{"id":32506,"date":"2026-05-07T09:31:41","date_gmt":"2026-05-07T01:31:41","guid":{"rendered":"https:\/\/pxisource.com\/?post_type=product&#038;p=32506"},"modified":"2026-08-29T14:55:20","modified_gmt":"2026-08-29T06:55:20","slug":"pxi-2576","status":"publish","type":"product","link":"https:\/\/pxisource.com\/ru\/product\/pxi-2576\/","title":{"rendered":"PXI-2576"},"content":{"rendered":"<h3>PXI-2576 64-Channel Multibank Multiplexer Module<\/h3>\n<p>\u0417\u0435\u043c\u043b\u044f <strong>PXI-2576<\/strong> is a 64-channel, two-wire PXI multiplexer switch module with 16 independently configurable banks of 4\u00d71 multiplexers. Its flexible architecture supports parallel measurements and high-channel-count sequential scanning.<\/p>\n<p>The multiplexer banks can operate independently or be combined into larger configurations, including a single <strong>64\u00d71 two-wire multiplexer<\/strong>. The module supports switching voltages up to 100 V, currents up to 1 A and switching power up to 30 W or 37.5 VA per channel.<\/p>\n<h3>Key Features of the PXI-2576<\/h3>\n<ul>\n<li>64 two-wire input channels<\/li>\n<li>16 independent 4\u00d71 multiplexer banks<\/li>\n<li>Flexible multibank architecture<\/li>\n<li>Configurable 4\u00d71, 8\u00d71, 16\u00d71, 32\u00d71 and 64\u00d71 topologies<\/li>\n<li>100 V maximum switching voltage<\/li>\n<li>1 A maximum switching and carrying current<\/li>\n<li>30 W or 37.5 VA maximum switching power<\/li>\n<li>Up to 130 switching cycles per second<\/li>\n<li>Greater than 10 MHz bandwidth in the 64\u00d71 topology<\/li>\n<li>Electromechanical latching relays<\/li>\n<li>Hardware triggering for deterministic scanning<\/li>\n<li>Onboard relay-operation counting<\/li>\n<li>PXI Hybrid bus connector<\/li>\n<li>NI-SWITCH and NI Switch Executive support<\/li>\n<\/ul>\n<h3>PXI-2576 Technical Specifications<\/h3>\n<table>\n<tbody>\n<tr>\n<th>Product Model<\/th>\n<td>PXI-2576<\/td>\n<\/tr>\n<tr>\n<th>Part Number<\/th>\n<td>778572-76<\/td>\n<\/tr>\n<tr>\n<th>Product Type<\/th>\n<td>PXI Multibank Multiplexer Switch Module<\/td>\n<\/tr>\n<tr>\n<th>Number of Channels<\/th>\n<td>64 two-wire channels<\/td>\n<\/tr>\n<tr>\n<th>Independent Banks<\/th>\n<td>16<\/td>\n<\/tr>\n<tr>\n<th>Default Bank Topology<\/th>\n<td>Sixteen 4\u00d71, two-wire multiplexers<\/td>\n<\/tr>\n<tr>\n<th>Supported Topologies<\/th>\n<td>Independent, sixteen 4\u00d71, eight 8\u00d71, four 16\u00d71, two 32\u00d71 or one 64\u00d71<\/td>\n<\/tr>\n<tr>\n<th>\u0422\u0438\u043f \u0440\u0435\u043b\u0435<\/th>\n<td>Electromechanical, latching<\/td>\n<\/tr>\n<tr>\n<th>Maximum Scan Rate<\/th>\n<td>130 cycles\/s<\/td>\n<\/tr>\n<tr>\n<th>Typical Relay Operating Time<\/th>\n<td>2 ms<\/td>\n<\/tr>\n<tr>\n<th>Maximum Switching Voltage<\/th>\n<td>100 V channel-to-channel or channel-to-ground<\/td>\n<\/tr>\n<tr>\n<th>Measurement Category<\/th>\n<td>CAT I<\/td>\n<\/tr>\n<tr>\n<th>Maximum Switching Current<\/th>\n<td>1 A<\/td>\n<\/tr>\n<tr>\n<th>Maximum Carrying Current<\/th>\n<td>1 A<\/td>\n<\/tr>\n<tr>\n<th>Maximum Switching Power<\/th>\n<td>30 W or 37.5 VA per channel<\/td>\n<\/tr>\n<tr>\n<th>Typical Initial Path Resistance<\/th>\n<td>0.5 \u03a9<\/td>\n<\/tr>\n<tr>\n<th>Maximum Initial Path Resistance<\/th>\n<td>Less than 1.1 \u03a9<\/td>\n<\/tr>\n<tr>\n<th>Typical Thermal EMF<\/th>\n<td>Less than 10 \u00b5V<\/td>\n<\/tr>\n<tr>\n<th>Typical 4\u00d71 and 8\u00d71 Bandwidth<\/th>\n<td>Greater than 30 MHz in a 50 \u03a9 system<\/td>\n<\/tr>\n<tr>\n<th>Typical 64\u00d71 Bandwidth<\/th>\n<td>Greater than 10 MHz<\/td>\n<\/tr>\n<tr>\n<th>Front Connector<\/th>\n<td>160-pin LFH<\/td>\n<\/tr>\n<tr>\n<th>Bus Connector<\/th>\n<td>PXI Hybrid<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>PXI-2576 Part Number and