{"id":34521,"date":"2026-08-07T12:25:10","date_gmt":"2026-08-07T04:25:10","guid":{"rendered":"https:\/\/pxisource.com\/?post_type=product&#038;p=34521"},"modified":"2026-08-27T18:26:57","modified_gmt":"2026-08-27T10:26:57","slug":"pci-6520","status":"publish","type":"product","link":"https:\/\/pxisource.com\/ru\/product\/pci-6520\/","title":{"rendered":"PCI-6520"},"content":{"rendered":"<h3>Product Introduction<\/h3>\n<p>\n\u0417\u0435\u043c\u043b\u044f <strong>NI PCI-6520<\/strong> \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f <strong>bank-isolated industrial digital I\/O device<\/strong> designed for PCI-based automation, equipment control, manufacturing test, and industrial monitoring applications. It combines <strong>8 isolated digital input channels with 8 electromechanical relay output channels<\/strong> on a single PCI device.\n<\/p>\n<p>\nUnlike industrial digital I\/O devices that use transistor source or sink outputs, the PCI-6520 provides <strong>electromechanical relay outputs<\/strong>. These relay contacts provide flexible switching capability for compatible AC and DC signals and make the PCI-6520 particularly useful for test fixtures, external equipment control, alarm systems, industrial automation, and applications requiring contact-based switching.\n<\/p>\n<p>\nThe combination of isolated digital inputs and relay outputs allows the PCI-6520 to monitor external equipment states while independently switching compatible loads and control circuits.\n<\/p>\n<h3>Product Overview<\/h3>\n<p>\n\u0417\u0435\u043c\u043b\u044f <strong>National Instruments PCI-6520<\/strong> belongs to the NI industrial digital I\/O family and is designed for applications requiring a combination of discrete input monitoring and relay-based switching.\n<\/p>\n<p>\nA typical input architecture is:\n<\/p>\n<p>\n<strong>Industrial Sensor \/ Switch \/ Equipment Signal \u2192 Isolated Digital Input \u2192 PCI-6520 \u2192 PCI Bus \u2192 Host Application<\/strong>\n<\/p>\n<p>\nFor output switching:\n<\/p>\n<p>\n<strong>Host Application \u2192 PCI Bus \u2192 PCI-6520 \u2192 Electromechanical Relay \u2192 External Circuit \/ Load<\/strong>\n<\/p>\n<p>\nThis architecture is particularly useful when the controlled circuit should be electrically separated from the host computer and when relay contacts are preferred over semiconductor digital outputs.\n<\/p>\n<h3>Key Features<\/h3>\n<h4>8 Industrial Digital Inputs<\/h4>\n<p>\nThe PCI-6520 provides <strong>8 \u0438\u0437\u043e\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u0446\u0438\u0444\u0440\u043e\u0432\u044b\u0445 \u0432\u0445\u043e\u0434\u043e\u0432<\/strong> for monitoring compatible industrial field signals.\n<\/p>\n<p>\nTypical input applications include:\n<\/p>\n<ul>\n<li>Limit switches<\/li>\n<li>Proximity sensors<\/li>\n<li>Machine status signals<\/li>\n<li>Alarm contacts<\/li>\n<li>Push buttons<\/li>\n<li>Interlock signals<\/li>\n<li>Test fixture status<\/li>\n<li>Equipment-ready signals<\/li>\n<\/ul>\n<h4>8 Electromechanical Relay Outputs<\/h4>\n<p>\nThe PCI-6520 provides <strong>8 electromechanical relay output channels<\/strong>.\n<\/p>\n<p>\nUnlike transistor-based digital outputs, relay outputs operate through physical contacts. This allows the output circuit to switch compatible external electrical signals without requiring the same source\/sink topology used by semiconductor outputs.\n<\/p>\n<p>\nTypical relay-output applications include:\n<\/p>\n<ul>\n<li>External equipment switching<\/li>\n<li>Relay and contactor control circuits<\/li>\n<li>Test fixture switching<\/li>\n<li>Alarm control<\/li>\n<li>Indicator control<\/li>\n<li>\u041f\u0440\u043e\u043c\u044b\u0448\u043b\u0435\u043d\u043d\u043e\u0435 \u0443\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u0447\u0435\u0441\u043a\u0438\u043c\u0438 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0430\u043c\u0438<\/li>\n<li>Automated test sequencing<\/li>\n<li>Power circuit control through appropriate external interfaces<\/li>\n<\/ul>\n<h4>16 Total Industrial I\/O Channels<\/h4>\n<p>\nThe PCI-6520 provides a total of <strong>16 dedicated I\/O channels<\/strong> consisting of:\n<\/p>\n<ul>\n<li>8 digital inputs<\/li>\n<li>8 relay outputs<\/li>\n<\/ul>\n<p>\nThis configuration is useful when an application requires approximately equal numbers of monitoring and switching channels.