OPERATING INSTRUCTIONS AND SPECIFICATIONS NI 9229E/9239E 4-Channel, ±60/±10 V, 24-Bit Simultaneous, Channel-to-Channel Isolated Analog Input Modules
This document describes how to use the National Instruments 9229E and National Instruments 9239E and includes dimensions, terminal assignments, and specifications. In this document, the NI 9229E and NI 9239E are referred to inclusively as the NI 9229E/9239E. Visit ni.com/info and enter rdsoftwareversion to determine which software you need for the modules you are using. For information about installing, configuring, and programming the system, refer to the system documentation. Visit ni.
NI 9229E/9239E Dimensions The following figure shows the dimensions of the NI 9229E/9239E. 73.4 (2.89) 58.4 (2.30) 66.0 (2.60) 26.7 (1.05) 0.0 (0.00) 0.0 (0.00) Figure 1. NI 9229E/9239E Dimensions in Millimeters (Inches) © National Instruments Corp.
Connecting the NI 9229E/9239E The NI 9229E/9239E provides connections for four simultaneously sampled, isolated analog input channels. AI0+ AI0– 0 1 AI1+ AI1– 0 1 AI2+ AI2– 0 1 AI3+ AI3– 0 1 Figure 2. NI 9229E/9239E Terminal Assignments NI 9229E/9239E 4 ni.
The NI 9229E /9239E has four 2-terminal detachable screw-terminal connectors. Note You must use 2-wire ferrules to create a secure connection when connecting more than one wire to a single terminal on the NI 9229E /9239E. You can connect ground-referenced or floating signal sources to the NI 9229E/9239E. Connect the positive signal of the signal source to the AI+ terminal, and connect the negative signal of the signal source to the AI– terminal.
Signal Source + – AI+ AI– NI 9229E/9239E Figure 3. Connecting a Grounded Signal Source to the NI 9229E/9239E Signal Source AI+ + – AI– NI 9229E/9239E Figure 4. Connecting a Floating Signal Source to the NI 9229E/9239E NI 9229E/9239E 6 ni.
The NI 9229E/9239E analog input channels are floating with respect to earth ground and each other. The incoming analog signal on each channel is conditioned, buffered, and then sampled by a 24-bit Delta-Sigma ADC. Each channel provides an independent signal path and ADC, enabling you to sample all four channels simultaneously. Refer to Figure 5 for an illustration of the circuitry for one channel. AI+ AI– Overvoltage Protection ADC Amplifier Prefilter NI 9229E/9239E Figure 5.
Understanding NI 9229E/9239E Filtering The NI 9229E/9239E uses a combination of analog and digital filtering to provide an accurate representation of in-band signals while rejecting out-of-band signals. The filters discriminate between signals based on the frequency range, or bandwidth, of the signal. The three important bandwidths to consider are the passband, the stopband, and the alias-free bandwidth.
0.025 Gain (dB) 0.000 –0.025 –0.050 0 0.1 0.2 0.3 0.4 0.5 Frequency/Data Rate Figure 6. Typical Passband Flatness for the NI 9229E/9239E © National Instruments Corp.
Stopband The filter significantly attenuates all signals above the stopband frequency. The primary goal of the filter is to prevent aliasing. Therefore, the stopband frequency scales precisely with the data rate. The stopband rejection is the minimum amount of attenuation applied by the filter to all signals with frequencies within the stopband. Alias-Free Bandwidth Any signal that appears in the alias-free bandwidth of the NI 9229E/9239E is not an aliased artifact of signals at a higher frequency.
to control sampling, all of the modules must share a single master timebase source. Refer to the software help for information about configuring the master timebase source for the NI 9229E/9239E. Visit ni.com/info and enter cseriesdoc for information about C Series documentation. The following equation provides the available data rates of the NI 9229E/9239E: f M ÷ 256 fs = --------------------n where n is any integer from 1 to 31. However, the data rate must remain within the appropriate data rate range.
Sleep Mode This module supports a low-power sleep mode. Support for sleep mode at the system level depends on the chassis that the module is plugged into. Refer to the chassis manual for information about support for sleep mode. If the chassis supports sleep mode, refer to the software help for information about enabling sleep mode. Visit ni.com/info and enter cseriesdoc for information about C Series documentation. Typically, when a system is in sleep mode, you cannot communicate with the modules.
Specifications The following specifications are typical for the range –40 to 85 °C internal to any enclosures unless otherwise noted. All voltages are relative to the AI– signal on each channel unless otherwise noted. The specifications are the same for the NI 9229E and the NI 9239E unless otherwise noted. Input Characteristics Number of channels.......................... 4 analog input channels ADC resolution................................. 24 bits Type of ADC.....................................