Accessories<\/h3>\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>PXI-2576<\/td>\n<td>778572-76<\/td>\n<td>64-channel, two-wire multibank PXI multiplexer<\/td>\n<\/tr>\n<tr>\n<td>TB-2676<\/td>\n<td>779535-01<\/td>\n<td>Terminal block with ribbon cable headers for PXI-2576<\/td>\n<\/tr>\n<tr>\n<td>TB-2676 Cable Kit<\/td>\n<td>779669-01<\/td>\n<td>Ribbon cable kit for accessing TB-2676 channels<\/td>\n<\/tr>\n<tr>\n<td>LFH160 to 50-Pin D-SUB Cable<\/td>\n<td>780009-01<\/td>\n<td>Cable solution for connecting PXI-2576 signals to external hardware<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>The TB-2676 mounts to the module and provides ribbon cable headers for accessing and configuring the switch channels. The TB-2676 Cable Kit is ordered separately when ribbon cable connections are required.<\/p>\n<h3>Sixteen Independent 4\u00d71 Multiplexer Banks<\/h3>\n<p>The PXI-2576 contains 16 separate two-wire 4\u00d71 multiplexer banks. Each bank routes one of four differential input channels to its corresponding common connection.<\/p>\n<p>The banks can operate independently, allowing up to 16 parallel measurement paths when suitable instruments or measurement channels are available.<\/p>\n<h3>Flexible Multiplexer Topologies<\/h3>\n<p>Individual banks can be combined to create larger multiplexer configurations. Supported configurations include:<\/p>\n<ul>\n<li>Sixteen independent 4\u00d71 two-wire multiplexers<\/li>\n<li>Eight independent 8\u00d71 two-wire multiplexers<\/li>\n<li>Four independent 16\u00d71 two-wire multiplexers<\/li>\n<li>Two independent 32\u00d71 two-wire multiplexers<\/li>\n<li>One 64\u00d71 two-wire multiplexer<\/li>\n<\/ul>\n<p>This flexibility allows the same module to support parallel low-channel-count measurements or sequential acquisition across all 64 channels.<\/p>\n<h3>Two-Wire Switching<\/h3>\n<p>Each channel switches both the positive and negative signal conductors together. Two-wire switching is useful for differential voltage, resistance, temperature and other floating measurements.<\/p>\n<p>Switching both conductors helps reduce errors caused by unwanted shared return paths and ground-potential differences.<\/p>\n<h3>100 V and 1 A Switching Capacity<\/h3>\n<p>The PXI-2576 supports channel-to-channel and channel-to-ground switching voltages up to <strong>100 V<\/strong> in Measurement Category I applications.<\/p>\n<p>Each channel or common connection supports switching and carrying currents up to <strong>1 A<\/strong>, subject to the maximum switching power of 30 W or 37.5 VA.<\/p>\n<h3>Measurement Category I Operation<\/h3>\n<p>The module is rated for Measurement Category I and should only be used with appropriately protected signal circuits. It must not be connected directly to building mains or Measurement Category II, III or IV circuits.<\/p>\n<p>When hazardous voltage is present on any channel, safety extra-low-voltage signals should not be connected to other channels on the module.<\/p>\n<h3>Low Path Resistance<\/h3>\n<p>The initial channel-to-common path resistance is typically 0.5 \u03a9 and specified below 1.1 \u03a9. Low path resistance helps reduce voltage drops and resistance measurement errors.<\/p>\n<p>Path resistance includes relay contact resistance, PCB traces, cables and terminal connections. The complete switching path should be considered when making precision resistance measurements.<\/p>\n<h3>Multiplexer Bandwidth<\/h3>\n<p>Bandwidth depends on the selected topology. In a 50 \u03a9 system, the 4\u00d71 and 8\u00d71 configurations provide typical bandwidth greater than 30 MHz, while the 64\u00d71 topology provides bandwidth greater than 10 MHz.<\/p>\n<p>Actual system bandwidth also depends on cable length, fixture design, connected instruments and the number of linked multiplexer banks.