{"id":34868,"date":"2026-08-08T12:59:55","date_gmt":"2026-08-08T04:59:55","guid":{"rendered":"https:\/\/pxisource.com\/?post_type=product&#038;p=34868"},"modified":"2026-08-31T15:40:38","modified_gmt":"2026-08-31T07:40:38","slug":"pxi-2531","status":"publish","type":"product","link":"https:\/\/pxisource.com\/ru\/product\/pxi-2531\/","title":{"rendered":"PXI-2531"},"content":{"rendered":"<h3>PXI-2531 512-Crosspoint 1-Wire PXI Matrix Switch Module<\/h3>\n<p>\u0417\u0435\u043c\u043b\u044f <strong>PXI-2531<\/strong> is a high-density PXI matrix switch module designed for automated test systems that must route a large number of low-current signals between instruments and devices under test. It provides 512 crosspoints in a single 3U PXI module and supports several software-selectable 1-wire matrix configurations.<\/p>\n<p>The module uses compact reed relays with a 0.25 ms typical operate time and switching speeds up to 2,000 cycles per second. Its combination of high channel density, hardware triggering, onboard relay-count tracking and deterministic scanning makes it suitable for semiconductor testing, PCB functional testing, data acquisition, design validation and production automation.<\/p>\n<p>The PXI-2531 supports signals up to 60 VDC or 30 VACrms, 0.5 A per channel and 10 W per channel. The original PXI version is no longer available as a new product from NI, but it remains useful for replacing modules in existing PXI test systems.<\/p>\n<h3>Key Features of the PXI-2531<\/h3>\n<ul>\n<li>512 matrix crosspoints in one PXI module<\/li>\n<li>Configurable 1-wire matrix architecture<\/li>\n<li>4 \u00d7 128 matrix topology<\/li>\n<li>8 \u00d7 64 matrix topology<\/li>\n<li>Dual 4 \u00d7 64 matrix topology<\/li>\n<li>Dual 8 \u00d7 32 matrix topology<\/li>\n<li>Sixteen internal 2 \u00d7 16 matrix banks<\/li>\n<li>60 VDC or 30 VACrms maximum switching voltage<\/li>\n<li>0.5 A maximum switching or carry current per channel<\/li>\n<li>10 W maximum switching power per channel<\/li>\n<li>At least 20 MHz typical module bandwidth<\/li>\n<li>0.25 ms relay operate and release time<\/li>\n<li>Up to 2,000 switching cycles per second<\/li>\n<li>Compact electromechanical reed relays<\/li>\n<li>Onboard relay-count tracking<\/li>\n<li>Hardware-triggered deterministic scanning<\/li>\n<li>32,000-step scan-list support<\/li>\n<li>Field-replaceable relay architecture<\/li>\n<li>NI-SWITCH and NI Switch Executive compatibility<\/li>\n<\/ul>\n<h3>PXI-2531 Technical Specifications<\/h3>\n<table>\n<tbody>\n<tr>\n<th>Product Model<\/th>\n<td>PXI-2531<\/td>\n<\/tr>\n<tr>\n<th>Part Number<\/th>\n<td>778572-31<\/td>\n<\/tr>\n<tr>\n<th>Assembly Number<\/th>\n<td>199391-01L<\/td>\n<\/tr>\n<tr>\n<th>Product Type<\/th>\n<td>High-density PXI matrix switch module<\/td>\n<\/tr>\n<tr>\n<th>Number of Crosspoints<\/th>\n<td>512<\/td>\n<\/tr>\n<tr>\n<th>Supported Topologies<\/th>\n<td>1-wire 4 \u00d7 128, 1-wire 8 \u00d7 64, dual 4 \u00d7 64 and dual 8 \u00d7 32<\/td>\n<\/tr>\n<tr>\n<th>Internal Matrix Banks<\/th>\n<td>Sixteen 2 \u00d7 16 banks<\/td>\n<\/tr>\n<tr>\n<th>\u0422\u0438\u043f \u0440\u0435\u043b\u0435<\/th>\n<td>Electromechanical reed relay<\/td>\n<\/tr>\n<tr>\n<th>Maximum Channel-to-Channel Voltage<\/th>\n<td>60 VDC or 30 VACrms<\/td>\n<\/tr>\n<tr>\n<th>Maximum Channel-to-Ground Voltage<\/th>\n<td>60 VDC or 30 VACrms, CAT I<\/td>\n<\/tr>\n<tr>\n<th>Maximum Switching or Carry Current<\/th>\n<td>0,5 \u0410 \u043d\u0430 \u043a\u0430\u043d\u0430\u043b<\/td>\n<\/tr>\n<tr>\n<th>Maximum Switching Power<\/th>\n<td>10 \u0412\u0442 \u043d\u0430 \u043a\u0430\u043d\u0430\u043b<\/td>\n<\/tr>\n<tr>\n<th>Initial DC Path Resistance<\/th>\n<td>Less than 1 \u03a9<\/td>\n<\/tr>\n<tr>\n<th>Open-Channel Resistance<\/th>\n<td>At least 1 \u00d7 10<sup>9<\/sup> \u03a9<\/td>\n<\/tr>\n<tr>\n<th>Typical Bandwidth<\/th>\n<td>At least 20 MHz with 50 \u03a9 termination, module only<\/td>\n<\/tr>\n<tr>\n<th>Relay Operate Time<\/th>\n<td>0.25 ms<\/td>\n<\/tr>\n<tr>\n<th>Relay Release Time<\/th>\n<td>0.25 ms<\/td>\n<\/tr>\n<tr>\n<th>Maximum Scan Rate<\/th>\n<td>2,000 cycles\/s<\/td>\n<\/tr>\n<tr>\n<th>Simultaneous Relay Drive Limit<\/th>\n<td>40 relays for the PXI version<\/td>\n<\/tr>\n<tr>\n<th>Mechanical Relay Life<\/th>\n<td>1 \u00d7 10<sup>9<\/sup> cycles typical, no load<\/td>\n<\/tr>\n<tr>\n<th>Trigger Sources<\/th>\n<td>PXI trigger lines 0 through 7<\/td>\n<\/tr>\n<tr>\n<th>Minimum Input Trigger Pulse Width<\/th>\n<td>150 ns<\/td>\n<\/tr>\n<tr>\n<th>Front Connectors<\/th>\n<td>2 \u00d7 150-position Samtec ERM8 series connectors<\/td>\n<\/tr>\n<tr>\n<th>\u041f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f<\/th>\n<td>NI-SWITCH and NI Switch