{"id":34616,"date":"2026-08-07T13:08:47","date_gmt":"2026-08-07T05:08:47","guid":{"rendered":"https:\/\/pxisource.com\/?post_type=product&#038;p=34616"},"modified":"2026-08-27T19:45:31","modified_gmt":"2026-08-27T11:45:31","slug":"pcie-8431-16","status":"publish","type":"product","link":"https:\/\/pxisource.com\/ru\/product\/pcie-8431-16\/","title":{"rendered":"PCIe-8431\/16"},"content":{"rendered":"<h3>Product Introduction<\/h3>\n<p>\n\u0417\u0435\u043c\u043b\u044f <strong>NI PCIe-8431\/16<\/strong> \u0432\u044b\u0441\u043e\u043a\u043e\u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0439 <strong>16-port RS-485\/RS-422 serial interface device<\/strong> designed for industrial communication, automated test, instrument control, production systems, laboratory automation, and integration of multiple serial devices.\n<\/p>\n<p>\nThe PCIe-8431\/16 combines <strong>16 independent serial ports<\/strong> with a PCI Express host interface and supports communication rates up to <strong>3 Mb\/s<\/strong>. It supports both RS-485 and RS-422 communication and provides selectable 2-wire and 4-wire transceiver modes for half-duplex and full-duplex applications.\n<\/p>\n<p>\nWith high-performance DMA transfers, multithreading, and multiprocessor support, the PCIe-8431\/16 is particularly suitable for applications that require simultaneous communication with many industrial or test devices.\n<\/p>\n<h3>Product Overview<\/h3>\n<p>\n\u0417\u0435\u043c\u043b\u044f <strong>National Instruments PCIe-8431\/16<\/strong> provides a high-density serial communication solution for computers equipped with a compatible PCI Express slot.\n<\/p>\n<p>\nA typical architecture is:\n<\/p>\n<p>\n<strong>Host Computer \u2192 PCI Express \u2192 PCIe-8431\/16 \u2192 RS-485 \/ RS-422 \u2192 Instruments \/ Controllers \/ DUTs<\/strong>\n<\/p>\n<p>\nInstead of installing multiple low-port-count serial interfaces, the PCIe-8431\/16 provides up to 16 serial channels from a single PCI Express card.\n<\/p>\n<h3>Key Features<\/h3>\n<h4>16 Serial Communication Ports<\/h4>\n<p>\nThe PCIe-8431\/16 provides <strong>16 serial channels<\/strong>, making it suitable for systems that need to communicate with many external devices simultaneously.\n<\/p>\n<p>\nTypical connected equipment can include:\n<\/p>\n<ul>\n<li>Industrial controllers<\/li>\n<li>PLCs<\/li>\n<li>Test instruments<\/li>\n<li>Embedded controllers<\/li>\n<li>Motion-control equipment<\/li>\n<li>Sensors<\/li>\n<li>Barcode readers<\/li>\n<li>Production equipment<\/li>\n<li>Data acquisition equipment<\/li>\n<\/ul>\n<h4>RS-485 Support<\/h4>\n<p>\nThe PCIe-8431\/16 supports <strong>RS-485<\/strong>, a differential serial communication standard widely used in industrial environments.\n<\/p>\n<p>\nRS-485 is particularly suitable for applications requiring:\n<\/p>\n<ul>\n<li>Longer communication distances<\/li>\n<li>Improved noise immunity<\/li>\n<li>Industrial environments<\/li>\n<li>Multi-device communication<\/li>\n<li>Differential signaling<\/li>\n<\/ul>\n<h4>RS-422 Support<\/h4>\n<p>\nIn addition to RS-485, the PCIe-8431\/16 supports <strong>RS-422 serial communication<\/strong>.\n<\/p>\n<p>\nThis allows the same interface family to communicate with equipment using either RS-485 or RS-422 electrical standards.\n<\/p>\n<h4>Simultaneous RS-485 and RS-422 Operation<\/h4>\n<p>\nCompatible ports on the PCIe-8431\/16 can be used for <strong>RS-485 and RS-422 communication simultaneously<\/strong>.\n<\/p>\n<p>\n\u041d\u0430\u043f\u0440\u0438\u043c\u0435\u0440:\n<\/p>\n<p>\n<strong>Selected Ports \u2192 RS-485 Devices<\/strong><br \/>\n<strong>Other Ports \u2192 RS-422 Devices<\/strong>\n<\/p>\n<p>\nThis provides additional flexibility when a test or automation system contains equipment using different serial standards.\n<\/p>\n<h4>Up to 3 Mb\/s Communication<\/h4>\n<p>\nThe PCIe-8431\/16 supports serial communication rates from low baud rates up to a maximum of <strong>3 Mb\/s<\/strong> under supported operating modes.\n<\/p>\n<p>\nThis makes the device suitable for applications requiring significantly higher throughput than conventional low-speed serial interfaces.