<\/p>\n<h3>Electromechanical Latching Relays<\/h3>\n<p>The PXI-2576 uses electromechanical latching relays. Latching relays maintain their selected state without requiring continuous coil power, helping reduce module power consumption and heat generation.<\/p>\n<p>Onboard relay counting allows software to monitor operation counts and plan preventive maintenance in frequently used test systems.<\/p>\n<h3>Hardware-Triggered Scanning<\/h3>\n<p>Hardware triggers allow the PXI-2576 to advance through a predefined scan list with deterministic timing. This reduces dependence on individual software commands from the host controller.<\/p>\n<p>The multiplexer can be synchronized with a digital multimeter, resistance meter or other PXI instrument to automate multichannel measurements.<\/p>\n<h3>\u0422\u0438\u043f\u0438\u0447\u043d\u044b\u0435 \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u044f<\/h3>\n<ul>\n<li>Multichannel voltage measurement<\/li>\n<li>Two-wire resistance measurement<\/li>\n<li>Temperature sensor scanning<\/li>\n<li>Electronic component validation<\/li>\n<li>Battery and cell monitoring<\/li>\n<li>Semiconductor device testing<\/li>\n<li>Printed circuit board testing<\/li>\n<li>Automated functional testing<\/li>\n<li>Data acquisition channel expansion<\/li>\n<li>Parallel measurement systems<\/li>\n<\/ul>\n<h3>Multichannel Voltage Measurements<\/h3>\n<p>The PXI-2576 can route as many as 64 differential voltage signals to a digital multimeter or other measurement instrument. The software-controlled scan list determines the measurement order.<\/p>\n<p>For faster testing, separate multiplexer banks can be connected to multiple measurement channels and operated in parallel.<\/p>\n<h3>Resistance and Temperature Measurements<\/h3>\n<p>The two-wire architecture can route resistance sensors, thermistors and other resistive devices. Switch and cable resistance should be considered when measuring low-resistance signals.<\/p>\n<p>When higher accuracy is required, use compensation techniques or select a four-wire multiplexer configuration from another compatible switch module.<\/p>\n<h3>NI-SWITCH Driver Support<\/h3>\n<p>The PXI-2576 is controlled through the NI-SWITCH driver. NI-SWITCH provides functions for selecting topologies, connecting channels, creating scan lists, processing hardware triggers and monitoring relay counts.<\/p>\n<p>Applications can be developed using LabVIEW, C, C#, Python and other supported programming environments.<\/p>\n<h3>NI Switch Executive Integration<\/h3>\n<p>NI Switch Executive allows developers to define meaningful route and channel names for complex switching systems. Test software can call named routes instead of controlling individual relays directly.<\/p>\n<p>This simplifies application development and helps reduce routing errors when several switch modules are used in one system.<\/p>\n<h3>\u0418\u043d\u0442\u0435\u0433\u0440\u0430\u0446\u0438\u044f \u0441\u0438\u0441\u0442\u0435\u043c PXI<\/h3>\n<p>The PXI-2576 uses a PXI Hybrid connector and requires a compatible PXI or PXI Express hybrid chassis slot. The system controller must support the required NI-SWITCH driver version.<\/p>\n<p>Visit the <a href=\"https:\/\/pxisource.com\/ru\/product-category\/%d0%bd%d0%b8\/pxi-%d1%81%d0%b8%d1%81%d1%82%d0%b5%d0%bc%d1%81\/%d0%bc%d0%be%d0%b4%d1%83%d0%bb%d0%b8-pxi\/\">NI PXI Modules category<\/a> to explore related switch and measurement hardware.<\/p>\n<h3>Troubleshooting the PXI-2576<\/h3>\n<h4>The module is not detected<\/h4>\n<p>Confirm that the PXI-2576 is installed in a compatible PXI Hybrid slot. Check the chassis controller, PXI Platform Services and NI-SWITCH driver installation.