Executive<\/td>\n<\/tr>\n<tr>\n<th>\u0428\u0438\u043d\u043d\u044b\u0439 \u0438\u043d\u0442\u0435\u0440\u0444\u0435\u0439\u0441<\/th>\n<td>PXI<\/td>\n<\/tr>\n<tr>\n<th>Module Format<\/th>\n<td>Single-slot 3U PXI module<\/td>\n<\/tr>\n<tr>\n<th>Operating Temperature<\/th>\n<td>0\u00b0C to 55\u00b0C<\/td>\n<\/tr>\n<tr>\n<th>Product Status<\/th>\n<td>Discontinued by NI<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>PXI-2531 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-2531<\/td>\n<td>778572-31<\/td>\n<td>512-crosspoint, 1-wire PXI matrix switch module<\/td>\n<\/tr>\n<tr>\n<td>TB-2648<\/td>\n<td>781131-01<\/td>\n<td>Terminal block for configuring the PXI-2531 as a 1-wire 4 \u00d7 128 matrix<\/td>\n<\/tr>\n<tr>\n<td>TB-2649<\/td>\n<td>781131-02<\/td>\n<td>Terminal block for configuring the PXI-2531 as a dual 4 \u00d7 64 matrix<\/td>\n<\/tr>\n<tr>\n<td>TB-2650<\/td>\n<td>781131-03<\/td>\n<td>Terminal block for configuring the PXI-2531 as a 1-wire 8 \u00d7 64 matrix<\/td>\n<\/tr>\n<tr>\n<td>TB-2651<\/td>\n<td>781131-04<\/td>\n<td>Terminal block for configuring the PXI-2531 as a dual 8 \u00d7 32 matrix<\/td>\n<\/tr>\n<tr>\n<td>TBX-68<\/td>\n<td>777141-01<\/td>\n<td>Unshielded 68-pin DIN-rail connector block<\/td>\n<\/tr>\n<tr>\n<td>SHC68-68 Cable<\/td>\n<td>191945-01<\/td>\n<td>1 m shielded 68-pin cable<\/td>\n<\/tr>\n<tr>\n<td>SHC68-68 Cable<\/td>\n<td>191945-02<\/td>\n<td>2 m shielded 68-pin cable<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>The topology-specific TB-2648, TB-2649, TB-2650 and TB-2651 terminal blocks are sold separately. Select the terminal block according to the required row count, column count and whether the application needs one large matrix or two independent matrices.<\/p>\n<h3>512-Crosspoint Matrix Architecture<\/h3>\n<p>The PXI-2531 contains 512 individually controlled crosspoints. A crosspoint is a relay connection between one matrix row and one matrix column. Closing a crosspoint connects the corresponding row and column so that a signal can be routed between an instrument and a test point.<\/p>\n<p>This matrix architecture allows a small number of measurement or stimulus instruments to access hundreds of device-under-test connections without manually moving cables. Multiple crosspoints can be closed when the electrical requirements of the application permit those connections.<\/p>\n<p>Unlike a multiplexer, a matrix is not limited to connecting only one input to one output. It can establish several simultaneous routes, making it useful for complex functional-test fixtures and multidevice test systems.<\/p>\n<h3>Configurable Matrix Topologies<\/h3>\n<p>The PXI-2531 supports four principal topologies through topology-specific terminal blocks and NI-SWITCH configuration. This allows the same switch module to be adapted to different automated-test architectures.<\/p>\n<table>\n<tbody>\n<tr>\n<th>Topology<\/th>\n<th>Recommended Terminal Block<\/th>\n<th>\u0422\u0438\u043f\u0438\u0447\u043d\u043e\u0435 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435<\/th>\n<\/tr>\n<tr>\n<td>1-wire 4 \u00d7 128<\/td>\n<td>TB-2648<\/td>\n<td>Routing four instruments or buses to as many as 128 test points<\/td>\n<\/tr>\n<tr>\n<td>Dual 4 \u00d7 64<\/td>\n<td>TB-2649<\/td>\n<td>Two independent four-row matrices for parallel test sections<\/td>\n<\/tr>\n<tr>\n<td>1-wire 8 \u00d7 64<\/td>\n<td>TB-2650<\/td>\n<td>Routing as many as eight instrument lines to 64 test points<\/td>\n<\/tr>\n<tr>\n<td>Dual 8 \u00d7 32<\/td>\n<td>TB-2651<\/td>\n<td>Two independent eight-row matrices for separate DUT groups<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>4 \u00d7 128 Matrix Configuration<\/h3>\n<p>In the 1-wire 4 \u00d7 128 topology, four matrix rows can connect to any of 128 columns. This is useful when a small group of instruments must measure or stimulate a large number of test points.<\/p>\n<p>For example, a digital multimeter, source, signal generator and load-monitoring channel can share access to a 128-point test fixture. Software determines which crosspoints are closed during each step of the test sequence.<\/p>\n<h3>8 \u00d7 64 Matrix Configuration<\/h3>\n<p>The 1-wire 8 \u00d7 64 configuration provides more instrument-side rows while retaining 64 device-side columns. It is suitable when a DUT must be connected to several different measurement, stimulus or monitoring resources.<\/p>\n<p>The topology remains a single-conductor matrix. Differential or two-conductor measurements require paired routes, careful software control or a switch module specifically designed for 2-wire operation.