{"id":33019,"date":"2026-06-02T15:02:37","date_gmt":"2026-06-02T07:02:37","guid":{"rendered":"https:\/\/pxisource.com\/?post_type=product&#038;p=33019"},"modified":"2026-09-07T20:30:48","modified_gmt":"2026-09-07T12:30:48","slug":"%d0%bd%d0%b8-9326","status":"publish","type":"product","link":"https:\/\/pxisource.com\/ru\/product\/ni-9326\/","title":{"rendered":"\u041d\u0418-9326"},"content":{"rendered":"<h3>NI-9326 6-Channel C Series Frequency Input Module<\/h3>\n<p>\u0417\u0435\u043c\u043b\u044f <strong>\u041d\u0418-9326<\/strong> is a six-channel C Series frequency input module designed for frequency, period and edge-counting measurements. It supports differential or single-ended signals with amplitudes ranging from approximately \u00b150 mV to 150 Vrms.<\/p>\n<p>Each input can be routed to an independent 32-bit counter and configured for rising- or falling-edge detection. Adjustable voltage thresholds, hysteresis, digital glitch filtering and analog Butterworth filters help the module acquire signals from variable-reluctance sensors, Hall-effect sensors, encoders and other industrial pulse sources.<\/p>\n<h3>Key Features of the NI-9326<\/h3>\n<ul>\n<li>Six frequency input channels<\/li>\n<li>Six independent 32-bit counters<\/li>\n<li>Differential or single-ended input configuration<\/li>\n<li>0.025 Hz to 128 kHz frequency range<\/li>\n<li>102.4 kS\/s maximum counter sample rate<\/li>\n<li>100 MHz internal counter timebase<\/li>\n<li>\u00b150 mV minimum to 150 Vrms maximum input range<\/li>\n<li>241 kHz input bandwidth<\/li>\n<li>Rising- or falling-edge detection per channel<\/li>\n<li>Programmable threshold and hysteresis<\/li>\n<li>Digital glitch filtering<\/li>\n<li>Selectable second-order Butterworth filters<\/li>\n<li>Channel-to-channel isolation<\/li>\n<li>150 Vrms channel-to-earth isolation<\/li>\n<li>-40\u00b0C to 70\u00b0C operating range<\/li>\n<\/ul>\n<h2>NI-9326 Technical Specifications<\/h2>\n<table>\n<tbody>\n<tr>\n<th>Product Model<\/th>\n<td>\u041d\u0418-9326<\/td>\n<\/tr>\n<tr>\n<th>Product Type<\/th>\n<td>C Series frequency input module<\/td>\n<\/tr>\n<tr>\n<th>Number of Inputs<\/th>\n<td>6<\/td>\n<\/tr>\n<tr>\n<th>Input Configuration<\/th>\n<td>Differential or single-ended<\/td>\n<\/tr>\n<tr>\n<th>Input Range<\/th>\n<td>\u00b150 mV minimum to 150 Vrms maximum<\/td>\n<\/tr>\n<tr>\n<th>Input Frequency Range<\/th>\n<td>0.025 Hz to 128 kHz<\/td>\n<\/tr>\n<tr>\n<th>Input Bandwidth<\/th>\n<td>241 kHz at -3 dB<\/td>\n<\/tr>\n<tr>\n<th>Minimum Detectable Pulse Width<\/th>\n<td>2 \u00b5s under specified conditions<\/td>\n<\/tr>\n<tr>\n<th>Input Propagation Delay<\/th>\n<td>1.67 \u00b5s maximum<\/td>\n<\/tr>\n<tr>\n<th>Channel-to-Channel Skew<\/th>\n<td>85 ns maximum<\/td>\n<\/tr>\n<tr>\n<th>Threshold Range<\/th>\n<td>-9.5 V to +9.5 V per channel<\/td>\n<\/tr>\n<tr>\n<th>Threshold Resolution<\/th>\n<td>7.8 mV<\/td>\n<\/tr>\n<tr>\n<th>Hysteresis Range<\/th>\n<td>0 V to 5 V per channel<\/td>\n<\/tr>\n<tr>\n<th>Digital Glitch Filter<\/th>\n<td>0 ns to 5.24 ms in 80 ns steps<\/td>\n<\/tr>\n<tr>\n<th>Analog Filter<\/th>\n<td>Second-order Butterworth<\/td>\n<\/tr>\n<tr>\n<th>Number of Counters<\/th>\n<td>6<\/td>\n<\/tr>\n<tr>\n<th>Counter Resolution<\/th>\n<td>32 bits<\/td>\n<\/tr>\n<tr>\n<th>Counter Sample Rate<\/th>\n<td>102.4 kS\/s maximum<\/td>\n<\/tr>\n<tr>\n<th>Counter Measurements<\/th>\n<td>Frequency, period and edge counting<\/td>\n<\/tr>\n<tr>\n<th>Internal Timebase<\/th>\n<td>100 MHz<\/td>\n<\/tr>\n<tr>\n<th>Timebase Accuracy<\/th>\n<td>\u00b164 ppm maximum<\/td>\n<\/tr>\n<tr>\n<th>\u0418\u0437\u043e\u043b\u044f\u0446\u0438\u044f<\/th>\n<td>150 Vrms channel-to-channel and channel-to-earth, CAT I<\/td>\n<\/tr>\n<tr>\n<th>Weight<\/th>\n<td>170 g<\/td>\n<\/tr>\n<tr>\n<th>Operating Temperature<\/th>\n<td>-40\u00b0C to 70\u00b0C<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Six Independent Frequency Counters<\/h3>\n<p>The NI-9326 contains six 32-bit counters, allowing all six channels to perform frequency, period or edge-counting measurements. Any input channel can be routed to any counter input, providing flexibility when configuring measurement logic.