\n<\/p>\n<h4>Bank-Isolated Architecture<\/h4>\n<p>\nThe PCI-6520 uses an <strong>isolated industrial I\/O architecture<\/strong> designed to provide electrical separation between external field signals and the computer-side system.\n<\/p>\n<p>\nIsolation can help reduce problems associated with:\n<\/p>\n<ul>\n<li>Ground loops<\/li>\n<li>Ground-potential differences<\/li>\n<li>Electrical noise<\/li>\n<li>Switching transients<\/li>\n<li>Industrial machinery interference<\/li>\n<li>Multiple external power systems<\/li>\n<\/ul>\n<h4>Relay-Based Switching<\/h4>\n<p>\nRelay outputs are one of the most important characteristics of the PCI-6520.\n<\/p>\n<p>\nA relay contact functions as an electrically controlled switch. Depending on the application and wiring configuration, relay contacts can be used to switch compatible AC or DC circuits within the specified voltage, current, and power ratings.\n<\/p>\n<p>\nThis makes the PCI-6520 different from NI 651x industrial digital I\/O devices that use solid-state sourcing or sinking outputs.\n<\/p>\n<h4>Electrical Isolation Between Control and Load<\/h4>\n<p>\nThe electromechanical relay architecture provides galvanic separation between the relay coil\/control circuitry and the switched contact circuit.\n<\/p>\n<p>\nThis is useful when the external circuit has a different ground reference from the computer or digital control system.\n<\/p>\n<h4>Industrial Signal Monitoring<\/h4>\n<p>\nThe isolated digital inputs allow the PCI-6520 to monitor compatible industrial signals from sensors, machines, fixtures, and external equipment.\n<\/p>\n<p>\nThe device can therefore perform both monitoring and switching within the same automated system.\n<\/p>\n<h4>PCI Interface<\/h4>\n<p>\nThe PCI-6520 installs into a compatible conventional <strong>PCI slot<\/strong> in a desktop, workstation, rackmount, or industrial computer.\n<\/p>\n<p>\nThe PCI interface makes the device particularly relevant for maintenance and replacement of existing industrial control and automated test systems.\n<\/p>\n<h4>Software-Controlled I\/O<\/h4>\n<p>\nThe PCI-6520 can be integrated into computer-based monitoring and control applications using compatible National Instruments software and drivers.\n<\/p>\n<p>\nSoftware can monitor the digital input states and command individual relay outputs according to the required test or automation sequence.\n<\/p>\n<h3>Technical Specifications<\/h3>\n<table>\n<tr>\n<th>\u041f\u0430\u0440\u0430\u043c\u0435\u0442\u0440<\/th>\n<th>\u0421\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f<\/th>\n<\/tr>\n<tr>\n<td width=\"280\">Product Type<\/td>\n<td>Industrial Digital I\/O Device<\/td>\n<\/tr>\n<tr>\n<td>\u041c\u043e\u0434\u0435\u043b\u044c<\/td>\n<td>PCI-6520<\/td>\n<\/tr>\n<tr>\n<td>Manufacturer<\/td>\n<td>\u041d\u0430\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u044b\u0435 \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u044b<\/td>\n<\/tr>\n<tr>\n<td>\u0428\u0438\u043d\u043d\u044b\u0439 \u0438\u043d\u0442\u0435\u0440\u0444\u0435\u0439\u0441<\/td>\n<td>PCI<\/td>\n<\/tr>\n<tr>\n<td>Total I\/O Channels<\/td>\n<td>16<\/td>\n<\/tr>\n<tr>\n<td>Digital Input Channels<\/td>\n<td>8<\/td>\n<\/tr>\n<tr>\n<td>Digital Output Channels<\/td>\n<td>8<\/td>\n<\/tr>\n<tr>\n<td>\u0422\u0438\u043f \u0432\u044b\u0432\u043e\u0434\u0430<\/td>\n<td>Electromechanical Relay<\/td>\n<\/tr>\n<tr>\n<td>Digital Input Type<\/td>\n<td>Industrial Digital Input<\/td>\n<\/tr>\n<tr>\n<td>\u0418\u0437\u043e\u043b\u044f\u0446\u0438\u044f<\/td>\n<td>Isolated Industrial I\/O<\/td>\n<\/tr>\n<tr>\n<td>Output Switching<\/td>\n<td>Relay Contact Switching<\/td>\n<\/tr>\n<tr>\n<td>Analog Input<\/td>\n<td>No<\/td>\n<\/tr>\n<tr>\n<td>Analog Output<\/td>\n<td>No<\/td>\n<\/tr>\n<tr>\n<td>Host Platform<\/td>\n<td>PCI-Based Computer<\/td>\n<\/tr>\n<tr>\n<td>Primary Function<\/td>\n<td>Industrial Digital Monitoring and Relay Switching<\/td>\n<\/tr>\n<tr>\n<td>\u0422\u0438\u043f\u0438\u0447\u043d\u044b\u0435 \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u044f<\/td>\n<td>Automation, Manufacturing Test, Equipment Control and Test Fixtures<\/td>\n<\/tr>\n<\/table>\n<h3>How Does the PCI-6520 Work?