-base clock options: The internal base clock provides three ranges: 80 MHz, 20 MHz, and 100 kHz. The external base clock supports 0-20 MHz input, with a base clock accuracy of 50 ppm. Frequency generator: An independent 1-channel frequency generator with base clocks of 20 MHz / 10 MHz / 100 kHz, a division ratio of 1-16 (integer), and output to any module's PFI terminal.

• NI Signal Flow Technology

The cDAQ-9171 C Series Sensor Test Portable USB IO Module employs NI's patented Signal Streaming technology, enabling the USB 2.0 bus to support high-speed, bidirectional, multi-channel parallel data transfer (NI CompactDAQ Technology White Paper). The system provides six high-performance data streams, simultaneously transmitting analog inputs, analog outputs, digital inputs, digital outputs, counter/timer inputs/outputs, and NI-XNET (CAN/LIN) data. Unlike ordinary USB devices that only support one or two unidirectional data streams, Signal Streaming technology allows the cDAQ-9171 to maintain parallel data transfer for multiple measurement tasks with minimal processor involvement.

The cDAQ-9171 Features a Single-Slot, USB Bus-Powered Design

The cDAQ-9171 is positioned as the smallest and most portable entry-level model in the CompactDAQ USB chassis series. Among the entire CompactDAQ chassis lineup, the cDAQ-9171 is the only single-slot USB chassis, forming a complete product hierarchy with the four-slot cDAQ-9174, eight-slot cDAQ-9178, and fourteen-slot cDAQ-9179.

"Minimum Necessary System" – Only the core data acquisition function is retained, while advanced features such as multi-slot configurations, external triggers, and TSN synchronization are removed

• Extremely compact: 131.4 × 88.6 × 33.3 mm, only 353 g, easily fits into a toolbox or laptop bag
• Zero external dependence: USB bus power eliminates the need for an external power source

This design is particularly suitable for the following users: engineers who need to add a single-channel measurement point to an existing large DAQ system, researchers who need to frequently move measurement locations, and startups with limited budgets but requiring NI ecosystem compatibility.

Functions of the cDAQ-9171

• Analog Input Function

The cDAQ-9171's analog input functionality is achieved by inserting a C-series analog input module. The chassis provides the following analog input infrastructure.

Input FIFO: 127 sampling depth, ensuring no data loss during high-speed acquisition, timing accuracy: 50 ppm sampling rate accuracy (excluding group delay), timing resolution: 12.5 ns, driven by an 80 MHz base clock, maximum sampling rate: Determined by the installed C-series module (e.g., 1 MS/s/ch with NI-9223), number of channels: Determined by the C-series module (up to 32 channels per module).

The analog input supports the following triggering functions: Start Trigger, Reference Trigger, Pause Trigger, Sample Clock, and Sample Clock Timebase.

• Analog Output Function

The cDAQ-9171's analog output function supports both hardware timing and non-hardware timing modes:

• Digital I/O Functions

The cDAQ-9171 provides digital waveform acquisition and generation capabilities through C-series digital modules.

Waveform Acquisition (DI) FIFO: 511 samples in parallel module, 63 samples in serial module, Waveform Generation (DO) FIFO: 2,047 samples in parallel module, 63 samples in serial module, Digital Sampling Clock Frequency: 0-10 MHz (Limited Acquisition/Regeneration Mode), Timing Accuracy: 50 ppm.

The module's PFI (Programmable Function Interface) terminals support static digital input/output and timing input/output, with a timing input/output frequency range of 0-20 MHz. It can route timing signals from various analog inputs, analog outputs, counters, and digital I/O.

• Counter/Timer Function

The cDAQ-9171 has four built-in 32-bit general-purpose counters/timers, which need to be accessed through an installed hardware timing digital C-series module (such as the NI-9401/9402)

Measurement type:​​​​​​​ Edge Counting, Pulse, Semi-Period, Period, Two-Edge Separation, Pulse Width

Position measurement: X1, X2, X4 orthogonal coding (including Channel Z overload), Dual-pulse coding

Output Applications: Pulse Output,Dynamically Updated Pulse Sequence,Frequency Division,Equivalent Time Sampling

The counter input supports signals such as Gate, Source, HWArm, Aux, A, B, Z, and UpDown, and can be routed from any module PFI, analog trigger, and various internal signals.

• Trigger Function

cDAQ-9171 provides flexible digital trigger routing capabilities: 

Polarity: Most signals support software-selectable polarity,Analog Input Trigger: Start Trigger, Reference Trigger, Pause Trigger, Sample Clock, Sample Clock Timebase,Analog Output Trigger: Start Trigger, Pause Trigger, Sample Clock, Sample Clock Timebase,Counter/Timer Trigger: Gate, Source, HWArm, Aux, A, B, Z, UpDown.