\n<\/p>\n<h4>2-Wire RS-485 Mode<\/h4>\n<p>\nThe PCIe-8431\/16 supports <strong>2-wire RS-485 communication<\/strong>.\n<\/p>\n<p>\nA 2-wire configuration commonly uses the same differential pair for transmitting and receiving data and is therefore typically associated with half-duplex communication.\n<\/p>\n<h4>4-Wire Communication Mode<\/h4>\n<p>\nThe device also supports <strong>4-wire transceiver configurations<\/strong>.\n<\/p>\n<p>\nSeparate differential pairs can be used for transmit and receive operations, allowing full-duplex communication in compatible systems.\n<\/p>\n<h4>Full-Duplex Communication<\/h4>\n<p>\nThe PCIe-8431\/16 supports compatible <strong>full-duplex serial communication<\/strong> configurations.\n<\/p>\n<p>\nFull-duplex operation allows transmission and reception to occur simultaneously when the connected device and wiring architecture support it.\n<\/p>\n<h4>Half-Duplex Communication<\/h4>\n<p>\nThe device also supports <strong>half-duplex communication<\/strong>, commonly used in 2-wire RS-485 networks.\n<\/p>\n<p>\nIn this architecture, connected devices share the communication pair and coordinate when each device transmits.\n<\/p>\n<h4>High-Performance DMA Transfers<\/h4>\n<p>\nThe PCIe-8431\/16 uses <strong>\u0432\u044b\u0441\u043e\u043a\u043e\u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0435 DMA-\u043f\u0435\u0440\u0435\u0434\u0430\u0447\u0438<\/strong> to efficiently transfer serial data between the interface hardware and host computer.\n<\/p>\n<p>\nDMA-based transfer architecture can reduce processor overhead compared with communication methods that require more direct CPU involvement.\n<\/p>\n<h4>Multithreading Support<\/h4>\n<p>\nThe PCIe-8431\/16 supports <strong>multithreaded applications<\/strong>, which is particularly valuable when multiple serial ports are communicating simultaneously.\n<\/p>\n<p>\nDifferent application threads can manage different communication tasks as part of a larger automated test or industrial control application.\n<\/p>\n<h4>Multiprocessor Support<\/h4>\n<p>\nThe interface architecture also supports <strong>multiprocessor systems<\/strong>, helping high-channel-count serial applications take advantage of modern host-computer architectures.\n<\/p>\n<h4>Standard COM Port Compatibility<\/h4>\n<p>\nNI serial interfaces appear as <strong>standard COM ports<\/strong> to compatible software.\n<\/p>\n<p>\nThis can simplify integration with existing applications that already communicate through standard serial ports.\n<\/p>\n<p>\nA typical application architecture is:\n<\/p>\n<p>\n<strong>Application Software \u2192 COM Port \u2192 NI Serial Driver \u2192 PCIe-8431\/16 \u2192 RS-485 \/ RS-422 Device<\/strong>\n<\/p>\n<h4>PCI Express Host Interface<\/h4>\n<p>\nThe PCIe-8431\/16 uses a <strong>PCI Express x1<\/strong> host interface.\n<\/p>\n<p>\nIt can be installed in compatible desktop, workstation, rackmount, or industrial computers with an appropriate PCI Express expansion slot.\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>Serial Interface Device<\/td>\n<\/tr>\n<tr>\n<td>\u041c\u043e\u0434\u0435\u043b\u044c<\/td>\n<td>PCIe-8431\/16<\/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>Part Number<\/td>\n<td>780592-02<\/td>\n<\/tr>\n<tr>\n<td>Host Interface<\/td>\n<td>PCI Express x1<\/td>\n<\/tr>\n<tr>\n<td>Serial Channels<\/td>\n<td>16<\/td>\n<\/tr>\n<tr>\n<td>Supported Serial Protocols<\/td>\n<td>RS-485 \/ RS-422<\/td>\n<\/tr>\n<tr>\n<td>Maximum Baud Rate<\/td>\n<td>3 Mb\/s<\/td>\n<\/tr>\n<tr>\n<td>Minimum Supported Baud Rate<\/td>\n<td>2 Baud<\/td>\n<\/tr>\n<tr>\n<td>Transceiver Modes<\/td>\n<td>2-Wire and 4-Wire<\/td>\n<\/tr>\n<tr>\n<td>Communication Modes<\/td>\n<td>Half-Duplex \/ Full-Duplex<\/td>\n<\/tr>\n<tr>\n<td>\u0418\u0437\u043e\u043b\u044f\u0446\u0438\u044f<\/td>\n<td>Non-Isolated<\/td>\n<\/tr>\n<tr>\n<td>Serial Connectors<\/td>\n<td>2 \u00d7 68-Pin VHDCI<\/td>\n<\/tr>\n<tr>\n<td>External Port Connection<\/td>\n<td>16 \u00d7 DB-9 Through Included Breakout Cables<\/td>\n<\/tr>\n<tr>\n<td>DMA<\/td>\n<td>Supported<\/td>\n<\/tr>\n<tr>\n<td>Multithreading<\/td>\n<td>Supported<\/td>\n<\/tr>\n<tr>\n<td>Multiprocessor Support<\/td>\n<td>Supported<\/td>\n<\/tr>\n<tr>\n<td>Software Interface<\/td>\n<td>Standard COM Port \/ NI-Serial<\/td>\n<\/tr>\n<tr>\n<td>Weight<\/td>\n<td>Approximately 101 g<\/td>\n<\/tr>\n<tr>\n<td>Dimensions<\/td>\n<td>11.12 \u00d7 17.53 cm<\/td>\n<\/tr>\n<tr>\n<td>Primary Applications<\/td>\n<td>Industrial Serial Communication, Automated Test, Instrument Control and System Integration<\/td>\n<\/tr>\n<\/table>\n<h3>How Does the PCIe-8431\/16 Work?