<\/p>\n<p>The 100 MHz internal timebase supports accurate timing of pulse periods and edges. Measurement performance depends on the input frequency, filter settings, signal quality and selected counter mode.<\/p>\n<h3>Flexible Input Thresholds<\/h3>\n<p>The programmable threshold range allows the module to detect signals that do not conform to one fixed digital logic level. This is useful for variable-reluctance sensors, magnetic pickups, Hall-effect sensors and other devices whose output amplitude changes with speed or operating condition.<\/p>\n<p>Hysteresis can be added to prevent electrical noise near the threshold from producing multiple false transitions.<\/p>\n<h3>Digital and Analog Filtering<\/h3>\n<p>The digital glitch filter rejects pulses shorter than the configured duration. Settings are available from disabled operation through 5.24 ms, with 80 ns resolution.<\/p>\n<p>The second-order Butterworth filter offers selectable cutoff frequencies from approximately 1 Hz to 6.167 kHz. Lower cutoff settings reduce measurement noise but introduce additional delay and settling time.<\/p>\n<h3>High-Voltage Isolated Inputs<\/h3>\n<p>The module supports input signals up to 150 Vrms and provides isolation between channels and earth ground. It is rated for Measurement Category I signal circuits and must not be connected directly to building mains or higher measurement categories.<\/p>\n<h2>NI-9326 Part Number and Accessories<\/h2>\n<table>\n<tbody>\n<tr>\n<th>Item<\/th>\n<th>Part Number<\/th>\n<th>\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435<\/th>\n<\/tr>\n<tr>\n<td>NI-9326 Standard<\/td>\n<td>786999-01<\/td>\n<td>Six-channel C Series frequency input module<\/td>\n<\/tr>\n<tr>\n<td>NI-9326 Conformal Coated<\/td>\n<td>786999-02<\/td>\n<td>Conformal-coated version for additional environmental protection<\/td>\n<\/tr>\n<tr>\n<td>NI-9960<\/td>\n<td>Configuration dependent<\/td>\n<td>Screw-terminal plugs for NI-9326 signal connections<\/td>\n<\/tr>\n<tr>\n<td>NI-9929<\/td>\n<td>Configuration dependent<\/td>\n<td>Backshell kit providing insulation and operator protection<\/td>\n<\/tr>\n<tr>\n<td>Shielded Sensor Cable<\/td>\n<td>Application dependent<\/td>\n<td>Connects encoders and frequency sensors in noisy environments<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>The NI-9929 backshell is particularly important when wiring higher-voltage signals because it provides additional insulation and strain relief around the terminal connections.<\/p>\n<h2>NI-9326 Applications<\/h2>\n<ul>\n<li>Rotational-speed measurement<\/li>\n<li>Variable-reluctance sensor acquisition<\/li>\n<li>Hall-effect sensor monitoring<\/li>\n<li>Encoder pulse counting<\/li>\n<li>Turbine and engine testing<\/li>\n<li>Flowmeter frequency measurement<\/li>\n<li>Industrial tachometer systems<\/li>\n<li>Automotive dynamometer testing<\/li>\n<li>Period and pulse measurement<\/li>\n<li>\u041c\u043e\u043d\u0438\u0442\u043e\u0440\u0438\u043d\u0433 \u0441\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u044f \u043e\u0431\u043e\u0440\u0443\u0434\u043e\u0432\u0430\u043d\u0438\u044f<\/li>\n<\/ul>\n<h3>Rotational-Speed Measurement<\/h3>\n<p>Frequency measurements from a gear-tooth or magnetic pickup can be converted into shaft speed using the number of pulses generated per revolution. Programmable thresholds help maintain reliable detection as sensor amplitude changes with speed.