<\/p>\n<h3>Dual-Matrix Operation<\/h3>\n<p>The dual 4 \u00d7 64 and dual 8 \u00d7 32 topologies divide the module into two independent matrix sections. This enables separate devices, fixtures or instrument groups to operate without electrically connecting the two sections.<\/p>\n<p>Dual-matrix configurations can help organize parallel production tests, separate analog and control signals, or prevent unrelated DUT groups from sharing the same matrix buses.<\/p>\n<h3>Sixteen 2 \u00d7 16 Matrix Banks<\/h3>\n<p>Internally, the PXI-2531 is organized as sixteen 2 \u00d7 16 matrix banks. This bank structure supports the standard topologies and can also be useful when designing custom interconnection accessories.<\/p>\n<p>Custom fixtures must preserve the module\u2019s electrical ratings, connector requirements, shielding and safety limitations. Verify routing behavior and relay-resource names using the NI-SWITCH documentation before developing a custom terminal interface.<\/p>\n<h3>60 V Switching Capability<\/h3>\n<p>The PXI-2531 supports channel-to-channel voltages up to 60 VDC or 30 VACrms. The channel-to-ground limit is also 60 VDC or 30 VACrms for Measurement Category I circuits.<\/p>\n<p>Measurement Category I is intended for protected test and measurement signal circuits that are not directly connected to building mains installations. The module must not be used for CAT II, CAT III or CAT IV mains measurements.<\/p>\n<h3>0.5 A Current and 10 W Power Ratings<\/h3>\n<p>Each channel can switch or carry up to 0.5 A, subject to the simultaneous voltage and power limits. Maximum switching power is 10 W per channel.<\/p>\n<p>The voltage, current and power ratings must all be satisfied at the same time. A circuit operating below 60 V may still exceed the module rating if its current or switching power is too high.<\/p>\n<p>For signals carrying substantial current, include cable, connector, terminal-block and relay resistance when calculating total voltage drop and heat generation.<\/p>\n<h3>Reed Relay Switching<\/h3>\n<p>The PXI-2531 uses compact reed relays to provide fast operation, electrical isolation and good signal performance. Relay operate and release times are approximately 0.25 ms, although the connected signal or measurement instrument may require additional settling time.<\/p>\n<p>Reed relays are particularly suitable for low-current signal routing. They are sensitive to capacitive inrush current and inductive flyback voltage, so appropriate external protection is required when switching reactive loads.<\/p>\n<h3>Relay Life and Load Considerations<\/h3>\n<p>Typical mechanical life is as high as 1 \u00d7 10<sup>9<\/sup> operations when no electrical load is switched. Electrical life depends strongly on voltage, current, load type and switching conditions.<\/p>\n<p>Representative resistive-load life is approximately 1 \u00d7 10<sup>7<\/sup> cycles at 10 V and 100 mA, 5 \u00d7 10<sup>6<\/sup> cycles at 20 V and 500 mA, and 1 \u00d7 10<sup>5<\/sup> cycles at 100 V and 10 mA under the conditions defined in the specifications.<\/p>\n<p>Cold switching, where the signal is removed before changing the relay state, can substantially extend relay life. Although a 100 V relay-life test condition is documented, normal system operation must remain within the PXI-2531 maximum 60 V rating.<\/p>\n<h3>Onboard Relay-Count Tracking<\/h3>\n<p>The PXI-2531 records relay operation counts to help monitor switch usage. Maintenance teams can identify heavily used crosspoints and estimate when preventive inspection or relay replacement may be required.<\/p>\n<p>Relay counts should be interpreted together with the switched load. A relay switching a low-level signal generally experiences less electrical stress than one switching its maximum rated current or a reactive load.<\/p>\n<h3>Field-Replaceable Relays<\/h3>\n<p>The relays used by the PXI-2531 are field replaceable according to the applicable NI service procedure. This can help extend the useful life of a discontinued module when only a small number of crosspoints have degraded.<\/p>\n<p>Relay replacement requires appropriate soldering equipment, ESD precautions, replacement components and post-repair testing. Professional service is recommended when measurement traceability or system validation must be maintained.<\/p>\n<h3>20 MHz Typical Bandwidth<\/h3>\n<p>The module-only 1-wire row-to-column path provides at least 20 MHz typical bandwidth with 50 \u03a9 termination. The complete system bandwidth may be lower after adding a terminal block, cables, fixture wiring and connected loads.<\/p>\n<p>For example, the TB-2648 and TB-2649 terminal-block configurations have topology-dependent bandwidth ratings below the bare module\u2019s typical value. Verify the specifications for the selected accessory when signal frequency is an important requirement.