{"id":34656,"date":"2026-08-07T13:26:32","date_gmt":"2026-08-07T05:26:32","guid":{"rendered":"https:\/\/pxisource.com\/?post_type=product&#038;p=34656"},"modified":"2026-09-18T15:03:54","modified_gmt":"2026-09-18T07:03:54","slug":"usb-6221","status":"publish","type":"product","link":"https:\/\/pxisource.com\/ru\/product\/usb-6221\/","title":{"rendered":"USB-6221"},"content":{"rendered":"<h3>USB-6221 16-Bit USB M Series Multifunction DAQ Device<\/h3>\n<p>\u0417\u0435\u043c\u043b\u044f <strong>NI USB-6221<\/strong> is a USB M Series multifunction data acquisition device designed for automated measurement, data logging, laboratory control and electronic validation. It combines analog input, analog output, digital I\/O and counter\/timer functions in an external USB enclosure.<\/p>\n<p>The USB-6221 provides 16 single-ended or eight differential analog inputs with 16-bit resolution and a maximum aggregate sampling rate of 250 kS\/s. It also includes two hardware-timed analog outputs, 24 individually programmable digital I\/O lines and two 32-bit counters.<\/p>\n<p>Screw-terminal, BNC and OEM versions support different installation requirements. The USB model requires an external 11 VDC to 30 VDC power source, unlike the smaller USB-6210 and USB-6211 bus-powered devices.<\/p>\n<h3>Key Features of the USB-6221<\/h3>\n<ul>\n<li>16 single-ended or 8 differential analog inputs<\/li>\n<li>16-bit analog input resolution<\/li>\n<li>250 kS\/s maximum aggregate input rate<\/li>\n<li>\u00b10.2 V, \u00b11 V, \u00b15 V and \u00b110 V input ranges<\/li>\n<li>700 kHz small-signal input bandwidth<\/li>\n<li>Two 16-bit analog outputs<\/li>\n<li>Up to 833 kS\/s on one analog output<\/li>\n<li>Up to 740 kS\/s per channel with two analog outputs<\/li>\n<li>24 individually programmable digital I\/O lines<\/li>\n<li>Up to eight hardware-timed digital lines<\/li>\n<li>Two 32-bit counters<\/li>\n<li>80 MHz counter timebase<\/li>\n<li>USB 2.0 Hi-Speed interface<\/li>\n<li>External digital triggering<\/li>\n<li>NI-DAQmx driver compatibility<\/li>\n<li>Screw-terminal, BNC and OEM configurations<\/li>\n<\/ul>\n<h2>USB-6221 Technical Specifications<\/h2>\n<table>\n<tbody>\n<tr>\n<th>Product Model<\/th>\n<td>USB-6221<\/td>\n<\/tr>\n<tr>\n<th>Product Family<\/th>\n<td>NI M Series multifunction DAQ<\/td>\n<\/tr>\n<tr>\n<th>Analog Inputs<\/th>\n<td>16 single-ended or 8 differential<\/td>\n<\/tr>\n<tr>\n<th>ADC Resolution<\/th>\n<td>16 bits<\/td>\n<\/tr>\n<tr>\n<th>Maximum AI Sample Rate<\/th>\n<td>250 kS\/s single-channel or aggregate<\/td>\n<\/tr>\n<tr>\n<th>Input Ranges<\/th>\n<td>\u00b10.2 V, \u00b11 V, \u00b15 V and \u00b110 V<\/td>\n<\/tr>\n<tr>\n<th>Input Coupling<\/th>\n<td>DC<\/td>\n<\/tr>\n<tr>\n<th>Small-Signal Bandwidth<\/th>\n<td>700 kHz<\/td>\n<\/tr>\n<tr>\n<th>Analog Outputs<\/th>\n<td>2<\/td>\n<\/tr>\n<tr>\n<th>DAC Resolution<\/th>\n<td>16 bits<\/td>\n<\/tr>\n<tr>\n<th>Maximum AO Rate<\/th>\n<td>833 kS\/s on one channel; 740 kS\/s per channel with two channels<\/td>\n<\/tr>\n<tr>\n<th>Output Range<\/th>\n<td>\u00b110 V<\/td>\n<\/tr>\n<tr>\n<th>Output Current Drive<\/th>\n<td>\u00b15 mA<\/td>\n<\/tr>\n<tr>\n<th>\u0426\u0438\u0444\u0440\u043e\u0432\u043e\u0439 \u0432\u0432\u043e\u0434-\u0432\u044b\u0432\u043e\u0434<\/th>\n<td>24 individually programmable lines<\/td>\n<\/tr>\n<tr>\n<th>Correlated Digital I\/O<\/th>\n<td>8 lines on Port 0, up to 1 MHz with an external or shared clock<\/td>\n<\/tr>\n<tr>\n<th>Counters<\/th>\n<td>2 \u00d7 32-bit<\/td>\n<\/tr>\n<tr>\n<th>Counter Timebases<\/th>\n<td>80 MHz, 20 MHz and 100 kHz<\/td>\n<\/tr>\n<tr>\n<th>USB Interface<\/th>\n<td>USB 2.0 Hi-Speed or Full-Speed<\/td>\n<\/tr>\n<tr>\n<th>Power Requirement<\/th>\n<td>11 VDC to 30 VDC, 20 W external supply<\/td>\n<\/tr>\n<tr>\n<th>Connector Versions<\/th>\n<td>Screw terminal, BNC and OEM<\/td>\n<\/tr>\n<tr>\n<th>Software Driver<\/th>\n<td>\u041d\u0418-DAQmx<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>USB-6221 Part Number and Accessories<\/h2>\n<p>The USB-6221 is available in multiple mechanical and connector configurations. Confirm the complete part number because a screw-terminal USB-6221, BNC USB-6221 and OEM USB-6221 require different wiring and mounting arrangements.