<\/p>\n<h3>Flow and Turbine Monitoring<\/h3>\n<p>Many turbine flowmeters provide a pulse frequency proportional to flow rate. The NI-9326 can measure frequency or count total pulses for instantaneous-flow and accumulated-volume calculations.<\/p>\n<h2>NI-9326 Installation Workflow<\/h2>\n<h4>Step 1: Identify the Sensor Signal<\/h4>\n<p>Determine whether the source is differential or single-ended and document its minimum and maximum amplitude, frequency and source impedance.<\/p>\n<h4>Step 2: Install the Module<\/h4>\n<p>Insert the NI-9326 into a compatible CompactDAQ or CompactRIO chassis and secure the module.<\/p>\n<h4>Step 3: Connect the Sensor<\/h4>\n<p>Connect differential signals between CH+ and CH-. Use short, shielded wiring where low-amplitude signals are exposed to electrical noise.<\/p>\n<h4>Step 4: Configure Threshold and Hysteresis<\/h4>\n<p>Set a threshold that lies within the valid signal swing and add enough hysteresis to prevent noise-related transitions.<\/p>\n<h4>Step 5: Select the Filter<\/h4>\n<p>Use digital glitch rejection or the Butterworth filter when necessary, while accounting for the filter\u2019s delay and settling time.<\/p>\n<h4>Step 6: Verify Against a Known Frequency<\/h4>\n<p>Apply a known pulse source and confirm the measured frequency, period and edge count before connecting the production sensor.<\/p>\n<h2>NI-9326 Troubleshooting<\/h2>\n<h4>The module reports zero frequency<\/h4>\n<p>Check CH+ and CH- polarity, sensor power and signal amplitude. Confirm that the waveform crosses the configured threshold.<\/p>\n<h4>The measured frequency is unstable<\/h4>\n<p>Increase hysteresis, enable glitch filtering or select an appropriate Butterworth filter. Inspect shielding and grounding.<\/p>\n<h4>Low-speed signals are not detected<\/h4>\n<p>Verify the minimum sensor amplitude at low speed and reduce the threshold if necessary. Variable-reluctance sensors often produce smaller signals at low rotational speed.<\/p>\n<h4>High-frequency pulses are missed<\/h4>\n<p>Review pulse width, filter settings and the 128 kHz input-frequency limit. Disable excessive filtering during high-frequency measurements.<\/p>\n<h4>Two channels interfere with one another<\/h4>\n<p>Improve cable separation and shielding. Skip an adjacent physical channel when practical to improve crosstalk performance.<\/p>\n<h2>NI-9326 Comparison<\/h2>\n<table>\n<tbody>\n<tr>\n<th>\u041c\u043e\u0434\u0435\u043b\u044c<\/th>\n<th>\u041a\u043e\u043d\u0444\u0438\u0433\u0443\u0440\u0430\u0446\u0438\u044f<\/th>\n<th>Best Suited For<\/th>\n<\/tr>\n<tr>\n<td>\u041d\u0418-9326<\/td>\n<td>6 isolated frequency inputs, 128 kHz<\/td>\n<td>High-voltage and variable-amplitude frequency signals<\/td>\n<\/tr>\n<tr>\n<td>NI-9361<\/td>\n<td>8-channel differential counter input<\/td>\n<td>Encoders and conventional differential pulse sources<\/td>\n<\/tr>\n<tr>\n<td>NI-9411<\/td>\n<td>6 differential digital inputs<\/td>\n<td>Fast differential digital and encoder signals<\/td>\n<\/tr>\n<tr>\n<td>NI-9423<\/td>\n<td>8 high-speed 24 V sinking inputs<\/td>\n<td>Industrial pulse-state detection<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>NI-9326 Frequently Asked Questions<\/h2>\n<h4>How many counters does the NI-9326 provide?<\/h4>\n<p>It provides six independent 32-bit counters.<\/p>\n<h4>What measurements can it perform?