Specifications- cDAQ-9171

Frequency Generator Specifications

Bus Interface Specifications

Environmental Adaptability

• Operating temperature: -20°C to 55°C（IEC 60068-2-1/2）
• Storage temperature: -40°C to 85°C
• Operating humidity: 10%-90% RH Non-condensing
• Storage Humidity:5%-95% RH Non-condensing 
• Pollution Level 2（IEC 60664）
• Maximum Altitude 5,000 m
• Usage Environment Indoors only

Software User Manual

The core driver software for the cDAQ-9171 C Series Sensor Test Portable USB IO Module is NI-DAQmx, a unified driver platform for NI data acquisition products that goes beyond basic device drivers, providing enhanced productivity and performance.

NI-DAQmx Core Features:

✅Consistent API: Provides the exact same programming interface for USB and Ethernet CompactDAQ chassis, allowing applications to migrate between different bus chassis without modification

✅Multi-language support: LabVIEW, LabWindows/CVI, ANSI C/C++, Visual C# .NET, Visual Basic .NET

✅Measurement & Automation Explorer (MAX): A unified management tool for hardware configuration, self-test, and test panels.

✅NI-DAQmx Help: Comprehensive function reference and programming guide

✅Abundant sample programs: Ready-to-use code examples covering all measurement types

cDAQ-9171 can be used to develop applications through the following programming environments:

✅LabVIEW

✅LabVIEW Real-Time Module

✅LabVIEW NXG

​​​​​​​✅DAQExpress

✅LabWindows/CVI

✅Measurement Studio

✅ANSI C

​​​​​​​✅NET Framework 4.0+

When developing data acquisition applications using LabVIEW and cDAQ-9171, the following practices can maximize system performance

• Utilize DAQmx task architecture: Assign measurements at different sampling rates to independent tasks, fully leveraging the NI-STC3's multi-timing engine
• Parallel data streams: Utilize signal flow technology to simultaneously execute multiple data streams such as AI, AO, DI, and DO
• Hardware timing priority: Use hardware timing whenever possible instead of software timing to ensure accurate sampling intervals
• Optimized FIFO usage: Onboard FIFOs buffer data, reducing sudden demands on USB bus bandwidth
• Counter resource sharing: Four 32-bit counters are shared through the digital module's PFI terminal, allowing for efficient counter allocation

Custom Design

We get it that standard arrangements do not continuously meet one of a kind prerequisites. Our experienced building group gives comprehensive OEM/ODM customization administrations. Whether you require adjusted recurrence ranges, specialized activating alternatives, or custom frame components, we work closely with you to create the idealize arrangement. Our adaptable plan approach guarantees your particular application needs are completely tended to whereas keeping up our quality standards.

Why Choose MXTD?

Proven Experience

With over 12 years in the industry, we understand your challenges and deliver solutions that work.

Quality Assurance

Strict quality control processes ensure every board meets our high standards for reliability and performance.

Comprehensive Support

Our technical team provides ongoing assistance from initial consultation through long-term maintenance.

Fast Response

We respond quickly to your needs, whether for standard products or custom solutions.

Reliable Delivery

Partnering with trusted logistics providers ensures your orders arrive safely and on time.

FAQ:

✅Why the device is not displayed in MAX?

A: NI-DAQmx version incompatibility or USB driver not installed correctly,please update NI-DAQmx and check USB connectivity.

✅Why unstable USB connection?

A: Loose, non-locking USB cable,please use the included locking USB cable (198506-01).

✅Why module power consumption exceeds USB limit?

A: High-power modules (such as the NI-9219) draw more than 500 mA,please using an externally powered USB hub.

✅Why module I/O status resets after USB disconnection?

A: cDAQ-9171 Design Behavior,please reconfigure the module after reconnecting the USB.

✅Why READY LED Amber?

A: The USB connection is Hi-Speed ​​(480 Mb/s),normal condition, no action required.

Note:

USB cable requirements for hazardous locations- Ordinary cables do not meet explosion-proof requirements,a locking USB cable must be used and the cable must be run through conduit.

Contact Us

Ready to integrate reliable sensor test USB module control into your system? Our team is here to help you select the right configuration and provide ongoing support.

Contact our technical specialists at manager03@mxtdinfo.com  / manager02@mxtdinfo.com for detailed specifications, pricing information, or to discuss your custom requirements. We're committed to delivering the perfect NI cDAQ-9171 C Series Sensor Test Portable USB IO Module solution for your application needs.