<\/p>\n<table>\n<tbody>\n<tr>\n<th>Configuration or Accessory<\/th>\n<th>\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435<\/th>\n<\/tr>\n<tr>\n<td>USB-6221 Screw Terminal<\/td>\n<td>Integrated terminals for sensors, control wiring and laboratory fixtures<\/td>\n<\/tr>\n<tr>\n<td>USB-6221 BNC<\/td>\n<td>Direct coaxial connections for laboratory signals<\/td>\n<\/tr>\n<tr>\n<td>USB-6221 OEM<\/td>\n<td>Board-level configuration for integration into custom equipment<\/td>\n<\/tr>\n<tr>\n<td>USB 2.0 Cable<\/td>\n<td>Host-computer communication<\/td>\n<\/tr>\n<tr>\n<td>11 VDC to 30 VDC Power Supply<\/td>\n<td>External power required for the enclosed USB version<\/td>\n<\/tr>\n<tr>\n<td>DIN-Rail Mounting Accessory<\/td>\n<td>Mounting in cabinets and industrial test systems<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>16-Bit Analog Input Measurement<\/h3>\n<p>The USB-6221 can acquire as many as 16 ground-referenced single-ended voltage signals or eight differential signals. Differential wiring is generally preferred for low-level signals and electrically noisy environments.<\/p>\n<p>The input ranges allow the ADC to be matched to different signal amplitudes. Use the smallest range that safely contains the complete signal, including expected offset and transient voltage.<\/p>\n<h3>Hardware-Timed Analog Output<\/h3>\n<p>Two 16-bit analog outputs generate programmable \u00b110 V signals. They can produce static voltages, periodic waveforms or nonperiodic waveforms for automated stimulus-and-response testing.<\/p>\n<p>The analog outputs provide greater update speed and current drive than those on the USB-6211. Loads requiring more than \u00b15 mA need an external amplifier or buffer.<\/p>\n<h3>24 Digital I\/O Lines<\/h3>\n<p>All 24 digital terminals can be programmed individually as inputs or outputs. The eight Port 0 lines support correlated digital acquisition or generation when supplied with a suitable sample clock.<\/p>\n<p>Digital I\/O is intended for logic-level signals. Use external relay, transistor or isolation hardware when controlling motors, lamps, solenoids or industrial voltage levels.<\/p>\n<h2>USB-6221 Applications<\/h2>\n<ul>\n<li>Automated functional testing<\/li>\n<li>Laboratory data acquisition<\/li>\n<li>Sensor and transducer measurement<\/li>\n<li>Analog stimulus and response testing<\/li>\n<li>Digital fixture control<\/li>\n<li>Encoder and frequency measurement<\/li>\n<li>Production test systems<\/li>\n<li>Research and educational laboratories<\/li>\n<li>Portable mixed-signal measurement<\/li>\n<\/ul>\n<h3>Automated Test Fixtures<\/h3>\n<p>The USB-6221 can measure DUT voltages, generate two analog stimulus signals and control fixture logic from one device. This reduces the number of separate instruments required for basic functional testing.<\/p>\n<h3>Data Logging<\/h3>\n<p>The device can record conditioned voltage outputs from temperature, pressure, force and position sensors. Direct connection of thermocouples, strain gauges and IEPE sensors normally requires appropriate external signal conditioning.<\/p>\n<h2>USB-6221 Installation Workflow<\/h2>\n<h4>Step 1: Select the Correct USB-6221 Version<\/h4>\n<p>Choose screw-terminal, BNC or OEM hardware according to the required installation and signal connections.<\/p>\n<h4>Step 2: Install NI-DAQmx<\/h4>\n<p>Install a compatible NI-DAQmx version before configuring the device and development software.<\/p>\n<h4>Step 3: Connect the External Power Supply<\/h4>\n<p>Use an approved 11 VDC to 30 VDC supply capable of delivering 20 W. Confirm polarity before applying power.<\/p>\n<h4>Step 4: Connect USB<\/h4>\n<p>Connect the device directly to a USB 2.0 Hi-Speed or later host port whenever possible.<\/p>\n<h4>Step 5: Wire the Signals<\/h4>\n<p>Follow the pinout for the exact connector version and select the appropriate differential, RSE or NRSE analog input mode.