<\/h3>\n<p>\nThe PCI-6520 combines isolated digital signal monitoring with software-controlled electromechanical switching.\n<\/p>\n<p>\nFor digital input:\n<\/p>\n<p>\n<strong>Sensor \/ Switch \/ Machine Signal \u2192 Isolated Input \u2192 PCI-6520 \u2192 PCI Bus \u2192 Application<\/strong>\n<\/p>\n<p>\nFor relay output:\n<\/p>\n<p>\n<strong>Application \u2192 PCI Bus \u2192 PCI-6520 Relay Driver \u2192 Relay Contact \u2192 External Circuit<\/strong>\n<\/p>\n<p>\nThe host application can monitor input conditions and open or close relay contacts according to programmed logic.\n<\/p>\n<h3>What Is an Electromechanical Relay Output?<\/h3>\n<p>\nAn electromechanical relay uses an electrically controlled mechanism to physically change the state of electrical contacts.\n<\/p>\n<p>\nIn simplified form:\n<\/p>\n<p>\n<strong>Control Signal \u2192 Relay Coil \/ Driver \u2192 Mechanical Contact \u2192 External Circuit<\/strong>\n<\/p>\n<p>\nBecause the switched circuit is connected through relay contacts rather than directly through a semiconductor output stage, relay outputs provide useful flexibility for industrial control and automated test applications.\n<\/p>\n<h3>Relay Output vs Transistor Digital Output<\/h3>\n<table>\n<tr>\n<th>\u0424\u0443\u043d\u043a\u0446\u0438\u044f<\/th>\n<th>Relay Output<\/th>\n<th>Transistor Output<\/th>\n<\/tr>\n<tr>\n<td>\u0421\u043c\u0435\u043d\u0430 \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u0439<\/td>\n<td>Mechanical Contacts<\/td>\n<td>\u041f\u043e\u043b\u0443\u043f\u0440\u043e\u0432\u043e\u0434\u043d\u0438\u043a<\/td>\n<\/tr>\n<tr>\n<td>Electrical Isolation<\/td>\n<td><strong>Inherent Contact Isolation<\/strong><\/td>\n<td>Depends on Device<\/td>\n<\/tr>\n<tr>\n<td>AC Switching<\/td>\n<td><strong>Possible Within Ratings<\/strong><\/td>\n<td>Often DC Only<\/td>\n<\/tr>\n<tr>\n<td>DC Switching<\/td>\n<td>Yes, Within Ratings<\/td>\n<td>Yes, Within Ratings<\/td>\n<\/tr>\n<tr>\n<td>\u0421\u043a\u043e\u0440\u043e\u0441\u0442\u044c \u043f\u0435\u0440\u0435\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f<\/td>\n<td>\u041c\u0435\u0434\u043b\u0435\u043d\u043d\u0435\u0435<\/td>\n<td><strong>Faster<\/strong><\/td>\n<\/tr>\n<tr>\n<td>Mechanical Wear<\/td>\n<td>\u0414\u0430<\/td>\n<td>\u041e\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u0438\u0435 \u043c\u0435\u0445\u0430\u043d\u0438\u0447\u0435\u0441\u043a\u043e\u0433\u043e \u0438\u0437\u043d\u043e\u0441\u0430<\/td>\n<\/tr>\n<tr>\n<td>Switching Life<\/td>\n<td>Finite Mechanical\/Electrical Life<\/td>\n<td>Typically Higher Cycle Capability<\/td>\n<\/tr>\n<tr>\n<td>Typical Application<\/td>\n<td>Equipment and Load Switching<\/td>\n<td>High-Speed Digital Control<\/td>\n<\/tr>\n<\/table>\n<p>\nThe PCI-6520 is particularly appropriate when relay contact switching is more important than high-speed digital output operation.\n<\/p>\n<h3>Why Choose Relay Outputs?<\/h3>\n<p>\nRelay outputs can be advantageous when the application requires:\n<\/p>\n<ul>\n<li>Contact-based switching<\/li>\n<li>Electrical separation from the host system<\/li>\n<li>Switching of compatible AC signals<\/li>\n<li>Switching of compatible DC signals<\/li>\n<li>Interfacing with equipment requiring contact closure<\/li>\n<li>Control of external relay or contactor circuits<\/li>\n<\/ul>\n<p>\nThe load must always remain within the relay contact voltage, current, and switching-power specifications.\n<\/p>\n<h3>Dry Contact Applications<\/h3>\n<p>\nRelay outputs are useful in systems where external equipment expects a contact closure rather than a transistor voltage output.\n<\/p>\n<p>\nTypical examples include:\n<\/p>\n<ul>\n<li>Equipment start\/stop contacts<\/li>\n<li>Alarm inputs<\/li>\n<li>External interlocks<\/li>\n<li>Industrial controller inputs<\/li>\n<li>Test fixture interfaces<\/li>\n<li>Remote control terminals<\/li>\n<\/ul>\n<p>\nThe exact wiring configuration should be verified against the external equipment and PCI-6520 relay specifications.\n<\/p>\n<h3>Industrial Digital Input Applications<\/h3>\n<p>\nThe eight digital inputs can monitor discrete field signals from compatible industrial equipment.