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.

Requirements and Compatibility

OS Information Real-Time OS Windows

Driver Information NI-DAQmx NI-RIO

Software Compatibility LabVIEW LabVIEW SignalExpress LabWindows/CVI Measurement Studio Visual C++ Visual Studio Visual Studio .NET

Comparison Tables

Module	Signal Type	Channels	Sample Rate	Resolution (bits)
9201	Voltage	8	500 kS/s	12
9203	Current	8	200 kS/s	16
9205	Voltage	32 SE/16 DI	250 kS/s	16
9206	CAT I isolated voltage	16 DI	250 kS/s	16
9215	Voltage	4	100 kS/s per channel	16
9217	RTD	4	400 S/s	24
9221	Voltage	8	800 kS/s	12
9227	Current	4	50 kS/s per channel	24
9233	IEPE	4	50 kS/s per channel	24
9235/9236	Quarter-bridge	8	10 kS/s per channel	24
9237	Bridge	4	50 kS/s per channel	24

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

 

 

 

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	NI LabVIEW 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

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

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.

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		4 analog input channels
ADC resolution		24 bits
Type of ADC		Delta-Sigma (with analog prefiltering)
Sampling mode		Simultaneous
Internal master timebase (ƒM)
Frequency		12.8 MHz
Accuracy		±100 ppm max
Data rate range (ƒs) using internal master timebase
Minimum		1.613 kS/s
Maximum		50 kS/s
Data rate range (ƒs) using external master timebase
Minimum		390.6 S/s
Maximum		51.2 kS/s
Data rates 1 (ƒs)
Safe operating input range 2 ,  3		5 Arms
Overcurrent handling 4		10 Arms for 1 s max with 19 s minimum cool down time at 5 Arms
Instantaneous measuring range 5
Minimum		14.051 ADC
Typical		14.977 ADC, at 23 ±5 °C
Typical scaling coefficient		1.785397 μA/LSB
Input coupling		DC
Input impedance (AI+ to AI–)		12 mΩ
Input noise (ƒs = 50 kS/s)		400 μArms

