For user manuals and dimensional drawings, visit the product page resources tab on ni.com.
Last Revised: 2010-12-10 17:13:32.0
4-Channel Current Input C Series Module
NI 9227
5 Arms measurement (14 A peak)
50 kS/s/ch simultaneous inputs
Built-in antialias filters
250 Vrms channel-to-channel isolation
Screw terminal connectors included, protective backshells sold separately
Overview
The NI 9227 C Series current input module was designed to measure 5 Arms nominal and up to 14 A peak on each channel with channel-to-channel isolation. When used with the
NI 9225 high-voltage module, the NI 9227 current module can measure power and energy consumption for applications such as appliance and electronic device test. With up to
50 kS/s per channel simultaneous sampling, you can not only measure and meter current and power but also look at quality factors such as noise, frequency, and harmonics.
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Requirements and Compatibility
OS Information
Real-Time OS
Windows
Driver Information
NI-DAQmx
NI-RIO
Software Compatibility
LabVIEW
LabWindows/CVI
Measurement Studio
SignalExpress
Visual C++
Visual Studio
Visual Studio .NET
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Comparison Tables
Module
9201
9203
9205
9206
9215
9217
9221
Voltage
Current
Voltage
CAT I isolated voltage
Voltage
RTD
Voltage
Signal Type
8
8
Channels
500 kS/s
200 kS/s
250 kS/s
250 kS/s
Sample Rate
12
16
16
16
16
24
12
Resolution (bits)
32 SE/16 DI
16 DI
4
4
8
100 kS/s per channel
400 S/s
800 kS/s
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Module
9227
9233
9235/9236
9237
Current
IEPE
Signal Type
4
4
8
4
Channels
Sample Rate
50 kS/s per channel
50 kS/s per channel
10 kS/s per channel
50 kS/s per channel
24
24
24
24
Resolution (bits)
Quarter-bridge
Bridge
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Application and Technology
High-accuracy NI C Series analog input modules for NI CompactDAQ and CompactRIO provide high-performance measurements for a wide variety of industrial, in-vehicle, and
laboratory sensors and signal types. Each module includes built-in signal conditioning and an integrated connector with screw terminal or cable options for flexible and low-cost
signal wiring. All modules feature CompactRIO Extreme Industrial Certifications and Ratings.
C Series Compatibility
The C Series hardware family features more than 50 measurement modules and several chassis and carriers for deployment. With this variety of modules, you can mix and match
measurements such as temperature, acceleration, flow, pressure, strain, acoustic, voltage, current, digital, and more to create a custom system. Install the modules in one of
several carriers to create a single module USB, Ethernet, or Wi-Fi system, or combine them in chassis such as NI CompactDAQ and CompactRIO to create a
mixed-measurement system with synchronized measurements. You can install up to eight modules in a simple, complete NI CompactDAQ USB data acquisition system to
synchronize all of the analog output, analog input, and digital I/O from the modules. For a system without a PC, CompactRIO holds up to eight modules and features a built-in
processor, RAM, and storage for an embedded data logger or control unit. For higher-speed control, CompactRIO chassis incorporate a field-programmable gate array (FPGA)
that you can program with NI LabVIEW software to achieve silicon-speed processing on I/O data from C Series modules.
Advanced Features
When used with CompactRIO, C Series analog input modules connect directly to reconfigurable I/O (RIO) FPGA hardware to create high-performance embedded systems. The
reconfigurable FPGA hardware within CompactRIO provides a variety of options for custom timing, triggering, synchronization, filtering, signal processing, and high-speed
decision making for all C Series analog modules. For instance, with CompactRIO, you can implement custom triggering for any analog sensor type on a per-channel basis using
the flexibility and performance of the FPGA and the numerous arithmetic and comparison function blocks built into the LabVIEW FPGA Module.
Key Features
High-accuracy, high-performance analog measurements for any CompactRIO embedded system, R Series expansion chassis, or NI CompactDAQ chassis
Screw terminals, BNC, D-Sub, spring terminals, strain relief, high voltage, cable, solder cup backshell, and other connectivity options
Available channel-to-earth ground double-isolation barrier for safety, noise immunity, and high common-mode voltage range
CompactRIO Extreme Industrial Certifications and Ratings
Built-in signal conditioning for direct connection to sensors and industrial devices
Visit
ni.com/compactrio
or
ni.com/compactdaq
for up-to-date information on module availability, example programs, application notes, and other developer tools.