<\/h3>\n<p>\nThe PCIe-8431\/16 provides the electrical and communication interface between software running on the host computer and external RS-485 or RS-422 devices.\n<\/p>\n<p>\nFor transmitted data:\n<\/p>\n<p>\n<strong>Application \u2192 COM Port \/ NI-Serial \u2192 PCIe-8431\/16 \u2192 RS-485 \/ RS-422 \u2192 External Device<\/strong>\n<\/p>\n<p>\nFor received data:\n<\/p>\n<p>\n<strong>External Device \u2192 RS-485 \/ RS-422 \u2192 PCIe-8431\/16 \u2192 Driver \u2192 Application<\/strong>\n<\/p>\n<p>\nEach port can be used to exchange commands, measurement data, status information, control messages, and other serial data with compatible external equipment.\n<\/p>\n<h3>16-Port Serial Architecture<\/h3>\n<p>\nHigh port density is one of the primary advantages of the PCIe-8431\/16.\n<\/p>\n<p>\nThe device uses two high-density 68-pin VHDCI connectors. Breakout cables convert these connections into standard DB-9 serial connectors.\n<\/p>\n<p>\nA simplified configuration is:\n<\/p>\n<p>\n<strong>VHDCI Connector 1 \u2192 Ports 1\u20138<\/strong><br \/>\n<strong>VHDCI Connector 2 \u2192 Ports 9\u201316<\/strong>\n<\/p>\n<p>\nThis architecture allows 16 external serial devices to be connected while keeping the PCI Express board itself compact.\n<\/p>\n<h3>Included Breakout Cables<\/h3>\n<p>\nThe PCIe-8431\/16 kit includes <strong>two 1-meter 68-pin VHDCI-to-eight-DB-9 serial cables<\/strong>.\n<\/p>\n<p>\nEach breakout cable converts one high-density connector into eight individual serial connections.\n<\/p>\n<p>\nTogether:\n<\/p>\n<p>\n<strong>2 Breakout Cables \u00d7 8 Ports = 16 Serial Ports<\/strong>\n<\/p>\n<p>\nWhen purchasing a replacement or used PCIe-8431\/16, confirm whether the required breakout cables are included.\n<\/p>\n<h3>RS-485 Communication<\/h3>\n<p>\nRS-485 uses differential signaling and is widely used in industrial environments because it provides good noise immunity and supports communication architectures involving multiple devices.\n<\/p>\n<p>\nTypical RS-485 applications include:\n<\/p>\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>Process equipment<\/li>\n<li>\u0423\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u043c\u0430\u0448\u0438\u043d\u043e\u0439<\/li>\n<li>Distributed sensors<\/li>\n<li>Production equipment<\/li>\n<li>Building automation<\/li>\n<li>Test-system communication<\/li>\n<\/ul>\n<h3>RS-422 Communication<\/h3>\n<p>\nRS-422 also uses differential signaling and is commonly used for reliable serial communication over longer distances than conventional RS-232.\n<\/p>\n<p>\nThe PCIe-8431\/16 supports RS-422 in addition to RS-485, allowing the device to integrate with a broad range of industrial and test equipment.\n<\/p>\n<h3>RS-485 vs RS-422<\/h3>\n<table>\n<tr>\n<th>\u0424\u0443\u043d\u043a\u0446\u0438\u044f<\/th>\n<th>RS-485<\/th>\n<th>RS-422<\/th>\n<\/tr>\n<tr>\n<td>Signaling<\/td>\n<td>Differential<\/td>\n<td>Differential<\/td>\n<\/tr>\n<tr>\n<td>Multi-Device Networks<\/td>\n<td><strong>Well Suited<\/strong><\/td>\n<td>More Limited<\/td>\n<\/tr>\n<tr>\n<td>2-Wire Operation<\/td>\n<td><strong>Common<\/strong><\/td>\n<td>Typically 4-Wire<\/td>\n<\/tr>\n<tr>\n<td>Half-Duplex<\/td>\n<td><strong>Common<\/strong><\/td>\n<td>Application Dependent<\/td>\n<\/tr>\n<tr>\n<td>Full-Duplex<\/td>\n<td>Supported with Appropriate Wiring<\/td>\n<td><strong>Common<\/strong><\/td>\n<\/tr>\n<tr>\n<td>Differential Noise Immunity<\/td>\n<td>High<\/td>\n<td>High<\/td>\n<\/tr>\n<\/table>\n<h3>2-Wire vs 4-Wire RS-485<\/h3>\n<table>\n<tr>\n<th>\u0424\u0443\u043d\u043a\u0446\u0438\u044f<\/th>\n<th>2-Wire<\/th>\n<th>4-Wire<\/th>\n<\/tr>\n<tr>\n<td>Data Pairs<\/td>\n<td>1 Differential Pair<\/td>\n<td>Separate TX and RX Pairs<\/td>\n<\/tr>\n<tr>\n<td>Typical Communication<\/td>\n<td>Half-Duplex<\/td>\n<td>Full-Duplex<\/td>\n<\/tr>\n<tr>\n<td>Wiring Complexity<\/td>\n<td><strong>Lower<\/strong><\/td>\n<td>Higher<\/td>\n<\/tr>\n<tr>\n<td>Simultaneous TX\/RX<\/td>\n<td>No<\/td>\n<td><strong>\u0414\u0430<\/strong><\/td>\n<\/tr>\n<\/table>\n<p>\nThe correct mode should be selected according to the communication architecture and wiring requirements of the connected equipment.