<\/p>\n<h3>Crosstalk and Isolation<\/h3>\n<p>With 50 \u03a9 termination, typical channel-to-channel crosstalk is below -70 dB at 10 kHz and 100 kHz, below -58 dB at 1 MHz and below -38 dB at 10 MHz.<\/p>\n<p>Typical open-channel isolation is greater than 91 dB at 10 kHz, 71 dB at 100 kHz, 51 dB at 1 MHz and 32 dB at 10 MHz. Actual results depend on cables, terminal accessories, source impedance, load impedance and fixture layout.<\/p>\n<p>Keep sensitive low-level signals separated from high-amplitude or fast-transition signals whenever possible. Shielded cables and appropriate grounding help maintain signal integrity.<\/p>\n<h3>Hardware-Triggered Scanning<\/h3>\n<p>The PXI-2531 accepts trigger signals through PXI trigger lines 0 through 7. Hardware triggering allows relay operations to be coordinated with digital multimeters, digitizers, source-measure units and other PXI instruments.<\/p>\n<p>This synchronization can improve test repeatability and throughput because the switch can advance through a predefined scan list without relying entirely on nondeterministic software timing.<\/p>\n<h3>32,000-Step Scan Lists<\/h3>\n<p>A scan list defines a sequence of switch routes that the module executes in response to software commands or hardware triggers. The PXI-2531 supports long scan sequences containing as many as 32,000 steps.<\/p>\n<p>Scan lists are useful when an instrument must measure hundreds of test points in a fixed order. Each step should include sufficient settling time for the relay, connected wiring, signal source and measurement instrument.<\/p>\n<h3>NI-SWITCH Software Support<\/h3>\n<p>The PXI-2531 is controlled through the NI-SWITCH instrument driver. NI-SWITCH provides functions for initializing the module, selecting a topology, connecting and disconnecting routes, configuring triggers, running scan lists and reading relay counts.<\/p>\n<p>The driver supports LabVIEW, LabWindows\/CVI and compatible text-based programming environments. Verify operating-system and driver compatibility when maintaining an older PXI controller.<\/p>\n<h3>NI Switch Executive Integration<\/h3>\n<p>NI Switch Executive allows engineers to define routes using meaningful signal names instead of addressing every physical row, column and crosspoint directly. Named routes can make large matrix-switch applications easier to develop and maintain.<\/p>\n<p>It can also coordinate routes across multiple switch modules. This is useful when several PXI-2531 modules are expanded into a matrix larger than the capacity of one module.<\/p>\n<h3>Expanding the Matrix<\/h3>\n<p>Multiple PXI-2531 modules can be interconnected to increase the number of rows, columns or independent matrix sections. Large systems can support hundreds or thousands of device-side test points.<\/p>\n<p>Matrix expansion introduces additional relay stages, wiring capacitance, path resistance and signal-integrity considerations. The complete expanded path should be characterized rather than assuming the performance of a single module.<\/p>\n<h3>Typical PXI-2531 Applications<\/h3>\n<ul>\n<li>High-channel-count automated test equipment<\/li>\n<li>Printed circuit board functional testing<\/li>\n<li>Semiconductor device validation<\/li>\n<li>Production end-of-line testing<\/li>\n<li>Data acquisition channel scanning<\/li>\n<li>Digital multimeter signal routing<\/li>\n<li>Sensor and transducer testing<\/li>\n<li>Electronic component characterization<\/li>\n<li>Consumer electronics validation<\/li>\n<li>Automotive ECU testing<\/li>\n<li>Hardware-in-the-loop signal routing<\/li>\n<li>Laboratory measurement automation<\/li>\n<li>Parallel DUT testing<\/li>\n<li>Test-fixture signal distribution<\/li>\n<\/ul>\n<h3>Automated Functional Testing<\/h3>\n<p>In a functional-test system, the PXI-2531 can connect measurement instruments and stimulus sources to many points on a circuit board or electronic assembly. Test software changes routes automatically as it progresses through the test procedure.<\/p>\n<p>This reduces fixture complexity and avoids manual cable changes. Named routes and predefined scan lists also make the test sequence easier to review and maintain.<\/p>\n<h3>Data Acquisition and DMM Scanning<\/h3>\n<p>The matrix can connect a digital multimeter or data acquisition instrument to many voltage, resistance or sensor signals. Hardware triggering can coordinate each relay change with the measurement instrument.<\/p>\n<p>Allow adequate settling time after each route change, especially when measuring high-impedance sources, resistance, capacitance or low-level signals.