\n<\/p>\n<p>\n\u041d\u0430\u043f\u0440\u0438\u043c\u0435\u0440:\n<\/p>\n<p>\n<strong>DI 0 \u2192 Machine Ready<\/strong><br \/>\n<strong>DI 1 \u2192 Product Present<\/strong><br \/>\n<strong>DI 2 \u2192 Door Status<\/strong><br \/>\n<strong>DI 3 \u2192 Fixture Locked<\/strong><br \/>\n<strong>DI 4 \u2192 Alarm Status<\/strong><br \/>\n<strong>DI 5 \u2192 Cycle Complete<\/strong>\n<\/p>\n<p>\nThe remaining channels can be assigned according to the machine or test-system architecture.\n<\/p>\n<h3>Equipment Control<\/h3>\n<p>\nThe relay outputs can switch compatible external control circuits according to commands from application software.\n<\/p>\n<p>\nA typical control sequence is:\n<\/p>\n<p>\n<strong>Read Input \u2192 Evaluate Condition \u2192 Command Relay \u2192 Switch External Circuit<\/strong>\n<\/p>\n<p>\nThis allows the PCI-6520 to provide basic computer-controlled sequencing for industrial and automated test systems.\n<\/p>\n<h3>\u0410\u0432\u0442\u043e\u043c\u0430\u0442\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0435 \u0438\u0441\u043f\u044b\u0442\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u0435 \u0441\u0438\u0441\u0442\u0435\u043c\u044b<\/h3>\n<p>\nThe PCI-6520 is useful in automated test systems requiring a combination of industrial status monitoring and relay switching.\n<\/p>\n<p>\nA typical test sequence can:\n<\/p>\n<ol>\n<li>Initialize the PCI-6520.<\/li>\n<li>Read fixture status inputs.<\/li>\n<li>Confirm the device under test is installed.<\/li>\n<li>Close the required relay outputs.<\/li>\n<li>Enable external test equipment.<\/li>\n<li>Monitor DUT status signals.<\/li>\n<li>Execute the test sequence.<\/li>\n<li>Open or close relays according to the results.<\/li>\n<li>Return the fixture to its required state.<\/li>\n<\/ol>\n<h3>Test Fixture Control<\/h3>\n<p>\nAutomated test fixtures frequently require both digital sensing and switching.\n<\/p>\n<p>\nThe PCI-6520 can be used to:\n<\/p>\n<ul>\n<li>Detect fixture position<\/li>\n<li>Monitor interlocks<\/li>\n<li>Detect DUT presence<\/li>\n<li>Switch external circuits<\/li>\n<li>Control indicators<\/li>\n<li>Enable test equipment<\/li>\n<li>Control auxiliary relays<\/li>\n<li>Manage test sequencing<\/li>\n<\/ul>\n<h3>Manufacturing Test<\/h3>\n<p>\nManufacturing test systems can use the PCI-6520 as an interface between test software and production equipment.\n<\/p>\n<p>\nIts combination of isolated digital inputs and electromechanical relay outputs is particularly useful when the test station must monitor industrial signals and provide physical contact switching.\n<\/p>\n<h3>Machine Monitoring<\/h3>\n<p>\nThe PCI-6520 digital inputs can monitor:\n<\/p>\n<ul>\n<li>Machine-ready signals<\/li>\n<li>Limit switches<\/li>\n<li>Proximity sensors<\/li>\n<li>Alarm conditions<\/li>\n<li>Equipment interlocks<\/li>\n<li>Cycle-complete signals<\/li>\n<li>Fixture status<\/li>\n<li>Production sensors<\/li>\n<\/ul>\n<h3>Machine Control<\/h3>\n<p>\nThe relay outputs can control compatible machine-interface circuits and external equipment.\n<\/p>\n<p>\nFor higher-power equipment, the PCI-6520 relay should generally control an appropriate external contactor, relay, or control input rather than directly switching a load that exceeds the relay ratings.\n<\/p>\n<h3>Switching AC and DC Loads<\/h3>\n<p>\nElectromechanical relay contacts can switch compatible AC and DC circuits, subject to the specified voltage, current, and switching-power limits.\n<\/p>\n<p>\nThe maximum permissible load can differ significantly between AC and DC applications. Therefore, the official relay contact ratings should always be checked before connecting a load.\n<\/p>\n<h3>Inductive Load Considerations<\/h3>\n<p>\nInductive loads such as relays, solenoids, contactors, and motors can generate significant voltage transients when switched.\n<\/p>\n<p>\nAppropriate suppression should be used when required, such as:\n<\/p>\n<ul>\n<li>Flyback diodes for compatible DC loads<\/li>\n<li>RC snubbers<\/li>\n<li>Transient voltage suppressors<\/li>\n<li>External relay interfaces<\/li>\n<li>Properly rated contactors<\/li>\n<\/ul>\n<p>\nThe suppression method should be selected according to the load and circuit architecture.