Stability
Gain drift		±21 ppm/°C
Offset drift		±51 μA/°C
Post calibration gain match (ch-to-ch, ƒin = 20 kHz)		±130 mdB max
Crosstalk
(ƒin = 1 kHz)		–90 dB
(ƒin = 50 Hz)		–115 dB
Phase match (ƒin = 20 kHz)
Ch-to-ch, max		0.1°/kHz
Module-to-module, max		0.1°/kHz + 360° · ƒin /ƒM
Phase linearity (ƒs = 50 kS/s)		0.1° max
Input delay		38.4/fs + 3.2 s
Passband
Frequency		0.453 · ƒs
Flatness (ƒs = 50 kS/s)		±100 mdB max
Stopband
Frequency		0.547 · ƒs
Rejection		100 dB
Alias-free bandwidth		0.453 · ƒs min
–3 dB bandwidth (ƒs = 50 kS/s)		24.609 kHz
CMRR (ƒin = 50 Hz)		150 dB
SFDR (ƒin = 1 kHz, –60 dB)		110 dB
Total Harmonic Distortion (THD) (ƒin = 1 kHz, –1 dBFS)		–95 dB
MTBF		Contact NI for Bellcore MTBF or MIL-HDBK-217F specifications.
Power Requirements
Power consumption from chassis
Active mode		730 mW max
Sleep mode		50 μW max
Thermal dissipation (at 70 °C) 8
Active mode		1.23 W max
Sleep mode		500 mW max
Physical Characteristics
If you need to clean the module, wipe it with a dry towel. Note For two-dimensional drawings and three-dimensional models of the C Series module and connectors, visit ni.com/dimensions and search by module number.
Screw-terminal wiring		16 to 28 AWG copper conductor wire with 7 mm (0.28 in.) of insulation stripped from the end
Torque for screw terminals		0.22 to 0.25 N · m (1.95 to 2.21 lb · in.)
Ferrules		0.25 mm2 to 0.5 mm2
Weight		145 g (5.1 oz)
Safety
Isolation Voltages
Connect only voltages that are within the following limits.
Channel-to-channel
Continuous		250 Vrms, Measurement Category II
Withstand		1,390 Vrms, verified by a 5 s dielectric withstand test
Channel-to-earth ground
Continuous		250 Vrms, Measurement Category II
Withstand		2,300 Vrms, verified by a 5 s dielectric withstand test
Zone 2 hazardous locations applications
Maximum voltage (channel-to-earth ground and channel-to-channel)		60 VDC, Measurement Category I
Measurement Category I is for measurements performed on circuits not directly connected to the electrical distribution system referred to as MAINS voltage. MAINS is a hazardous live electrical supply system that powers equipment. This category is for measurements of voltages from specially protected secondary circuits. Such voltage measurements include signal levels, special equipment, limited-energy parts of equipment, circuits powered by regulated low-voltage sources, and electronics. Caution Do not connect to signals or use for measurements within Measurement Categories II, III, or IV. Measurement Category II is for measurements performed on circuits directly connected to the electrical distribution system. This category refers to local-level electrical distribution, such as that provided by a standard wall outlet, for example, 115 V for U.S. or 230 V for Europe. Caution Do not connect to signals or use for measurements within Measurement Categories III or IV.
Hazardous Locations
U.S. (UL)		Class I, Division 2, Groups A, B, C, D, T4; Class I, Zone 2, AEx nA IIC T4
Canada (C-UL)		Class I, Division 2, Groups A, B, C, D, T4; Class I, Zone 2, Ex nA IIC T4
Europe (DEMKO)		Ex nA IIC T4
Safety Standards
This product is designed to meet the requirements of the following standards of safety for electrical equipment for measurement, control, and laboratory use: IEC 61010-1, EN 61010-1 UL 61010-1, CSA 61010-1 Note For UL and other safety certifications, refer to the product label or the Online Product Certification section.
Electromagnetic Compatibility
This product is designed to meet the requirements of the following standards of EMC for electrical equipment for measurement, control, and laboratory use: EN 61326 (IEC 61326): Class A emissions; Industrial immunity EN 55011 (CISPR 11): Group 1, Class A emissions AS/NZS CISPR 11: Group 1, Class A emissions FCC 47 CFR Part 15B: Class A emissions ICES-001: Class A emissions Note For the standards applied to assess the EMC of this product, refer to the Online Product Certification section. Note For EMC compliance, operate this device with shielded cables.
CE Compliance
This product meets the essential requirements of applicable European Directives, as amended for CE marking, as follows: 2006/95/EC; Low-Voltage Directive (safety) 2004/108/EC; Electromagnetic Compatibility Directive (EMC)
Online Product Certification
Refer to the product Declaration of Conformity (DoC) for additional regulatory compliance information. To obtain product certifications and the DoC for this product, visit ni.com/certification, search by module number or product line, and click the appropriate link in the Certification column.
Shock and Vibration
To meet these specifications, you must panel mount the system and either affix ferrules to the ends of the terminal wires or use the NI 9971 backshell kit to protect the connections.
Operating vibration
Random (IEC 60068-2-64)		5 grms, 10 to 500 Hz
Sinusoidal (IEC 60068-2-6)		5 g, 10 to 500 Hz
Operating shock (IEC 60068-2-27)		30 g, 11 ms half sine, 50 g, 3 ms half sine, 18 shocks at 6 orientations
Environmental
National Instruments C Series modules are intended for indoor use only but may be used outdoors if installed in a suitable enclosure. Refer to the manual for the chassis you are using for more information about meeting these specifications.
Operating temperature (IEC 60068-2-1, IEC 60068-2-2)		– 40 to 70 °C
Storage temperature (IEC 60068-2-1, IEC 60068-2-2)		– 40 to 100 °C
Ingress protection		IP 40
Operating humidity (IEC 60068-2-56)		10 to 90% RH, noncondensing
Storage humidity (IEC 60068-2-56)		5 to 95% RH, noncondensing
Maximum altitude		2,000 m
Pollution Degree		2
Environmental Management
National Instruments is committed to designing and manufacturing products in an environmentally responsible manner. NI recognizes that eliminating certain hazardous substances from our products is beneficial not only to the environment but also to NI customers. For additional environmental information, refer to the NI and the Environment Web page at ni.com/environment. This page contains the environmental regulations and directives with which NI complies, as well as other environmental information not included in this document.
Waste Electrical and Electronic Equipment (WEEE)
EU Customers At the end of their life cycle, all products must be sent to a WEEE recycling center. For more information about WEEE recycling centers and National Instruments WEEE initiatives, visit ni.com/environment/weee.htm.
Calibration
You can obtain the calibration certificate for this device at ni.com/calibration.
Calibration interval		1 year

Pinouts/Front Panel Connections

NI 9227 Terminal Assignments