<\/p>\n<h4>A channel does not connect to the expected common<\/h4>\n<p>Verify the selected topology, bank number, channel name and common terminal. Channel assignments change according to the configured multiplexer topology.<\/p>\n<h4>Resistance measurements are higher than expected<\/h4>\n<p>Include relay, cable and terminal resistance in the measurement. Inspect the terminal connections and compensate for path resistance when appropriate.<\/p>\n<h4>The module reports a topology or route error<\/h4>\n<p>Confirm that the requested route is valid for the topology configured in NI-SWITCH. Disconnect conflicting routes before changing the topology.<\/p>\n<h4>A relay does not switch reliably<\/h4>\n<p>Check the load voltage and current against the minimum and maximum specifications. Review the relay count and allow sufficient settling time after switching.<\/p>\n<h4>Measurements contain excessive noise<\/h4>\n<p>Use shielded cables, maintain separation from high-power wiring and confirm that the signal source and measurement instrument have compatible grounding.<\/p>\n<h3>PXI-2576 Comparison<\/h3>\n<table>\n<tbody>\n<tr>\n<th>\u041c\u043e\u0434\u0435\u043b\u044c<\/th>\n<th>\u041a\u0430\u043d\u0430\u043b\u044b<\/th>\n<th>Wire Mode<\/th>\n<th>Maximum Voltage<\/th>\n<th>Primary Use<\/th>\n<\/tr>\n<tr>\n<td>PXI-2576<\/td>\n<td>64<\/td>\n<td>2-wire<\/td>\n<td>100 V<\/td>\n<td>Flexible multibank and parallel measurements<\/td>\n<\/tr>\n<tr>\n<td>PXI-2575<\/td>\n<td>Up to 196<\/td>\n<td>1-, 2- or 4-wire<\/td>\n<td>300 V<\/td>\n<td>High-channel-count sequential measurements<\/td>\n<\/tr>\n<tr>\n<td>PXIe-2575<\/td>\n<td>Up to 196<\/td>\n<td>1-, 2- or 4-wire<\/td>\n<td>300 V<\/td>\n<td>PXI Express high-channel-count multiplexing<\/td>\n<\/tr>\n<tr>\n<td>PXI-2527<\/td>\n<td>32<\/td>\n<td>2-wire<\/td>\n<td>300 V<\/td>\n<td>General-purpose high-voltage multiplexing<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Recommended Related Products<\/h3>\n<ul>\n<li><a href=\"https:\/\/pxisource.com\/ru\/product\/pxi-2575\/\">PXI-2575<\/a> \u2013 high-density multiplexer with configurable one-, two- and four-wire operation<\/li>\n<li><a href=\"https:\/\/pxisource.com\/ru\/product\/pxie-2575\/\">PXIe-2575<\/a> \u2013 PXI Express high-channel-count multiplexer for automated measurements<\/li>\n<li><a href=\"https:\/\/pxisource.com\/ru\/product\/pxi-2527\/\">PXI-2527<\/a> \u2013 32-channel multiplexer for higher-voltage signal routing<\/li>\n<li><a href=\"https:\/\/pxisource.com\/ru\/product\/pxie-2527\/\">PXIe-2527<\/a> \u2013 PXI Express multiplexer for general-purpose automated testing<\/li>\n<li><a href=\"https:\/\/pxisource.com\/ru\/product\/pxie-4080\/\">PXIe-4080<\/a> \u2013 digital multimeter for automated voltage, current and resistance measurements<\/li>\n<\/ul>\n<h3>Selecting the PXI-2576<\/h3>\n<p>Choose the PXI-2576 when an application requires up to 64 two-wire channels, flexible multibank configurations or several parallel measurement paths within one switch module.<\/p>\n<p>If a larger number of sequential channels or four-wire measurements is required, consider the PXI-2575 or PXIe-2575. For higher-voltage 32-channel switching, the PXI-2527 may be more suitable.<\/p>\n<h3>PXI-2576 vs PXI-2575<\/h3>\n<p>The PXI-2576 provides 64 two-wire channels organized as 16 configurable 4\u00d71 banks. It is optimized for flexible topologies and parallel measurement operations.<\/p>\n<p>The PXI-2575 provides a larger channel count and supports one-, two- and four-wire operation. Select the PXI-2576 for multibank flexibility or the PXI-2575 for maximum sequential channel capacity.<\/p>\n<h3>Why Choose the PXI-2576?