\n<\/p>\n<h3>Relay Contact Life<\/h3>\n<p>\nBecause the PCI-6520 uses electromechanical relays, the output contacts have a finite mechanical and electrical operating life.\n<\/p>\n<p>\nRelay life depends on factors including:\n<\/p>\n<ul>\n<li>Switched voltage<\/li>\n<li>Load current<\/li>\n<li>AC or DC operation<\/li>\n<li>Resistive or inductive load<\/li>\n<li>Switching frequency<\/li>\n<li>Environmental conditions<\/li>\n<\/ul>\n<p>\nFor applications requiring extremely frequent switching, a solid-state digital output device may be more appropriate.\n<\/p>\n<h3>PCI-6520 vs PCI-6519<\/h3>\n<p>\nThe PCI-6520 and PCI-6519 are both isolated industrial digital I\/O devices, but their output architectures are fundamentally different.\n<\/p>\n<table>\n<tr>\n<th>\u0424\u0443\u043d\u043a\u0446\u0438\u044f<\/th>\n<th>PCI-6520<\/th>\n<th>PCI-6519<\/th>\n<\/tr>\n<tr>\n<td>Bus<\/td>\n<td>PCI<\/td>\n<td>PCI<\/td>\n<\/tr>\n<tr>\n<td>Digital Inputs<\/td>\n<td><strong>8<\/strong><\/td>\n<td>16<\/td>\n<\/tr>\n<tr>\n<td>Digital Outputs<\/td>\n<td><strong>8<\/strong><\/td>\n<td>16<\/td>\n<\/tr>\n<tr>\n<td>\u0422\u0438\u043f \u0432\u044b\u0432\u043e\u0434\u0430<\/td>\n<td><strong>Electromechanical Relay<\/strong><\/td>\n<td>Current-Sinking Semiconductor<\/td>\n<\/tr>\n<tr>\n<td>\u0418\u0437\u043e\u043b\u044f\u0446\u0438\u044f<\/td>\n<td>\u0414\u0430<\/td>\n<td>Bank-Isolated<\/td>\n<\/tr>\n<tr>\n<td>High-Speed Switching<\/td>\n<td>No<\/td>\n<td><strong>Better Suited<\/strong><\/td>\n<\/tr>\n<tr>\n<td>Contact-Based Switching<\/td>\n<td><strong>\u0414\u0430<\/strong><\/td>\n<td>No<\/td>\n<\/tr>\n<tr>\n<td>Primary Strength<\/td>\n<td>Relay Switching<\/td>\n<td>Industrial Digital Control<\/td>\n<\/tr>\n<\/table>\n<p>\nChoose the PCI-6520 when relay-contact switching is required. Choose the PCI-6519 when the application requires more channels and current-sinking semiconductor outputs.\n<\/p>\n<h3>PCI-6520 vs PCI-6515<\/h3>\n<p>\nThe PCI-6515 provides substantially more digital channels, while the PCI-6520 provides relay outputs.\n<\/p>\n<table>\n<tr>\n<th>\u0424\u0443\u043d\u043a\u0446\u0438\u044f<\/th>\n<th>PCI-6520<\/th>\n<th>PCI-6515<\/th>\n<\/tr>\n<tr>\n<td>Digital Inputs<\/td>\n<td>8<\/td>\n<td>32<\/td>\n<\/tr>\n<tr>\n<td>Digital Outputs<\/td>\n<td>8<\/td>\n<td>32<\/td>\n<\/tr>\n<tr>\n<td>Output Technology<\/td>\n<td><strong>Electromechanical Relay<\/strong><\/td>\n<td>Current-Sinking Semiconductor<\/td>\n<\/tr>\n<tr>\n<td>Channel Density<\/td>\n<td>Lower<\/td>\n<td><strong>Higher<\/strong><\/td>\n<\/tr>\n<tr>\n<td>Mechanical Contacts<\/td>\n<td><strong>\u0414\u0430<\/strong><\/td>\n<td>No<\/td>\n<\/tr>\n<tr>\n<td>Best For<\/td>\n<td>Relay \/ Contact Switching<\/td>\n<td>High-Density Industrial I\/O<\/td>\n<\/tr>\n<\/table>\n<h3>PCI-6520 vs Standard Relay Board<\/h3>\n<table>\n<tr>\n<th>\u0424\u0443\u043d\u043a\u0446\u0438\u044f<\/th>\n<th>PCI-6520<\/th>\n<th>Basic Relay Board<\/th>\n<\/tr>\n<tr>\n<td>PCI Computer Integration<\/td>\n<td><strong>\u0414\u0430<\/strong><\/td>\n<td>Model Dependent<\/td>\n<\/tr>\n<tr>\n<td>Digital Inputs<\/td>\n<td><strong>8<\/strong><\/td>\n<td>Often None<\/td>\n<\/tr>\n<tr>\n<td>Relay Outputs<\/td>\n<td><strong>8<\/strong><\/td>\n<td>Model Dependent<\/td>\n<\/tr>\n<tr>\n<td>Industrial I\/O Design<\/td>\n<td>\u0414\u0430<\/td>\n<td>Model Dependent<\/td>\n<\/tr>\n<tr>\n<td>NI Software Integration<\/td>\n<td><strong>\u0414\u0430<\/strong><\/td>\n<td>No<\/td>\n<\/tr>\n<tr>\n<td>Automated Test Integration<\/td>\n<td><strong>Strong<\/strong><\/td>\n<td>Model Dependent<\/td>\n<\/tr>\n<\/table>\n<h3>PCI-6520 vs Multifunction DAQ<\/h3>\n<p>\nThe PCI-6520 is not intended for conventional analog data acquisition.\n<\/p>\n<table>\n<tr>\n<th>\u0424\u0443\u043d\u043a\u0446\u0438\u044f<\/th>\n<th>PCI-6520<\/th>\n<th>Typical Multifunction DAQ<\/th>\n<\/tr>\n<tr>\n<td>Analog Input<\/td>\n<td>No<\/td>\n<td><strong>\u0414\u0430<\/strong><\/td>\n<\/tr>\n<tr>\n<td>Analog Output<\/td>\n<td>No<\/td>\n<td>Model Dependent<\/td>\n<\/tr>\n<tr>\n<td>Industrial Digital Inputs<\/td>\n<td><strong>8<\/strong><\/td>\n<td>Model Dependent<\/td>\n<\/tr>\n<tr>\n<td>Relay Outputs<\/td>\n<td><strong>8<\/strong><\/td>\n<td>Typically No<\/td>\n<\/tr>\n<tr>\n<td>Primary Application<\/td>\n<td>Industrial Monitoring and Switching<\/td>\n<td>Analog Measurement and General DAQ<\/td>\n<\/tr>\n<\/table>\n<h3>Software Integration<\/h3>\n<p>\nThe PCI-6520 can be controlled through compatible National Instruments software environments for automated digital monitoring and relay switching.