\n<\/p>\n<h3>Important Note About 2-Wire Auto Control<\/h3>\n<p>\nAlthough the PCIe-8431\/16 supports a maximum serial rate of <strong>3 Mb\/s<\/strong>, the maximum rate for <strong>2-wire automatic RS-485 transceiver control mode is 2 Mbaud<\/strong>.\n<\/p>\n<p>\nThis distinction should be considered when designing high-speed 2-wire RS-485 systems.\n<\/p>\n<h3>\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 \u041f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f<\/h3>\n<p>\nThe PCIe-8431\/16 is well suited for industrial automation systems requiring communication with multiple serial devices.\n<\/p>\n<p>\n\u041d\u0430\u043f\u0440\u0438\u043c\u0435\u0440:\n<\/p>\n<p>\n<strong>Industrial PC \u2192 PCIe-8431\/16 \u2192 Multiple RS-485 Controllers \/ Sensors \/ Machines<\/strong>\n<\/p>\n<p>\nThe high port count can simplify system architecture by consolidating many serial connections onto a single PCI Express interface.\n<\/p>\n<h3>Automated Test Applications<\/h3>\n<p>\nThe PCIe-8431\/16 can integrate serial instruments and DUTs into automated test systems.\n<\/p>\n<p>\nA typical automated test platform may include:\n<\/p>\n<ul>\n<li>PCIe-8431\/16 serial interface<\/li>\n<li>DAQ devices<\/li>\n<li>Oscilloscopes or digitizers<\/li>\n<li>Programmable power supplies<\/li>\n<li>Electronic loads<\/li>\n<li>Switch systems<\/li>\n<li>\u0426\u0438\u0444\u0440\u043e\u0432\u043e\u0439 \u0432\u0432\u043e\u0434-\u0432\u044b\u0432\u043e\u0434<\/li>\n<li>Test fixtures<\/li>\n<\/ul>\n<p>\nThe host application can coordinate communication with multiple serial devices while performing measurements and automated test sequences.\n<\/p>\n<h3>Instrument Control<\/h3>\n<p>\nCompatible instruments using RS-485 or RS-422 can be controlled through the PCIe-8431\/16.\n<\/p>\n<p>\nTypical operations include:\n<\/p>\n<ul>\n<li>Sending configuration commands<\/li>\n<li>Starting measurements<\/li>\n<li>Reading measurement results<\/li>\n<li>Monitoring instrument status<\/li>\n<li>Changing operating parameters<\/li>\n<li>Logging serial data<\/li>\n<\/ul>\n<h3>Multi-Device Communication<\/h3>\n<p>\nThe 16-port architecture allows one computer to manage many independent serial connections.\n<\/p>\n<p>\n\u041d\u0430\u043f\u0440\u0438\u043c\u0435\u0440:\n<\/p>\n<p>\n<strong>Port 1 \u2192 Controller<\/strong><br \/>\n<strong>Port 2 \u2192 Sensor System<\/strong><br \/>\n<strong>Port 3 \u2192 Motion Controller<\/strong><br \/>\n<strong>Port 4 \u2192 Test Instrument<\/strong><br \/>\n<strong>Ports 5\u201316 \u2192 Additional Serial Equipment<\/strong>\n<\/p>\n<p>\nThis can significantly reduce the number of separate communication adapters required in complex systems.\n<\/p>\n<h3>RS-485 Network Termination<\/h3>\n<p>\nProper termination is important for reliable RS-485 communication, particularly at higher communication rates and longer cable lengths.\n<\/p>\n<p>\nBefore commissioning a network, verify:\n<\/p>\n<ul>\n<li>Termination resistance<\/li>\n<li>Biasing requirements<\/li>\n<li>Cable impedance<\/li>\n<li>Network topology<\/li>\n<li>Cable length<\/li>\n<li>Communication rate<\/li>\n<li>Number of connected devices<\/li>\n<\/ul>\n<p>\nIncorrect termination can cause reflections, communication errors, intermittent data loss, or complete communication failure.\n<\/p>\n<h3>RS-485 Biasing<\/h3>\n<p>\nRS-485 networks may require bias resistors to establish a known bus state when no transmitter is actively driving the network.\n<\/p>\n<p>\nBiasing should be configured according to the network topology, termination arrangement, connected devices, and application requirements.