<\/h3>\n<ul>\n<li>64 two-wire multiplexer channels<\/li>\n<li>Sixteen independently configurable banks<\/li>\n<li>Flexible 4\u00d71 through 64\u00d71 topologies<\/li>\n<li>100 V and 1 A switching capability<\/li>\n<li>Low initial path resistance<\/li>\n<li>Hardware-triggered deterministic scanning<\/li>\n<li>NI-SWITCH and Switch Executive integration<\/li>\n<\/ul>\n<h3>Frequently Asked Questions<\/h3>\n<h4>What is the PXI-2576 used for?<\/h4>\n<p>The PXI-2576 is used to route multichannel voltage, resistance, temperature and other two-wire signals to measurement instruments in automated test systems.<\/p>\n<h4>How many channels does the PXI-2576 provide?<\/h4>\n<p>The module provides 64 two-wire channels organized as 16 banks of 4\u00d71 multiplexers.<\/p>\n<h4>Which multiplexer topologies are supported?<\/h4>\n<p>It supports independent banks, sixteen 4\u00d71, eight 8\u00d71, four 16\u00d71, two 32\u00d71 or one 64\u00d71 two-wire configuration.<\/p>\n<h4>What voltage and current can the PXI-2576 switch?<\/h4>\n<p>The module supports up to  100 V, 1 A and 30 W or 37.5 VA per channel in Measurement Category I applications.<\/p>\n<h4>Which relay type does it use?<\/h4>\n<p>The PXI-2576 uses electromechanical latching relays.<\/p>\n<h4>Can the PXI-2576 perform parallel measurements?<\/h4>\n<p>Yes. Its independent multiplexer banks can connect to separate measurement channels for parallel acquisition.<\/p>\n<h4>Which terminal block is used with the PXI-2576?<\/h4>\n<p>The TB-2676 terminal block, part number 779535-01, provides access to the PXI-2576 channels.<\/p>\n<h4>Does the module support hardware triggering?<\/h4>\n<p>Yes. Hardware triggering enables deterministic scan advancement and synchronization with compatible measurement instruments.<\/p>\n<h4>What is the PXI-2576 part number?<\/h4>\n<p>The standard NI part number for the PXI-2576 is <strong>778572-76<\/strong>.<\/p>\n<h3>Request a Quote for the PXI-2576<\/h3>\n<p>Contact us for current availability, lead time and project pricing for the <strong>PXI-2576 Multibank Multiplexer Switch Module<\/strong>. We can also help confirm compatible terminal blocks, cable kits, PXI chassis and related measurement instruments.<\/p>","protected":false},"excerpt":{"rendered":"<p>Scan Rate: 600 cycles\/s<br \/>\n\u0420\u0435\u0436\u0438\u043c (n-\u043f\u0440\u043e\u0432\u043e\u0434\u043d\u044b\u0439): 2-\u043f\u0440\u043e\u0432\u043e\u0434\u043d\u044b\u0439<br \/>\n\u0428\u0438\u043d\u043d\u044b\u0439 \u0441\u043e\u0435\u0434\u0438\u043d\u0438\u0442\u0435\u043b\u044c: PXI Hybrid<br \/>\n\u041c\u0430\u043a\u0441\u0438\u043c\u0430\u043b\u044c\u043d\u044b\u0439 \u043a\u043e\u043c\u043c\u0443\u0442\u0438\u0440\u0443\u0435\u043c\u044b\u0439 \u0442\u043e\u043a DC: 1 \u0410<br \/>\n\u041c\u0430\u043a\u0441. \u043a\u043e\u043c\u043c\u0443\u0442\u0438\u0440\u0443\u0435\u043c\u043e\u0435 \u043d\u0430\u043f\u0440\u044f\u0436\u0435\u043d\u0438\u0435 DC: 100 \u0412<br \/>\n\u0422\u0438\u043f \u0440\u0435\u043b\u0435: \u042d\u043b\u0435\u043a\u0442\u0440\u043e\u043c\u0435\u0445\u0430\u043d\u0438\u0447\u0435\u0441\u043a\u043e\u0435<br \/>\n\u041f\u0440\u043e\u043f\u0443\u0441\u043a\u043d\u0430\u044f \u0441\u043f\u043e\u0441\u043e\u0431\u043d\u043e\u0441\u0442\u044c \u043a\u043e\u043c\u043c\u0443\u0442\u0430\u0442\u043e\u0440\u0430: 30 \u041c\u0413\u0446<br \/>\nNumber of Channels: 16, 32, 4, 64, 8<br \/>\n\u041a\u043e\u043b\u0438\u0447\u0435\u0441\u0442\u0432\u043e \u0431\u0430\u043d\u043a\u043e\u0432: 1, 16, 2, 4, 8<\/p>","protected":false},"featured_media":31194,"template":"","meta":{"_acf_changed":false},"product_brand":[18],"product_cat":[725],"product_tag":[],"class_list":["post-32506","product","type-product","status-publish","has-post-thumbnail","product_brand-national-instruments","product_cat-pxi-switches","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 v28.1) - 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