\n<\/p>\n<p>\nA typical software workflow is:\n<\/p>\n<p>\n<strong>Initialize Device \u2192 Configure Inputs \u2192 Read Digital States \u2192 Evaluate Logic \u2192 Control Relay Outputs \u2192 Monitor System<\/strong>\n<\/p>\n<p>\nThe exact driver and software version should be verified when installing the PCI-6520 in a new or legacy system.\n<\/p>\n<h3>LabVIEW Integration<\/h3>\n<p>\nThe PCI-6520 can be incorporated into compatible LabVIEW-based automation and automated test applications.\n<\/p>\n<p>\n\u0422\u0438\u043f\u0438\u0447\u043d\u044b\u0435 \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u0432\u043a\u043b\u044e\u0447\u0430\u044e\u0442:\n<\/p>\n<ul>\n<li>Relay control panels<\/li>\n<li>Test fixture automation<\/li>\n<li>Machine monitoring<\/li>\n<li>Production test sequencing<\/li>\n<li>Equipment control<\/li>\n<li>Alarm monitoring<\/li>\n<li>Industrial switching systems<\/li>\n<\/ul>\n<h3>Legacy System Replacement<\/h3>\n<p>\nThe PCI-6520 is particularly relevant for maintaining existing PCI-based NI automation and test systems.\n<\/p>\n<p>\nBefore replacing an existing PCI-6520, verify:\n<\/p>\n<ul>\n<li>Exact model number<\/li>\n<li>PCI slot compatibility<\/li>\n<li>8 digital input requirement<\/li>\n<li>8 relay output requirement<\/li>\n<li>Relay contact configuration<\/li>\n<li>Switched voltage<\/li>\n<li>Load current<\/li>\n<li>AC or DC load requirements<\/li>\n<li>Existing field wiring<\/li>\n<li>Cable compatibility<\/li>\n<li>Terminal accessory compatibility<\/li>\n<li>Driver version<\/li>\n<li>Operating system compatibility<\/li>\n<li>Application software compatibility<\/li>\n<\/ul>\n<h3>How to Choose an Industrial Relay I\/O Device<\/h3>\n<p>\nBefore selecting the PCI-6520, evaluate:\n<\/p>\n<ul>\n<li>Required number of digital inputs<\/li>\n<li>Required number of relay outputs<\/li>\n<li>Relay contact configuration<\/li>\n<li>AC or DC switching requirements<\/li>\n<li>Maximum switching voltage<\/li>\n<li>Maximum load current<\/li>\n<li>Maximum switching power<\/li>\n<li>Required switching frequency<\/li>\n<li>Expected relay life<\/li>\n<li>Isolation requirements<\/li>\n<li>PCI slot compatibility<\/li>\n<li>Field wiring requirements<\/li>\n<li>Software compatibility<\/li>\n<\/ul>\n<h3>Industries<\/h3>\n<ul>\n<li>\u041f\u0440\u043e\u043c\u044b\u0448\u043b\u0435\u043d\u043d\u0430\u044f \u0430\u0432\u0442\u043e\u043c\u0430\u0442\u0438\u0437\u0430\u0446\u0438\u044f<\/li>\n<li>Manufacturing<\/li>\n<li>Automated Test<\/li>\n<li>Production Test<\/li>\n<li>Machine Building<\/li>\n<li>\u0410\u0432\u0442\u043e\u043c\u0430\u0442\u0438\u0437\u0430\u0446\u0438\u044f \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0441\u0442\u0432\u0430<\/li>\n<li>Electronic Manufacturing<\/li>\n<li>Equipment Testing<\/li>\n<li>Laboratory Automation<\/li>\n<li>Research and Development<\/li>\n<\/ul>\n<h3>Applications<\/h3>\n<h4>Relay Switching<\/h4>\n<p>\nThe eight electromechanical relay outputs can switch compatible external circuits under computer control.\n<\/p>\n<h4>Industrial Equipment Control<\/h4>\n<p>\nThe PCI-6520 can provide relay-contact control signals for compatible machines, controllers, alarms, and other industrial equipment.\n<\/p>\n<h4>Machine Monitoring<\/h4>\n<p>\nThe eight isolated digital inputs can monitor sensors, switches, machine states, alarms, and interlocks.\n<\/p>\n<h4>Automated Test<\/h4>\n<p>\nThe combination of digital inputs and relay outputs makes the PCI-6520 useful for automated test fixtures requiring both status monitoring and physical circuit switching.\n<\/p>\n<h4>Manufacturing Test<\/h4>\n<p>\nThe PCI-6520 can interface production test software with fixtures, external equipment, DUT status signals, and switched circuits.\n<\/p>\n<h4>Legacy Test System Maintenance<\/h4>\n<p>\nThe conventional PCI interface makes the PCI-6520 useful for replacing hardware in existing NI-based automation and test systems without redesigning the entire computer architecture.