\n<\/p>\n<h3>High-Speed Serial Communication<\/h3>\n<p>\nThe PCIe-8431\/16 supports rates up to 3 Mb\/s, making it suitable for higher-throughput serial applications.\n<\/p>\n<p>\nHowever, reliable communication depends on the complete system, including:\n<\/p>\n<ul>\n<li>Baud rate<\/li>\n<li>Cable length<\/li>\n<li>Cable quality<\/li>\n<li>Termination<\/li>\n<li>Network topology<\/li>\n<li>Electrical noise<\/li>\n<li>Connected transceivers<\/li>\n<li>Wiring quality<\/li>\n<\/ul>\n<p>\nMaximum theoretical interface speed does not guarantee reliable operation at that rate under every physical network condition.\n<\/p>\n<h3>DMA-Based Data Transfer<\/h3>\n<p>\nThe PCIe-8431\/16 supports high-performance <strong>Direct Memory Access (DMA)<\/strong>.\n<\/p>\n<p>\nDMA allows serial data to be transferred efficiently between hardware and host memory, which can be valuable when many ports are simultaneously transmitting and receiving data.\n<\/p>\n<h3>Standard COM Port Operation<\/h3>\n<p>\nNI serial interfaces appear as standard COM ports in compatible operating systems.\n<\/p>\n<p>\nThis means many existing applications designed for standard serial communication can access the PCIe-8431\/16 without requiring a completely proprietary communication architecture.\n<\/p>\n<p>\nThe exact COM port numbers assigned by the operating system can vary according to system configuration.\n<\/p>\n<h3>NI-Serial Driver<\/h3>\n<p>\nThe PCIe-8431\/16 uses compatible <strong>NI-Serial<\/strong> software for serial interface configuration and operation.\n<\/p>\n<p>\nThe driver provides the software layer required for the host operating system and application software to access the serial ports.\n<\/p>\n<p>\nDriver and operating-system compatibility should always be verified before installing the device into an existing system.\n<\/p>\n<h3>LabVIEW Integration<\/h3>\n<p>\nThe PCIe-8431\/16 can be integrated into compatible <strong>\u041b\u0430\u0431\u0412\u044c\u044e<\/strong> applications for industrial communication, automated testing, device control, and data logging.\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>Serial instrument control<\/li>\n<li>Automated production testing<\/li>\n<li>Industrial device monitoring<\/li>\n<li>Multi-port data acquisition<\/li>\n<li>Serial data logging<\/li>\n<li>Equipment configuration<\/li>\n<\/ul>\n<h3>NI-VISA Integration<\/h3>\n<p>\nCompatible serial applications can use <strong>NI-VISA<\/strong> for communication with serial devices.\n<\/p>\n<p>\nA typical VISA workflow is:\n<\/p>\n<p>\n<strong>VISA Open \u2192 Configure Serial Port \u2192 VISA Write \u2192 VISA Read \u2192 VISA Close<\/strong>\n<\/p>\n<p>\nThis approach is commonly used when controlling serial instruments through LabVIEW or other supported development environments.\n<\/p>\n<h3>PCIe-8431\/16 vs PCIe-8430\/16<\/h3>\n<p>\nThe PCIe-8431\/16 and PCIe-8430\/16 provide the same high-density 16-port architecture but support different serial electrical standards.\n<\/p>\n<table>\n<tr>\n<th>\u0424\u0443\u043d\u043a\u0446\u0438\u044f<\/th>\n<th>PCIe-8431\/16<\/th>\n<th>PCIe-8430\/16<\/th>\n<\/tr>\n<tr>\n<td>Serial Standard<\/td>\n<td><strong>RS-485 \/ RS-422<\/strong><\/td>\n<td>\u0420\u0421-232<\/td>\n<\/tr>\n<tr>\n<td>Ports<\/td>\n<td>16<\/td>\n<td>16<\/td>\n<\/tr>\n<tr>\n<td>Maximum Baud Rate<\/td>\n<td><strong>3 Mb\/s<\/strong><\/td>\n<td>1 Mb\/s<\/td>\n<\/tr>\n<tr>\n<td>Differential Signaling<\/td>\n<td><strong>\u0414\u0430<\/strong><\/td>\n<td>No<\/td>\n<\/tr>\n<tr>\n<td>Multi-Device Industrial Networks<\/td>\n<td><strong>Better Suited<\/strong><\/td>\n<td>Point-to-Point Applications<\/td>\n<\/tr>\n<tr>\n<td>Host Interface<\/td>\n<td>PCI Express<\/td>\n<td>PCI Express<\/td>\n<\/tr>\n<\/table>\n<p>\nThe serial electrical standard required by the external equipment should be the primary selection criterion.