<\/p>\n<h3>Semiconductor and PCB Testing<\/h3>\n<p>The 512-crosspoint architecture is useful for semiconductor characterization and PCB testing where many device pins or board nodes must connect to a smaller collection of instruments.<\/p>\n<p>When several crosspoints are closed simultaneously, verify that the selected routes do not short outputs together or create unintended current paths through the matrix.<\/p>\n<h3>PXI-2531 Troubleshooting<\/h3>\n<h4>The PXI-2531 Is Not Detected in NI MAX<\/h4>\n<p>Confirm that the module is fully seated in a compatible PXI or hybrid slot. Check chassis power, controller communication and NI-SWITCH installation, then power-cycle the system and rescan for hardware in NI MAX.<\/p>\n<h4>The Expected Matrix Topology Is Not Available<\/h4>\n<p>Verify the selected NI-SWITCH topology and installed terminal block. The TB-2648, TB-2649, TB-2650 and TB-2651 correspond to different row, column and dual-matrix configurations.<\/p>\n<h4>A Route Cannot Be Connected<\/h4>\n<p>Check whether the requested route conflicts with another active route. Review the channel names, route specification and topology, then disconnect incompatible paths before attempting the connection again.<\/p>\n<h4>A Channel Has Excessive Resistance<\/h4>\n<p>Measure the complete path, including the relay, terminal block, cable, connector and fixture wiring. Review the relay count and compare the affected path with an unused crosspoint. A worn relay may show rapidly increasing contact resistance.<\/p>\n<h4>The Measurement Does Not Settle<\/h4>\n<p>Add delay after each relay operation. High-impedance sources, long cables, capacitive fixtures and the connected measurement instrument may require more settling time than the relay\u2019s 0.25 ms operate specification.<\/p>\n<h4>The Relay Count Is Unusually High<\/h4>\n<p>Review the test sequence for unnecessary opening and closing operations. Reusing an existing route where safe can reduce relay wear and improve test throughput.<\/p>\n<h4>A Relay Fails Prematurely<\/h4>\n<p>Check for capacitive inrush current, inductive flyback voltage, excessive switching power or operation outside the voltage and current ratings. Use current limiting, snubbers or other appropriate protection.<\/p>\n<h4>The Signal Has Excessive Crosstalk<\/h4>\n<p>Use shielded accessories, shorten external wiring and separate high-level signals from sensitive channels. Confirm that source and load impedances match the conditions used for the published specifications.<\/p>\n<h4>The Hardware-Triggered Scan Does Not Advance<\/h4>\n<p>Verify the selected PXI trigger line, trigger direction and pulse width. Confirm that the source instrument is exporting the trigger and that the PXI-2531 scan list has been initiated before the first trigger arrives.<\/p>\n<h3>PXI-2531 Comparison with Similar Matrix Switch Modules<\/h3>\n<table>\n<tbody>\n<tr>\n<th>\u041c\u043e\u0434\u0435\u043b\u044c<\/th>\n<th>Primary Configuration<\/th>\n<th>Best Suited For<\/th>\n<\/tr>\n<tr>\n<td>PXI-2531<\/td>\n<td>512 crosspoints, 60 V, 0.5 A, configurable 1-wire matrix<\/td>\n<td>Maintaining high-density legacy PXI matrix systems<\/td>\n<\/tr>\n<tr>\n<td>PXIe-2531<\/td>\n<td>512 crosspoints, 60 V, 0.5 A, PXI Express interface<\/td>\n<td>Current PXI Express systems requiring the same matrix architecture<\/td>\n<\/tr>\n<tr>\n<td>PXI-2532B<\/td>\n<td>512-crosspoint matrix with higher voltage capability<\/td>\n<td>Matrix routing requiring higher switching voltage<\/td>\n<\/tr>\n<tr>\n<td>PXIe-2532B<\/td>\n<td>High-density PXI Express matrix with configurable topologies<\/td>\n<td>Modern high-density and higher-voltage matrix systems<\/td>\n<\/tr>\n<tr>\n<td>PXI-2530B<\/td>\n<td>Multiplexer and matrix configurations<\/td>\n<td>Applications needing multiple switching topologies<\/td>\n<\/tr>\n<tr>\n<td>\u041f\u0425\u0418-2503<\/td>\n<td>Multiplexer and matrix switch architecture<\/td>\n<td>General-purpose low-current signal routing<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>PXI-2531 vs PXIe-2531<\/h3>\n<p>The PXI-2531 and PXIe-2531 provide the same basic 512-crosspoint matrix architecture, supported topologies and 60 V, 0.5 A electrical ratings. The primary difference is the chassis bus interface.<\/p>\n<p>The PXI-2531 uses the traditional PXI interface and can simultaneously drive as many as 40 relays. The PXIe-2531 uses PXI Express, has part number 780587-31 and can simultaneously drive as many as 64 relays.<\/p>\n<p>Select the PXI-2531 when maintaining an existing validated PXI installation. Choose the PXIe-2531 for a new PXI Express system or when additional simultaneous relay drive capability is required.