Data rate range ( fs) using external master timebase Minimum.................................... 390.625 S/s Maximum ................................... 51.2 kS/s f M ÷ 256 Data rates1 ( fs) .................................. --------------------- , n = 1, 2, …, 31 n Input voltage ranges (AI+ to AI–) Module Nominal (V) Typical (V) Minimum (V) NI 9229E ±60 ±62.64 ±61.5 NI 9239E ±10 ±10.52 ±10.3 Overvoltage protection ..................... ±100 V Input coupling...................................
Accuracy, NI 9229E Percent of Reading (Gain Error) Percent of Range* (Offset Error) Calibrated max (–40 to 70 °C) ±0.13% ±0.05% Calibrated typ (25 °C, ±5 °C) ±0.03% ±0.008% Uncalibrated max (–40 to 70 °C) ±1.2% ±0.55% Uncalibrated typ (25 °C, ±5 °C) ±0.3% ±0.11% Measurement Conditions * Range equals 62.64 V © National Instruments Corp.
Accuracy, NI 9239E Percent of Reading (Gain Error) Percent of Range* (Offset Error) Calibrated max (–40 to 70 °C) ±0.13% ±0.06% Calibrated typ (25 °C, ±5 °C) ±0.03% ±0.008% Uncalibrated max (–40 to 70 °C) ±1.4% ±0.70% Uncalibrated typ (25 °C, ±5 °C) ±0.3% ±0.11% Measurement Conditions * Range equals 10.52 V Input noise NI 9229E .................................... 320 μVrms NI 9239E .................................... 70 μVrms Stability Gain drift ....................................
Post calibration gain match (ch-to-ch, 20 kHz)............................. 0.22 dB max Crosstalk (1 kHz).............................. –130 dB Phase mismatch (ch-to-ch) NI 9229E .................................... 0.045°/kHz max NI 9239E .................................... 0.075°/kHz max Phase mismatch (module-to-module, max) NI 9229E .................................... 0.045°/kHz + 360°· fin /fM NI 9239E .................................... 0.
Alias-free bandwidth ........................ 0.453 · fs –3 dB prefilter bandwidth ( fs = 50 kS/s) ..................................... 24.56 kHz CMRR ( fin = 60 Hz) NI 9229E .................................... 116 dB NI 9239E .................................... 126 dB SFDR (1 kHz, –60 dBFS)................. 128 dBFS Total Harmonic Distortion (THD) 1 kHz, –1 dBFS .......................... –99 dB 1 kHz, –20 dBFS ........................ –105 dB MTBF ...............................................
Power Requirements Power consumption from chassis Active mode ............................... 740 mW max Sleep mode ................................. 25 μW max Thermal dissipation (at 70 °C) Active mode ............................... 760 mW max Sleep mode ................................. 16 mW max Physical Characteristics Use a dry, low-velocity stream of air to clean the module. If needed, use a soft-bristle brush for cleaning around components.
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............................................... 50 g (1.8 oz) Safety Isolation Voltages Connect only voltages that are within the following limits. Channel-to-channel Continuous ................................. 250 Vrms, Measurement Category II, (Basic insulation) Withstand....................................
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 the NI 9229E/9239E to signals or use for measurements within Measurement Categories III or IV.
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. Environmental National Instruments C Series modules are intended for indoor use only but may be used outdoors if installed in a suitable enclosure.
Maximum altitude............................. 2,000 m Pollution Degree (IEC 60664) .......... 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 to the environment and to NI customers. For additional environmental information, refer to the NI and the Environment Web page at ni.com/environment.
⬉ᄤֵᙃѻક∵ᶧࠊㅵ⧚ࡲ⊩ ˄Ё RoHS˅ Ёᅶ᠋ National Instruments ヺড়Ё⬉ᄤֵᙃ ѻકЁ䰤ࠊՓ⫼ᶤѯ᳝ᆇ⠽䋼ᣛҸ (RoHS)DŽ݇Ѣ National Instruments Ё RoHS ড়㾘ᗻֵᙃˈ䇋ⱏᔩ ni.com/environment/rohs_chinaDŽ (For information about China RoHS compliance, go to ni.com/ environment/rohs_china.) Calibration You can obtain the calibration certificate and information about calibration services for the NI 9229E/9239E at ni.com/ calibration. Calibration interval ........................... 1 year NI 9229E/9239E 24 ni.
Where to Go for Support The National Instruments Web site is your complete resource for technical support. At ni.com/support you have access to everything from troubleshooting and application development self-help resources to email and phone assistance from NI Application Engineers. National Instruments corporate headquarters is located at 11500 North Mopac Expressway, Austin, Texas, 78759-3504. National Instruments also has offices located around the world to help address your support needs.
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