\n<\/p>\n<h3>PCIe-8431\/16 vs PCIe-8431\/8<\/h3>\n<table>\n<tr>\n<th>\u0424\u0443\u043d\u043a\u0446\u0438\u044f<\/th>\n<th>PCIe-8431\/16<\/th>\n<th>PCIe-8431\/8<\/th>\n<\/tr>\n<tr>\n<td>Serial Standard<\/td>\n<td>RS-485 \/ RS-422<\/td>\n<td>RS-485 \/ RS-422<\/td>\n<\/tr>\n<tr>\n<td>Serial Ports<\/td>\n<td><strong>16<\/strong><\/td>\n<td>8<\/td>\n<\/tr>\n<tr>\n<td>Maximum Baud Rate<\/td>\n<td>3 Mb\/s<\/td>\n<td>3 Mb\/s<\/td>\n<\/tr>\n<tr>\n<td>Host Interface<\/td>\n<td>PCI Express<\/td>\n<td>PCI Express<\/td>\n<\/tr>\n<tr>\n<td>Best Application<\/td>\n<td><strong>High Port Count Systems<\/strong><\/td>\n<td>Medium Port Count Systems<\/td>\n<\/tr>\n<\/table>\n<h3>PCIe-8431\/16 vs PXIe-8431\/16<\/h3>\n<p>\nThe primary difference between these devices is the host platform.\n<\/p>\n<table>\n<tr>\n<th>\u0424\u0443\u043d\u043a\u0446\u0438\u044f<\/th>\n<th>PCIe-8431\/16<\/th>\n<th>PXIe-8431\/16<\/th>\n<\/tr>\n<tr>\n<td>Serial Protocol<\/td>\n<td>RS-485 \/ RS-422<\/td>\n<td>RS-485 \/ RS-422<\/td>\n<\/tr>\n<tr>\n<td>Ports<\/td>\n<td>16<\/td>\n<td>16<\/td>\n<\/tr>\n<tr>\n<td>Maximum Baud Rate<\/td>\n<td>3 Mb\/s<\/td>\n<td>3 Mb\/s<\/td>\n<\/tr>\n<tr>\n<td>Host Platform<\/td>\n<td><strong>PCI Express PC<\/strong><\/td>\n<td><strong>\u0428\u0430\u0441\u0441\u0438 PXI Express<\/strong><\/td>\n<\/tr>\n<tr>\n<td>Typical Installation<\/td>\n<td>Industrial \/ Desktop PC<\/td>\n<td>Modular PXIe Test System<\/td>\n<\/tr>\n<\/table>\n<h3>PCIe-8431\/16 vs Isolated Serial Interface<\/h3>\n<p>\nThe PCIe-8431\/16 is a <strong>non-isolated serial interface<\/strong>.\n<\/p>\n<p>\nFor systems where electrical isolation between the computer and serial network is required, an appropriate isolated NI serial interface should be considered.\n<\/p>\n<p>\nIsolation can be particularly important when:\n<\/p>\n<ul>\n<li>Ground potential differences are present<\/li>\n<li>Electrical noise is severe<\/li>\n<li>Equipment is distributed over large installations<\/li>\n<li>Ground loops are a concern<\/li>\n<li>Additional electrical protection is required<\/li>\n<\/ul>\n<h3>PCIe-8431\/16 vs USB RS-485 Adapter<\/h3>\n<table>\n<tr>\n<th>\u0424\u0443\u043d\u043a\u0446\u0438\u044f<\/th>\n<th>PCIe-8431\/16<\/th>\n<th>Typical USB RS-485 Adapter<\/th>\n<\/tr>\n<tr>\n<td>Installation<\/td>\n<td><strong>Internal PCI Express<\/strong><\/td>\n<td>External USB<\/td>\n<\/tr>\n<tr>\n<td>Ports<\/td>\n<td><strong>16<\/strong><\/td>\n<td>Usually Fewer<\/td>\n<\/tr>\n<tr>\n<td>Maximum Rate<\/td>\n<td>Up to 3 Mb\/s<\/td>\n<td>Device Dependent<\/td>\n<\/tr>\n<tr>\n<td>DMA<\/td>\n<td><strong>High-Performance DMA<\/strong><\/td>\n<td>Device Dependent<\/td>\n<\/tr>\n<tr>\n<td>Permanent Test-System Integration<\/td>\n<td><strong>Well Suited<\/strong><\/td>\n<td>Application Dependent<\/td>\n<\/tr>\n<\/table>\n<h3>Legacy System Replacement<\/h3>\n<p>\nThe PCIe-8431\/16 can be useful when maintaining or upgrading existing industrial and automated test systems that rely on RS-485 or RS-422 communication.\n<\/p>\n<p>\nBefore replacing another serial interface, verify:\n<\/p>\n<ul>\n<li>RS-485 or RS-422 requirement<\/li>\n<li>Number of required serial ports<\/li>\n<li>2-wire or 4-wire operation<\/li>\n<li>Half-duplex or full-duplex communication<\/li>\n<li>Required baud rate<\/li>\n<li>Isolation requirements<\/li>\n<li>Connector and cable configuration<\/li>\n<li>Network termination<\/li>\n<li>Bias resistor requirements<\/li>\n<li>Available PCI Express slot<\/li>\n<li>NI-Serial driver compatibility<\/li>\n<li>Operating system compatibility<\/li>\n<li>Existing application software<\/li>\n<\/ul>\n<h3>How to Choose an RS-485\/RS-422 Interface<\/h3>\n<p>\nBefore selecting the PCIe-8431\/16, determine:\n<\/p>\n<ul>\n<li>Required serial protocol<\/li>\n<li>Required number of ports<\/li>\n<li>Maximum baud rate<\/li>\n<li>2-wire or 4-wire configuration<\/li>\n<li>Half-duplex or full-duplex requirement<\/li>\n<li>Network topology<\/li>\n<li>Cable length<\/li>\n<li>Termination requirements<\/li>\n<li>Biasing requirements<\/li>\n<li>Electrical isolation requirements<\/li>\n<li>Host computer interface<\/li>\n<li>Driver and operating-system 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>Automated Test<\/li>\n<li>Electronic Manufacturing<\/li>\n<li>Production Test<\/li>\n<li>Laboratory Automation<\/li>\n<li>Process Control<\/li>\n<li>Machine Automation<\/li>\n<li>Research and Development<\/li>\n<li>Transportation<\/li>\n<li>\u0421\u0438\u0441\u0442\u0435\u043c\u043d\u0430\u044f \u0438\u043d\u0442\u0435\u0433\u0440\u0430\u0446\u0438\u044f<\/li>\n<\/ul>\n<h3>Applications<\/h3>\n<h4>\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<\/h4>\n<p>\nThe PCIe-8431\/16 provides high-density RS-485 and RS-422 connectivity for industrial controllers, sensors, machines, and automation equipment.