<\/p>\n<h3>PXI-2531 vs PXI-2532B<\/h3>\n<p>The PXI-2531 supports up to 60 VDC or 30 VACrms, while the PXI-2532B family is designed for higher-voltage matrix-switching requirements. Both provide high crosspoint density and configurable matrix topologies.<\/p>\n<p>Select the PXI-2531 for low-current signal routing within its 60 V limit. Consider the PXI-2532B when the application requires greater voltage capacity or its available terminal-block configurations.<\/p>\n<h3>Recommended Related Products<\/h3>\n<ul>\n<li><a href=\"https:\/\/pxisource.com\/ru\/product\/pxie-2531\/\">PXIe-2531 512-Crosspoint PXI Express Matrix Switch Module<\/a><\/li>\n<li><a href=\"https:\/\/pxisource.com\/ru\/product\/pxi-2532b\/\">PXI-2532B High-Density Matrix Switch Module<\/a><\/li>\n<li><a href=\"https:\/\/pxisource.com\/ru\/product\/pxie-2532b\/\">PXIe-2532B High-Density PXI Express Matrix Switch Module<\/a><\/li>\n<li><a href=\"https:\/\/pxisource.com\/ru\/product\/pxi-2530b\/\">PXI-2530B Multiplexer and Matrix Switch Module<\/a><\/li>\n<li><a href=\"https:\/\/pxisource.com\/ru\/product\/pxi-2503\/\">PXI-2503 Multiplexer and Matrix Switch Module<\/a><\/li>\n<li><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\/\">View More NI PXI and PXI Express Modules<\/a><\/li>\n<\/ul>\n<h3>Selecting the Right Matrix Switch Module<\/h3>\n<p>Choose the PXI-2531 when the application requires 512 crosspoints, configurable 1-wire topologies, fast reed-relay operation and compatibility with an existing PXI system. It is particularly useful as a direct replacement in previously validated test platforms.<\/p>\n<p>Choose the PXIe-2531 for the corresponding PXI Express implementation. Consider the PXI-2532B or PXIe-2532B when higher voltage capability is required, or the PXI-2530B when the application benefits from additional multiplexer and matrix configurations.<\/p>\n<h3>Why Choose the PXI-2531?<\/h3>\n<ul>\n<li>Provides 512 crosspoints in a single PXI slot<\/li>\n<li>Supports four useful matrix configurations<\/li>\n<li>Routes as many as 128 device-side columns<\/li>\n<li>Offers fast 0.25 ms reed-relay operation<\/li>\n<li>Supports up to 2,000 switching cycles per second<\/li>\n<li>Handles signals up to 60 V and 0.5 A<\/li>\n<li>Provides at least 20 MHz typical module bandwidth<\/li>\n<li>Includes relay-count monitoring<\/li>\n<li>Supports long hardware-triggered scan lists<\/li>\n<li>Integrates with NI-SWITCH and NI Switch Executive<\/li>\n<\/ul>\n<h3>Frequently Asked Questions<\/h3>\n<h4>What is the PXI-2531?<\/h4>\n<p>The PXI-2531 is a high-density, 512-crosspoint PXI matrix switch module for routing low-current signals in automated test and measurement systems.<\/p>\n<h4>What is the PXI-2531 part number?<\/h4>\n<p>The standard NI part number for the PXI-2531 is <strong>778572-31<\/strong>. The PXIe-2531 is a different model with part number 780587-31.<\/p>\n<h4>Which matrix topologies are supported?<\/h4>\n<p>The module supports a 1-wire 4 \u00d7 128 matrix, a 1-wire 8 \u00d7 64 matrix, a dual 4 \u00d7 64 matrix and a dual 8 \u00d7 32 matrix.<\/p>\n<h4>How many crosspoints does it provide?<\/h4>\n<p>The PXI-2531 provides 512 relay crosspoints.<\/p>\n<h4>What is the maximum switching voltage?<\/h4>\n<p>The maximum switching voltage is 60 VDC or 30 VACrms for channel-to-channel and channel-to-ground connections.<\/p>\n<h4>What is the maximum channel current?<\/h4>\n<p>The maximum switching or carry current is 0.5 A per channel, subject to the 10 W maximum switching-power limit.<\/p>\n<h4>What is the PXI-2531 bandwidth?<\/h4>\n<p>The module-only 1-wire row-to-column path provides at least 20 MHz typical bandwidth with 50 \u03a9 termination. Terminal blocks and external wiring may reduce total system bandwidth.<\/p>\n<h4>How fast are the relays?<\/h4>\n<p>Typical relay operate and release times are 0.25 ms. The specified maximum scanning rate is 2,000 cycles per second.<\/p>\n<h4>Which terminal block is required?<\/h4>\n<p>Use the TB-2648 for 4 \u00d7 128, TB-2649 for dual 4 \u00d7 64, TB-2650 for 8 \u00d7 64 or TB-2651 for dual 8 \u00d7 32 operation.<\/p>\n<h4>Can the PXI-2531 perform differential measurements?<\/h4>\n<p>The standard topologies are described as 1-wire matrices. Differential signals can be routed using coordinated pairs of paths, but the software and fixture must prevent incomplete or conflicting connections.<\/p>\n<h4>Does the module support relay-count tracking?<\/h4>\n<p>Yes. Onboard relay-count tracking helps monitor crosspoint usage and plan maintenance.<\/p>\n<h4>Is the PXI-2531 still available from NI?<\/h4>\n<p>No. NI identifies the original PXI-2531 as no longer available. Used, refurbished and new-surplus units may remain available through specialized test-equipment suppliers.