<\/p>\n<h4>Step 6: Validate the Device<\/h4>\n<p>Run a self-test and use NI-DAQmx test panels to verify analog input, output, digital I\/O and counter operation.<\/p>\n<h2>USB-6221 Troubleshooting<\/h2>\n<h4>The USB-6221 Is Not Detected<\/h4>\n<p>Verify both the external power supply and USB connection. Unlike USB-6210 devices, the enclosed USB-6221 requires external DC power.<\/p>\n<h4>Analog Input Channels Show Crosstalk<\/h4>\n<p>Reduce source impedance, use differential wiring and allow sufficient multiplexed-channel settling time.<\/p>\n<h4>The Analog Output Voltage Drops<\/h4>\n<p>Check whether the load exceeds the \u00b15 mA output-current capability. Use an external buffer for heavier loads.<\/p>\n<h4>Hardware-Timed Digital I\/O Does Not Run<\/h4>\n<p>Correlated digital operation is limited to Port 0 and requires a clock from another device subsystem or an external source.<\/p>\n<h2>USB-6221 Comparison<\/h2>\n<table>\n<tbody>\n<tr>\n<th>\u041c\u043e\u0434\u0435\u043b\u044c<\/th>\n<th>Analog Inputs<\/th>\n<th>Maximum AI Rate<\/th>\n<th>Analog Outputs<\/th>\n<th>\u0426\u0438\u0444\u0440\u043e\u0432\u043e\u0439 \u0432\u0432\u043e\u0434-\u0432\u044b\u0432\u043e\u0434<\/th>\n<\/tr>\n<tr>\n<td>USB-6211<\/td>\n<td>16<\/td>\n<td>250 kS\/s<\/td>\n<td>2 at 250 kS\/s<\/td>\n<td>8 static lines<\/td>\n<\/tr>\n<tr>\n<td>USB-6221<\/td>\n<td>16<\/td>\n<td>250 kS\/s<\/td>\n<td>2, up to 833 kS\/s<\/td>\n<td>24 lines<\/td>\n<\/tr>\n<tr>\n<td>USB-6251<\/td>\n<td>16<\/td>\n<td>1,25 \u041c\u0421\u043c\/\u0441<\/td>\n<td>2, up to 2.86 MS\/s<\/td>\n<td>24 lines<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Choose the USB-6221 for moderate-speed measurement with 24 digital lines. Choose the <a href=\"https:\/\/pxisource.com\/ru\/product\/usb-6251\/\">USB-6251<\/a> when substantially faster analog input and output performance is required.<\/p>\n<h2>USB-6221 Frequently Asked Questions<\/h2>\n<h4>What is the maximum sampling rate?<\/h4>\n<p>The maximum analog input sampling rate is 250 kS\/s aggregate.<\/p>\n<h4>Does the USB-6221 require external power?<\/h4>\n<p>Yes. The enclosed USB version requires an 11 VDC to 30 VDC, 20 W power source.<\/p>\n<h4>How many digital lines are available?<\/h4>\n<p>The USB-6221 provides 24 individually programmable digital I\/O lines.<\/p>\n<h4>Does it support analog output?<\/h4>\n<p>Yes. It provides two 16-bit, \u00b110 V analog outputs.<\/p>\n<h4>Which connector versions are available?<\/h4>\n<p>NI documents screw-terminal, BNC and OEM USB-6221 configurations.<\/p>\n<h3>Recommended Related Products<\/h3>\n<ul>\n<li><a href=\"https:\/\/pxisource.com\/ru\/product\/usb-6211\/\">USB-6211 Multifunction DAQ Device<\/a><\/li>\n<li><a href=\"https:\/\/pxisource.com\/ru\/product\/usb-6251\/\">USB-6251 High-Speed Multifunction DAQ<\/a><\/li>\n<li><a href=\"https:\/\/pxisource.com\/ru\/product\/usb-6255\/\">USB-6255 80-Channel Multifunction DAQ<\/a><\/li>\n<\/ul>\n<h3>Request a Quote for the USB-6221<\/h3>\n<p>Contact us for current availability, connector configuration and project pricing for the <strong>NI USB-6221 multifunction DAQ device<\/strong>.<\/p>","protected":false},"excerpt":{"rendered":"<p>USB-6221 16-Bit USB M Series Multifunction DAQ Device The NI USB-6221 is a USB M Series multifunction data acquisition device<\/p>","protected":false},"featured_media":33670,"template":"","meta":{"_acf_changed":false},"product_brand":[18],"product_cat":[674,800],"product_tag":[],"class_list":["post-34656","product","type-product","status-publish","has-post-thumbnail","product_brand-national-instruments","product_cat-pci-modules","product_cat-usb-devices","first","instock","shipping-taxable","product-type-simple"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.0 (Yoast SEO v28.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>NI USB-6221 USB Multifunction I\/O Device 780117-02, In Stock | Project Pricing<\/title>\n<meta name=\"description\" content=\"The USB-6221 is a 16-bit USB M Series DAQ device with 16 analog inputs, two analog outputs, 24 digital I\/O lines and two counters.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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