Connectivity Accessories
NI recommends:
NI 9971 protective backshell kit (qty 4) - PN 196375-01
NI 9976 spare screw terminal connectors for signal wire connectivity (qty 10) - PN 196739-01
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Ordering Information
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Ordering Information
For a complete list of accessories, visit the product page on ni.com.
Products
Part Number
Recommended Accessories
No accessories required.
Part Number
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Software Recommendations
LabVIEW Professional
Development System for
Windows
Advanced software tools for large project
development
Automatic code generation using DAQ
Assistant and Instrument I/O Assistant
Tight integration with a wide range of
hardware
Advanced measurement analysis and digital
signal processing
Open connectivity with DLLs, ActiveX, and
.NET objects
Capability to build DLLs, executables, and
MSI installers
SignalExpress for Windows
Quickly configure projects without
programming
Control over 400 PC-based and stand-alone
instruments
Log data from more than 250 data acquisition
devices
Perform basic signal processing, analysis,
and file I/O
Scale your application with automatic
LabVIEW code generation
Create custom reports or easily export data
to LabVIEW, DIAdem or Microsoft Excel
NI LabWindows™/CVI for
Windows
Real-time advanced 2D graphs and charts
Complete hardware compatibility with IVI,
VISA, DAQ, GPIB, and serial
Analysis tools for array manipulation, signal
processing statistics, and curve fitting
Simplified cross-platform communication with
network variables
Measurement Studio .NET tools (included in
LabWindows/CVI Full only)
The mark LabWindows is used under a
license from Microsoft Corporation.
NI Measurement Studio
Professional Edition
Customizable graphs and charts for WPF,
Windows Forms, and ASP.NET Web Forms
UI design
Analysis libraries for array operations, signal
generation, windowing, filters, signal
processing
Hardware integration support with native
.NET data acquisition and instrument control
libraries
Automatic code generation for all NI-DAQmx
data acquisition hardware
Intelligent and efficient data-logging libraries
for streaming measurement data to disk
Support for Microsoft Visual Studio .NET
2012/2010/2008
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Support and Services
System Assurance Programs
NI system assurance programs are designed to make it even easier for you to own an NI system. These programs include configuration and deployment services for your NI PXI,
CompactRIO, or Compact FieldPoint system. The NI Basic System Assurance Program provides a simple integration test and ensures that your system is delivered completely
assembled in one box. When you configure your system with the NI Standard System Assurance Program, you can select from available NI system driver sets and application
development environments to create customized, reorderable software configurations. Your system arrives fully assembled and tested in one box with your software preinstalled.
When you order your system with the standard program, you also receive system-specific documentation including a bill of materials, an integration test report, a recommended
maintenance plan, and frequently asked question documents. Finally, the standard program reduces the total cost of owning an NI system by providing three years of warranty
coverage and calibration service. Use the online product advisors at ni.com/advisor to find a system assurance program to meet your needs.
Calibration
NI measurement hardware is calibrated to ensure measurement accuracy and verify that the device meets its published specifications. To ensure the ongoing accuracy of your
measurement hardware, NI offers basic or detailed recalibration service that provides ongoing ISO 9001 audit compliance and confidence in your measurements. To learn more
about NI calibration services or to locate a qualified service center near you, contact your local sales office or visit ni.com/calibration.
Technical Support
Get answers to your technical questions using the following National Instruments resources.
Support
- Visit ni.com/support to access the NI KnowledgeBase, example programs, and tutorials or to contact our applications engineers who are located in NI sales
offices around the world and speak the local language.
Discussion Forums
- Visit forums.ni.com for a diverse set of discussion boards on topics you care about.
Online Community
- Visit community.ni.com to find, contribute, or collaborate on customer-contributed technical content with users like you.
Repair
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While you may never need your hardware repaired, NI understands that unexpected events may lead to necessary repairs. NI offers repair services performed by highly trained
technicians who quickly return your device with the guarantee that it will perform to factory specifications. For more information, visit ni.com/repair.
Training and Certifications
The NI training and certification program delivers the fastest, most certain route to increased proficiency and productivity using NI software and hardware. Training builds the skills
to more efficiently develop robust, maintainable applications, while certification validates your knowledge and ability.
Classroom training in cities worldwide
- the most comprehensive hands-on training taught by engineers.