<\/p>\n<h3>Request a Quote for the PXI-2531<\/h3>\n<p>Contact us for current availability, condition, calibration options and project pricing for the <strong>PXI-2531 512-Crosspoint Matrix Switch Module<\/strong>. We can also help identify compatible TB-2648, TB-2649, TB-2650 and TB-2651 terminal blocks, replacement PXIe-2531 modules and related NI matrix switches.<\/p>","protected":false},"excerpt":{"rendered":"<p>PXI-2531 512-Crosspoint 1-Wire PXI Matrix Switch Module The PXI-2531 is a high-density PXI matrix switch module designed for automated test<\/p>","protected":false},"featured_media":34806,"template":"","meta":{"_acf_changed":false},"product_brand":[18],"product_cat":[667],"product_tag":[],"class_list":["post-34868","product","type-product","status-publish","has-post-thumbnail","product_brand-national-instruments","product_cat-pxi-modules","first","instock","shipping-taxable","product-type-simple"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.0 (Yoast SEO v28.1) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>NI PXI-2531 PXI Matrix Switch Module 778572-31, In Stock | Project Pricing<\/title>\n<meta name=\"description\" content=\"The PXI-2531 is a 512-crosspoint PXI matrix switch with configurable 1-wire topologies, 60 V switching and fast 0.5 A reed relays.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/pxisource.com\/ru\/product\/pxi-2531\/\" \/>\n<meta property=\"og:locale\" content=\"ru_RU\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PXI-2531\" \/>\n<meta property=\"og:description\" content=\"The PXI-2531 is a 512-crosspoint PXI matrix switch with configurable 1-wire topologies, 60 V switching and fast 0.5 A reed relays.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/pxisource.com\/ru\/product\/pxi-2531\/\" \/>\n<meta property=\"og:site_name\" content=\"PXI Source\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/profile.php?id=61582573040385\" \/>\n<meta property=\"article:modified_time\" content=\"2026-08-31T07:40:38+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/pxisource.com\/wp-content\/uploads\/2026\/08\/PXI-2531.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"800\" \/>\n\t<meta property=\"og:image:height\" content=\"800\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u0426\u0435\u043d\u0430\" \/>\n\t<meta name=\"twitter:data1\" content=\"\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u0414\u043e\u0441\u0442\u0443\u043f\u043d\u043e\u0441\u0442\u044c\" \/>\n\t<meta name=\"twitter:data2\" content=\"\u0412 \u043d\u0430\u043b\u0438\u0447\u0438\u0438\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/pxisource.com\\\/product\\\/pxi-2531\\\/\",\"url\":\"https:\\\/\\\/pxisource.com\\\/product\\\/pxi-2531\\\/\",\"name\":\"NI PXI-2531 PXI Matrix Switch Module 778572-31, In Stock | Project Pricing\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/pxisource.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/pxisource.com\\\/product\\\/pxi-2531\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/pxisource.com\\\/product\\\/pxi-2531\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/pxisource.com\\\/wp-content\\\/uploads\\\/2026\\\/08\\\/PXI-2531.webp\",\"datePublished\":\"2026-08-08T04:59:55+00:00\",\"dateModified\":\"2026-08-31T07:40:38+00:00\",\"description\":\"The PXI-2531 is a 512-crosspoint PXI matrix switch with configurable 1-wire topologies, 60 V switching and fast 0.5 A reed relays.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/pxisource.com\\\/product\\\/pxi-2531\\\/#breadcrumb\"},\"inLanguage\":\"ru-RU\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/pxisource.com\\\/product\\\/pxi-2531\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"ru-RU\",\"@id\":\"https:\\\/\\\/pxisource.com\\\/product\\\/pxi-2531\\\/#primaryimage\",\"url\":\"https:\\\/\\\/pxisource.com\\\/wp-content\\\/uploads\\\/2026\\\/08\\\/PXI-2531.webp\",\"contentUrl\":\"https:\\\/\\\/pxisource.com\\\/wp-content\\\/uploads\\\/2026\\\/08\\\/PXI-2531.webp\",\"width\":800,\"height\":800,\"caption\":\"PXI-2531\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/pxisource.com\\\/product\\\/pxi-2531\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/pxisource.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"\u5546\u5e97\",\"item\":\"https:\\\/\\\/pxisource.com\\\/shop\\\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"PXI-2531\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/pxisource.com\\\/#website\",\"url\":\"https:\\\/\\\/pxisource.com\\\/\",\"name\":\"PXI Systems\",\"description\":\"PXI, PXIe and Modular Test Equipment\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/pxisource.