<\/h4>\n<p>The counters support frequency, period and edge-counting measurements.<\/p>\n<h4>What is the maximum input frequency?<\/h4>\n<p>The specified input-frequency range extends to 128 kHz.<\/p>\n<h4>Can it measure variable-reluctance sensors?<\/h4>\n<p>Yes. Its adjustable thresholds, hysteresis and filters make it suitable for many variable-reluctance sensor signals.<\/p>\n<h4>Are the channels isolated?<\/h4>\n<p>Yes. The module provides 150 Vrms channel-to-channel and channel-to-earth isolation for CAT I circuits.<\/p>\n<h3>Request a Quote for the NI-9326<\/h3>\n<p>Contact us for availability, lead time and project pricing for the <strong>NI-9326 C Series frequency input module<\/strong>. We can also help select NI-9960 terminals, the NI-9929 backshell and compatible CompactDAQ or CompactRIO hardware.<\/p>","protected":false},"excerpt":{"rendered":"<p>\u041a\u043e\u043b\u0438\u0447\u0435\u0441\u0442\u0432\u043e \u0430\u043d\u0430\u043b\u043e\u0433\u043e\u0432\u044b\u0445 \u0432\u0445\u043e\u0434\u043d\u044b\u0445 \u043a\u0430\u043d\u0430\u043b\u043e\u0432: 6<br \/>\n\u0418\u0437\u043e\u043b\u044f\u0446\u0438\u044f \u0430\u043d\u0430\u043b\u043e\u0433\u043e\u0432\u043e\u0433\u043e \u0432\u0445\u043e\u0434\u0430: 150 B RMS \u0438\u0437\u043e\u043b\u044f\u0446\u0438\u044f \u043a\u0430\u043d\u0430\u043b-\u043a\u0430\u043d\u0430\u043b<br \/>\n\u0418\u0437\u043c\u0435\u0440\u044f\u0435\u043c\u044b\u0439 \u044d\u043b\u0435\u043a\u0442\u0440\u0438\u0447\u0435\u0441\u043a\u0438\u0439 \u0441\u0438\u0433\u043d\u0430\u043b: \u043d\u0430\u043f\u0440\u044f\u0436\u0435\u043d\u0438\u0435<br \/>\n\u041f\u0435\u0440\u0435\u0434\u043d\u0438\u0439 \u0440\u0430\u0437\u044a\u0435\u043c: 12-\u043a\u043e\u043d\u0442\u0430\u043a\u0442\u043d\u044b\u0439, \u0448\u0442\u044b\u0440\u0435\u0432\u043e\u0439 \u0432\u0438\u043d\u0442\u043e\u0432\u043e\u0439 \u0437\u0430\u0436\u0438\u043c<br \/>\n\u0412 \u043a\u043e\u043c\u043f\u043b\u0435\u043a\u0442 \u0432\u0445\u043e\u0434\u0438\u0442: \u0414\u0430<br \/>\n\u041f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0435\u043c\u0430\u044f \u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u0430\u044f \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u0430: \u0421\u0435\u0440\u0438\u044f C<br \/>\n\u041f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0435\u043c\u044b\u0439 \u0442\u0438\u043f \u0434\u0430\u0442\u0447\u0438\u043a\u0430: \u0434\u0430\u0442\u0447\u0438\u043a \u0425\u043e\u043b\u043b\u0430, \u043e\u0434\u043d\u043e\u043a\u0430\u043d\u0430\u043b\u044c\u043d\u044b\u0439 \u044d\u043d\u043a\u043e\u0434\u0435\u0440, \u0434\u0430\u0442\u0447\u0438\u043a \u0441 \u0438\u0437\u043c\u0435\u043d\u044f\u044e\u0449\u0438\u043c\u0441\u044f \u0441\u043e\u043f\u0440\u043e\u0442\u0438\u0432\u043b\u0435\u043d\u0438\u0435\u043c<br \/>\n\u0418\u043c\u0435\u0435\u0442 \u043e\u043f\u0430\u0441\u043d\u044b\u0435 \u0437\u043e\u043d\u044b: \u0414\u0430<br \/>\n\u041c\u0430\u043a\u0441\u0438\u043c\u0430\u043b\u044c\u043d\u0430\u044f \u0432\u0445\u043e\u0434\u043d\u0430\u044f \u0447\u0430\u0441\u0442\u043e\u0442\u0430: 128 \u043a\u0413\u0446<\/p>","protected":false},"featured_media":31068,"template":"","meta":{"_acf_changed":false},"product_brand":[18],"product_cat":[673],"product_tag":[],"class_list":["post-33019","product","type-product","status-publish","has-post-thumbnail","product_brand-national-instruments","product_cat-c-module","first","instock","shipping-taxable","purchasable","product-type-simple"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.0 (Yoast SEO v28.4) - 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