\n<\/p>\n<h3>Recommended Related Products<\/h3>\n<table>\n<tr>\n<td width=\"220\"><strong>PCI-6520<\/strong><\/td>\n<td>Industrial PCI digital I\/O device with 8 isolated digital inputs and 8 electromechanical relay outputs.<\/td>\n<\/tr>\n<tr>\n<td><strong>PCI-6519<\/strong><\/td>\n<td>16 DI and 16 sink DO industrial digital I\/O device for semiconductor-based industrial control.<\/td>\n<\/tr>\n<tr>\n<td><strong>PCI-6518<\/strong><\/td>\n<td>16 DI and 16 source DO industrial digital I\/O option.<\/td>\n<\/tr>\n<tr>\n<td><strong>PCI-6515<\/strong><\/td>\n<td>High-density industrial digital I\/O device with 32 DI and 32 sink DO.<\/td>\n<\/tr>\n<tr>\n<td><strong>PCI-6514<\/strong><\/td>\n<td>High-density industrial digital I\/O option with 32 DI and 32 source DO.<\/td>\n<\/tr>\n<tr>\n<td><strong>PCI-6521<\/strong><\/td>\n<td>Related NI industrial digital I\/O device for applications requiring a different relay and I\/O configuration.<\/td>\n<\/tr>\n<\/table>\n<h3>Why Choose PCI-6520?<\/h3>\n<ul>\n<li>8 \u0438\u0437\u043e\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u0446\u0438\u0444\u0440\u043e\u0432\u044b\u0445 \u0432\u0445\u043e\u0434\u043e\u0432<\/li>\n<li>8 electromechanical relay outputs<\/li>\n<li>16 total industrial I\/O channels<\/li>\n<li>Relay-contact switching<\/li>\n<li>Electrical isolation<\/li>\n<li>Compatible AC\/DC circuit switching within rated limits<\/li>\n<li>Suitable for contact-closure applications<\/li>\n<li>PCI host interface<\/li>\n<li>Suitable for industrial automation<\/li>\n<li>Suitable for equipment control<\/li>\n<li>Suitable for manufacturing test<\/li>\n<li>Suitable for automated test fixtures<\/li>\n<li>Useful for legacy PCI system maintenance<\/li>\n<\/ul>\n<h3>Frequently Asked Questions<\/h3>\n<h4>What is the NI PCI-6520?<\/h4>\n<p>\nThe NI PCI-6520 is an industrial digital I\/O device for PCI-based computers that combines isolated digital input channels with electromechanical relay outputs for monitoring and switching applications.\n<\/p>\n<h4>How many digital inputs does PCI-6520 have?<\/h4>\n<p>\nThe PCI-6520 provides <strong>8 industrial digital input channels<\/strong>.\n<\/p>\n<h4>How many outputs does PCI-6520 have?<\/h4>\n<p>\nThe PCI-6520 provides <strong>8 electromechanical relay output channels<\/strong>.\n<\/p>\n<h4>Does PCI-6520 use transistor outputs?<\/h4>\n<p>\nNo. The PCI-6520 uses <strong>electromechanical relay outputs<\/strong> rather than conventional source or sink transistor outputs.\n<\/p>\n<h4>What is the main advantage of PCI-6520?<\/h4>\n<p>\nOne of its primary advantages is the combination of isolated digital input monitoring and software-controlled relay-contact switching on a single PCI device.\n<\/p>\n<h4>Can PCI-6520 switch AC signals?<\/h4>\n<p>\nIts electromechanical relay contacts can switch compatible AC circuits within the specified relay voltage, current, and switching-power ratings. Always verify the exact load against the hardware specifications before connection.\n<\/p>\n<h4>Can PCI-6520 switch DC signals?<\/h4>\n<p>\nYes. The relay contacts can switch compatible DC circuits within their specified ratings. DC switching capability can differ significantly from AC switching capability, particularly with inductive loads.\n<\/p>\n<h4>Can PCI-6520 be used as a dry-contact output?<\/h4>\n<p>\nIts relay-based architecture is suitable for many applications requiring contact switching. The exact contact configuration and external circuit requirements should be verified against the PCI-6520 specifications and pinout.\n<\/p>\n<h4>Can PCI-6520 control relays or contactors?<\/h4>\n<p>\nYes. The PCI-6520 relay outputs can be used to switch compatible external relay or contactor control circuits, provided the coil voltage, current, and switching characteristics remain within the PCI-6520 relay contact ratings.\n<\/p>\n<h4>Can PCI-6520 directly control a motor?<\/h4>\n<p>\nThe PCI-6520 should not directly switch a motor unless the complete motor load is explicitly within the relay contact ratings. In most industrial systems, the PCI-6520 should control an appropriately rated external contactor, motor starter, or relay instead.