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"ru-RU\"}]}<\/script>\n<meta property=\"product:brand\" content=\"National Instruments\" \/>\n<meta property=\"product:price:currency\" content=\"USD\" \/>\n<meta property=\"og:availability\" content=\"instock\" \/>\n<meta property=\"product:availability\" content=\"instock\" \/>\n<meta property=\"product:condition\" content=\"new\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"NI PXI-2531 PXI Matrix Switch Module 778572-31, In Stock | Project Pricing","description":"The PXI-2531 is a 512-crosspoint PXI matrix switch with configurable 1-wire topologies, 60 V switching and fast 0.5 A reed relays.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/pxisource.com\/ru\/product\/pxi-2531\/","og_locale":"ru_RU","og_type":"article","og_title":"PXI-2531","og_description":"The PXI-2531 is a 512-crosspoint PXI matrix switch with configurable 1-wire topologies, 60 V switching and fast 0.5 A reed relays.","og_url":"https:\/\/pxisource.com\/ru\/product\/pxi-2531\/","og_site_name":"PXI Source","article_publisher":"https:\/\/www.facebook.com\/profile.php?id=61582573040385","article_modified_time":"2026-08-31T07:40:38+00:00","og_image":[{"width":800,"height":800,"url":"https:\/\/pxisource.com\/wp-content\/uploads\/2026\/08\/PXI-2531.webp","type":"image\/webp"}],"twitter_card":"summary_large_image","twitter_misc":{"\u0426\u0435\u043d\u0430":"","\u0414\u043e\u0441\u0442\u0443\u043f\u043d\u043e\u0441\u0442\u044c":"\u0412 \u043d\u0430\u043b\u0438\u0447\u0438\u0438"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/pxisource.com\/product\/pxi-2531\/","url":"https:\/\/pxisource.com\/product\/pxi-2531\/","name":"NI PXI-2531 PXI Matrix Switch Module 778572-31, In Stock | Project Pricing","isPartOf":{"@id":"https:\/\/pxisource.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/pxisource.com\/product\/pxi-2531\/#primaryimage"},"image":{"@id":"https:\/\/pxisource.com\/product\/pxi-2531\/#primaryimage"},"thumbnailUrl":"https:\/\/pxisource.com\/wp-content\/uploads\/2026\/08\/PXI-2531.webp","datePublished":"2026-08-08T04:59:55+00:00","dateModified":"2026-08-31T07:40:38+00:00","description":"The PXI-2531 is a 512-crosspoint PXI matrix switch with configurable 1-wire topologies, 60 V switching and fast 0.5 A reed relays.","breadcrumb":{"@id":"https:\/\/pxisource.com\/product\/pxi-2531\/#breadcrumb"},"inLanguage":"ru-RU","potentialAction":[{"@type":"ReadAction","target":["https:\/\/pxisource.com\/product\/pxi-2531\/"]}]},{"@type":"ImageObject","inLanguage":"ru-RU","@id":"https:\/\/pxisource.com\/product\/pxi-2531\/#primaryimage","url":"https:\/\/pxisource.com\/wp-content\/uploads\/2026\/08\/PXI-2531.webp","contentUrl":"https:\/\/pxisource.com\/wp-content\/uploads\/2026\/08\/PXI-2531.webp","width":800,"height":800,"caption":"PXI-2531"},{"@type":"BreadcrumbList","@id":"https:\/\/pxisource.com\/product\/pxi-2531\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/pxisource.com\/"},{"@type":"ListItem","position":2,"name":"\u5546\u5e97","item":"https:\/\/pxisource.com\/shop\/"},{"@type":"ListItem","position":3,"name":"PXI-2531"}]},{"@type":"WebSite","@id":"https:\/\/pxisource.com\/#website","url":"https:\/\/pxisource.com\/","name":"\u0421\u0438\u0441\u0442\u0435\u043c\u044b PXI","description":"PXI, PXIe and Modular Test Equipment","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/pxisource.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"ru-RU"}]},"product_brand":"National Instruments","product_price_currency":"USD","og_availability":"instock","product_availability":"instock","product_condition":"new"},"_links":{"self":[{"href":"https:\/\/pxisource.com\/ru\/wp-json\/wp\/v2\/product\/34868","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pxisource.com\/ru\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pxisource.com\/ru\/wp-json\/wp\/v2\/types\/product"}],"version-history":[{"count":3,"href":"https:\/\/pxisource.com\/ru\/wp-json\/wp\/v2\/product\/34868\/revisions"}],"predecessor-version":[{"id":35883,"href":"https:\/\/pxisource.com\/ru\/wp-json\/wp\/v2\/product\/34868\/revisions\/35883"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pxisource.com\/ru\/wp-json\/wp\/v2\/media\/34806"}],"wp:attachment":[{"href":"https:\/\/pxisource.com\/ru\/wp-json\/wp\/v2\/media?parent=34868"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/pxisource.com\/ru\/wp-json\/wp\/v2\/product_brand?post=34868"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pxisource.com\/ru\/wp-json\/wp\/v2\/product_cat?post=34868"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pxisource.com\/ru\/wp-json\/wp\/v2\/product_tag?post=34868"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}