On-site training at your facility
- an excellent option to train multiple employees at the same time.
Online instructor-led training
- lower-cost, remote training if classroom or on-site courses are not possible.
Course kits
- lowest-cost, self-paced training that you can use as reference guides.
Training memberships
and training credits - to buy now and schedule training later.
Visit ni.com/training for more information.
Extended Warranty
NI offers options for extending the standard product warranty to meet the life-cycle requirements of your project. In addition, because NI understands that your requirements may
change, the extended warranty is flexible in length and easily renewed. For more information, visit ni.com/warranty.
OEM
NI offers design-in consulting and product integration assistance if you need NI products for OEM applications. For information about special pricing and services for OEM
customers, visit ni.com/oem.
Alliance
Our Professional Services Team is comprised of NI applications engineers, NI Consulting Services, and a worldwide National Instruments Alliance Partner program of more than
700 independent consultants and integrators. Services range from start-up assistance to turnkey system integration. Visit ni.com/alliance.
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Detailed Specifications
The following specifications are typical for the range – 40 to 70 °C unless otherwise noted. All voltages are relative to the AI– signal on each channel unless otherwise noted.
Caution
The input terminals of this device are not protected for electromagnetic interference. As a result, this device may experience reduced measurement accuracy or
other temporary performance degradation when connected cables are routed in an environment with radiated or conducted radio frequency electromagnetic interference.
To limit radiated emissions and to ensure that this device functions within specifications in its operational electromagnetic environment, take precautions when designing,
selecting, and installing measurement probes and cables.
Input Characteristics
Number of channels
ADC resolution
Type of ADC
Sampling mode
Internal master timebase (ƒ
M
)
Frequency
Accuracy
Data rate range (ƒ
s
) using internal master timebase
Minimum
Maximum
Data rate range (ƒ
s
) using external master timebase
Minimum
Maximum
Data rates
1
(ƒs)
5 A
rms
10 A
rms
for 1 s max with 19 s minimum cool down time at 5 A
rms
390.6 S/s
51.2 kS/s
1.613 kS/s
50 kS/s
12.8 MHz
±100 ppm max
4 analog input channels
24 bits
Delta-Sigma (with analog prefiltering)
Simultaneous
Safe operating input range
2
,
3
Overcurrent handling
4
Instantaneous measuring range
5
Minimum
Typical
14.051 ADC
14.977 ADC, at 23 ±5 °C
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Typical scaling coefficient
Input coupling
Input impedance (AI+ to AI–)
Input noise (ƒs = 50 kS/s)
1.785397 μA/LSB
DC
12 mΩ
400 μA
rms
Accuracy at safe operating range of 5 A
rms
Measurement Conditions
Calibrated max (– 40 to 70 °C)
Calibrated typ (23 °C, ±5 °C)
Percent of Reading (Gain Error) Percent of Range
6
(Offset Error)
±0.37%
±0.1%
±0.18%
±0.05%
±2.4%
±1.0%
Uncalibrated max (– 40 to 70 °C) ±5.0%
Uncalibrated typ (23 °C, ±5 °C)
±2.5%
Accuracy at operating range of 10 A
rms
Measurement Conditions
Percent of Reading (Gain Error) Percent of Range
7
(Offset Error)
±0.19%
Calibrated max (– 40 to 70 °C) ±0.38%
Stability
Gain drift
Offset drift
Post calibration gain match (ch-to-ch, ƒin = 20 kHz)
Crosstalk
(ƒin = 1 kHz)
(ƒin = 50 Hz)
Phase match (ƒ
in
= 20 kHz)
Ch-to-ch, max
Module-to-module, max
Phase linearity (ƒs = 50 kS/s)
Input delay
Passband
Frequency
Flatness (ƒs = 50 kS/s)
Stopband
Frequency
Rejection
Alias-free bandwidth
–3 dB bandwidth (ƒs = 50 kS/s)
CMRR (ƒin = 50 Hz)
SFDR (ƒin = 1 kHz, –60 dB)
Total Harmonic Distortion (THD) (ƒin = 1 kHz, –1 dBFS)
MTBF
0.547 · ƒs
100 dB
0.453 · ƒs min
24.609 kHz
150 dB
110 dB
–95 dB
Contact NI for Bellcore MTBF or MIL-HDBK-217F specifications.
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