\n<\/p>\n<h4>Is PCI-6520 isolated?<\/h4>\n<p>\nYes. The PCI-6520 is designed as an isolated industrial digital I\/O device, providing electrical separation appropriate for industrial monitoring and relay-switching applications.\n<\/p>\n<h4>Does PCI-6520 have analog input or analog output?<\/h4>\n<p>\nNo. The PCI-6520 is a digital I\/O and relay-switching device. It does not provide conventional analog input or analog output channels.\n<\/p>\n<h4>What is the difference between PCI-6520 and PCI-6519?<\/h4>\n<p>\nThe PCI-6520 provides 8 digital inputs and 8 electromechanical relay outputs. The PCI-6519 provides 16 digital inputs and 16 current-sinking semiconductor outputs. Choose the PCI-6520 when relay-contact switching is required and the PCI-6519 when higher-density semiconductor digital control is required.\n<\/p>\n<h4>Is PCI-6520 suitable for automated test systems?<\/h4>\n<p>\nYes. It is particularly useful for automated test fixtures requiring isolated status inputs and software-controlled relay switching.\n<\/p>\n<h4>Do PCI-6520 relay outputs have a limited operating life?<\/h4>\n<p>\nYes. Because they are electromechanical relays, the contacts have a finite mechanical and electrical life. Actual life depends on load voltage, current, load type, switching frequency, and operating conditions.\n<\/p>\n<h4>Is PCI-6520 suitable for high-frequency switching?<\/h4>\n<p>\nNo. Electromechanical relays are generally better suited to relatively low-frequency switching. Applications requiring rapid or extremely frequent digital switching are normally better served by an appropriate solid-state digital output device.\n<\/p>\n<h4>What should I check before purchasing PCI-6520?<\/h4>\n<p>\nVerify the 8-input and 8-relay-output configuration, relay contact type, AC or DC switching requirements, maximum voltage and current, load characteristics, required isolation, PCI slot compatibility, cable and terminal accessories, software environment, operating system, and existing application compatibility.\n<\/p>\n<h3>\u0417\u0430\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u0435<\/h3>\n<p>\n\u0417\u0435\u043c\u043b\u044f <strong>NI PCI-6520 Industrial Digital I\/O Device<\/strong> combines 8 isolated digital inputs with 8 electromechanical relay outputs for PCI-based industrial monitoring and control. Its relay-contact architecture makes it particularly suitable for automated test fixtures, manufacturing test, equipment control, contact-closure applications, machine monitoring, industrial automation, and maintenance of existing PCI-based NI systems.<\/p>","protected":false},"excerpt":{"rendered":"<p>Bus Connector: PCI<br \/>\n\u041a\u043e\u043b\u0438\u0447\u0435\u0441\u0442\u0432\u043e \u0434\u0432\u0443\u043d\u0430\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u043d\u044b\u0445 \u0446\u0438\u0444\u0440\u043e\u0432\u044b\u0445 \u043a\u0430\u043d\u0430\u043b\u043e\u0432: 0<br \/>\n\u041a\u043e\u043b\u0438\u0447\u0435\u0441\u0442\u0432\u043e \u043a\u0430\u043d\u0430\u043b\u043e\u0432 \u0442\u043e\u043b\u044c\u043a\u043e \u0446\u0438\u0444\u0440\u043e\u0432\u043e\u0433\u043e \u0432\u0432\u043e\u0434\u0430: 8<br \/>\n\u041a\u043e\u043b\u0438\u0447\u0435\u0441\u0442\u0432\u043e \u043a\u0430\u043d\u0430\u043b\u043e\u0432 \u0432\u044b\u0432\u043e\u0434\u0430 \u0446\u0438\u0444\u0440\u043e\u0432\u044b\u0445 \u0441\u0438\u0433\u043d\u0430\u043b\u043e\u0432: 8<br \/>\nDigital Input Voltage Range: -30 V to 30 V<br \/>\nOutput Voltage Range: 0 V to 60 V<br \/>\n\u041c\u0430\u043a\u0441\u0438\u043c\u0430\u043b\u044c\u043d\u0430\u044f \u0442\u0430\u043a\u0442\u043e\u0432\u0430\u044f \u0447\u0430\u0441\u0442\u043e\u0442\u0430: \u2013<br \/>\nSingle-Ended Digital I\/O Channel Current Drive: 2 A<\/p>","protected":false},"featured_media":31123,"template":"","meta":{"_acf_changed":false},"product_brand":[18],"product_cat":[674],"product_tag":[],"class_list":["post-34521","product","type-product","status-publish","has-post-thumbnail","product_brand-national-instruments","product_cat-pci-usb","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) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>NI 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