\n<\/p>\n<h4>Automated Test<\/h4>\n<p>\nSixteen independent serial channels can integrate multiple instruments and DUT interfaces into a single automated test platform.\n<\/p>\n<h4>Instrument Control<\/h4>\n<p>\nCompatible RS-485 and RS-422 instruments can be configured, controlled, and monitored through the PCIe-8431\/16.\n<\/p>\n<h4>Production Test<\/h4>\n<p>\nProduction systems can communicate with multiple serial DUTs, fixtures, controllers, and supporting equipment from a single host computer.\n<\/p>\n<h4>Multi-Port Data Logging<\/h4>\n<p>\nThe 16-port architecture is suitable for applications that need to collect serial data from multiple independent devices.\n<\/p>\n<h4>Legacy Equipment Integration<\/h4>\n<p>\nExisting RS-485 and RS-422 equipment can be integrated into PCI Express-based computers without replacing the external serial devices.\n<\/p>\n<h3>Recommended Related Products<\/h3>\n<table>\n<tr>\n<td width=\"220\"><strong>PCIe-8431\/16<\/strong><\/td>\n<td>16-port PCI Express RS-485\/RS-422 interface for high-density industrial serial communication.<\/td>\n<\/tr>\n<tr>\n<td><strong>PCIe-8431\/8<\/strong><\/td>\n<td>8-port RS-485\/RS-422 PCI Express interface for applications requiring fewer serial channels.<\/td>\n<\/tr>\n<tr>\n<td><strong>PCIe-8430\/16<\/strong><\/td>\n<td>16-port PCI Express RS-232 interface for high-density RS-232 communication.<\/td>\n<\/tr>\n<tr>\n<td><strong>PXIe-8431\/16<\/strong><\/td>\n<td>16-port PXI Express RS-485\/RS-422 interface for modular automated test systems.<\/td>\n<\/tr>\n<tr>\n<td><strong>PCI-8433\/4<\/strong><\/td>\n<td>Isolated RS-485\/RS-422 serial interface for applications requiring electrical isolation.<\/td>\n<\/tr>\n<\/table>\n<h3>Why Choose PCIe-8431\/16?<\/h3>\n<ul>\n<li>16 independent serial channels<\/li>\n<li>RS-485 communication<\/li>\n<li>RS-422 communication<\/li>\n<li>Up to 3 Mb\/s maximum baud rate<\/li>\n<li>2-wire transceiver mode<\/li>\n<li>4-wire transceiver mode<\/li>\n<li>Half-duplex communication<\/li>\n<li>Full-duplex communication<\/li>\n<li>High-performance DMA transfers<\/li>\n<li>Multithreading support<\/li>\n<li>Multiprocessor support<\/li>\n<li>Standard COM port compatibility<\/li>\n<li>PCI Express x1 interface<\/li>\n<li>High-density serial communication<\/li>\n<li>Suitable for industrial automation<\/li>\n<li>Suitable for automated test<\/li>\n<li>Suitable for instrument control<\/li>\n<li>Suitable for production test<\/li>\n<\/ul>\n<h3>Frequently Asked Questions<\/h3>\n<h4>What is the NI PCIe-8431\/16?<\/h4>\n<p>\nThe NI PCIe-8431\/16 is a 16-port PCI Express serial interface device designed for high-speed communication with RS-485 and RS-422 equipment.\n<\/p>\n<h4>What is the part number of PCIe-8431\/16?<\/h4>\n<p>\nThe PCIe-8431\/16 is available under <strong>part number 780592-02<\/strong>.\n<\/p>\n<h4>How many serial ports does PCIe-8431\/16 have?<\/h4>\n<p>\nThe PCIe-8431\/16 provides <strong>16 serial channels<\/strong>.\n<\/p>\n<h4>Does PCIe-8431\/16 support RS-485?<\/h4>\n<p>\nYes. RS-485 is one of the primary serial communication standards supported by the PCIe-8431\/16.\n<\/p>\n<h4>Does PCIe-8431\/16 support RS-422?<\/h4>\n<p>\nYes. The PCIe-8431\/16 supports both <strong>RS-485 and RS-422<\/strong>.\n<\/p>\n<h4>Can PCIe-8431\/16 use RS-485 and RS-422 at the same time?<\/h4>\n<p>\nYes. Compatible ports can use RS-485 and RS-422 simultaneously, allowing different ports on the same card to communicate with equipment using the two standards.\n<\/p>\n<h4>What is the maximum baud rate of PCIe-8431\/16?<\/h4>\n<p>\nThe maximum supported serial communication rate is <strong>3 Mb\/s<\/strong>. The 2-wire automatic RS-485 transceiver-control mode has a maximum rate of 2 Mbaud.\n<\/p>\n<h4>Does PCIe-8431\/16 support 2-wire RS-485?<\/h4>\n<p>\nYes. The device supports selectable 2-wire and 4-wire transceiver configurations.\n<\/p>\n<h4>Does PCIe-8431\/16 support full-duplex communication?<\/h4>\n<p>\nYes. The PCIe-8431\/16 supports compatible full-duplex and half-duplex communication configurations.\n<\/p>\n<h4>Is PCIe-8431\/16 isolated?<\/h4>\n<p>\nNo. The PCIe-8431\/16 is a <strong>non-isolated<\/strong> RS-485\/RS-422 serial interface. If electrical isolation is required, select an appropriate isolated serial interface.\n<\/p>\n<h4>What connectors does PCIe-8431\/16 use?<\/h4>\n<p>\nThe card has <strong>two 68-pin VHDCI connectors<\/strong>. Breakout cables convert these connections into 16 individual DB-9 serial ports.\n<\/p>\n<h4>Are breakout cables included with PCIe-8431\/16?<\/h4>\n<p>\nNI lists two 1-meter 68-pin VHDCI-to-eight-DB-9 cables with the PCIe-8431\/16 device package, providing access to all 16 serial ports.\n<\/p>\n<h4>Does PCIe-8431\/16 appear as standard COM ports?<\/h4>\n<p>\nYes. NI serial interfaces appear as standard COM ports for compatibility with applications that use conventional serial communications.\n<\/p>\n<h4>Can PCIe-8431\/16 be used with LabVIEW?<\/h4>\n<p>\nYes. The PCIe-8431\/16 can be integrated into compatible LabVIEW applications for serial communication, instrument control, automated testing, and data logging.\n<\/p>\n<h4>What is the difference between PCIe-8431\/16 and PCIe-8430\/16?<\/h4>\n<p>\nThe PCIe-8431\/16 supports <strong>RS-485 and RS-422<\/strong> with rates up to 3 Mb\/s, while the PCIe-8430\/16 is designed for <strong>\u0420\u0421-232<\/strong> communication with a lower maximum baud rate.\n<\/p>\n<h4>What is the difference between PCIe-8431\/16 and PXIe-8431\/16?<\/h4>\n<p>\nThe primary difference is the host platform. PCIe-8431\/16 installs in a PCI Express computer, while PXIe-8431\/16 is designed for installation in a PXI Express chassis.\n<\/p>\n<h4>What should I check before purchasing PCIe-8431\/16?<\/h4>\n<p>\nVerify the RS-485\/RS-422 protocol requirement, required number of ports, baud rate, 2-wire or 4-wire configuration, half-duplex or full-duplex operation, isolation requirements, cable and connector configuration, termination and biasing requirements, available PCI Express slot, NI-Serial driver compatibility, operating system, and existing application software.\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 PCIe-8431\/16 16-Port RS-485\/RS-422 Serial Interface Device<\/strong> provides high-density industrial serial connectivity through a PCI Express interface. With 16 channels, communication rates up to 3 Mb\/s, selectable 2-wire and 4-wire modes, full- and half-duplex operation, DMA transfers, multithreading, multiprocessor support, and standard COM port compatibility, it is particularly suitable for industrial automation, automated test, instrument control, production systems, multi-device communication, and legacy RS-485\/RS-422 equipment integration.<\/p>","protected":false},"excerpt":{"rendered":"<p>Supported Power Input: \u2014<br \/>\nBus Connection: PCI Express<br \/>\n\u0422\u0438\u043f \u0438\u0437\u043e\u043b\u044f\u0446\u0438\u0438: \u041d\u0435\u0442<br \/>\n\u041a\u043e\u043b\u0438\u0447\u0435\u0441\u0442\u0432\u043e \u043f\u043e\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u0445 \u043a\u0430\u043d\u0430\u043b\u043e\u0432: 16<br \/>\nSupported Serial Protocols: RS485#RS422<br \/>\nOperating Temperature Range: \u2014<br \/>\nMaximum Baud Rate: \u2014<br \/>\nFront Connection Type: VHDCI(2)<br \/>\nNumber of Bidirectional Digital Channels: \u2014<\/p>","protected":false},"featured_media":33629,"template":"","meta":{"_acf_changed":false},"product_brand":[18],"product_cat":[674],"product_tag":[],"class_list":["post-34616","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 PCIe-8431\/16 PCIe Serial Interface Device 780592-02, In Stock | Project Pricing<\/title>\n<meta name=\"description\" content=\"NI PCIe-8431\/16 is a 16-port PCI Express RS-485\/RS-422 serial interface supporting up to 3 Mb\/s, DMA transfers, 2-wire\/4-wire modes and industrial communication.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, 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